Potential Masquerading as System32 DLL

Identifies suspicious instances of default system32 DLLs either unsigned or signed with non-MS certificates. This can potentially indicate the attempt to masquerade as system DLLs, perform DLL Search Order Hijacking or backdoor and resign legitimate DLLs.

Elastic rule (View on GitHub)

  1[metadata]
  2creation_date = "2023/08/18"
  3integration = ["endpoint"]
  4maturity = "production"
  5updated_date = "2026/06/17"
  6
  7[rule]
  8author = ["Elastic"]
  9description = """
 10Identifies suspicious instances of default system32 DLLs either unsigned or signed with non-MS certificates. This can
 11potentially indicate the attempt to masquerade as system DLLs, perform DLL Search Order Hijacking or backdoor and resign
 12legitimate DLLs.
 13"""
 14from = "now-9m"
 15index = ["logs-endpoint.events.library-*"]
 16language = "eql"
 17license = "Elastic License v2"
 18name = "Potential Masquerading as System32 DLL"
 19note = """## Triage and analysis
 20
 21### Investigating Potential Masquerading as System32 DLL
 22
 23This rule fires when a DLL with a name matching a known Windows System32 library is loaded from an unexpected path, is unsigned or signed by a non-Microsoft certificate, and was recently created or modified (within the last hour). This pattern is consistent with DLL Search Order Hijacking, DLL planting, or backdooring/resigning of legitimate system DLLs — all common defense evasion and persistence techniques used by both commodity malware and sophisticated threat actors.
 24
 25#### Possible investigation steps
 26
 27- Examine the full `dll.path` to determine where the suspicious DLL was loaded from. Paths under user-writable directories (`AppData`, `Temp`, `Downloads`, `ProgramData`) or application directories are high-fidelity indicators.
 28- Review `dll.code_signature` fields — check whether the DLL is unsigned, self-signed, or signed by an unexpected publisher. A trusted signature from a legitimate vendor may indicate a false positive; an invalid or absent signature warrants deeper investigation.
 29- Check `dll.Ext.relative_file_creation_time` and `dll.Ext.relative_file_name_modify_time` — a DLL dropped and loaded within seconds or minutes of each other strongly suggests staged execution.
 30- Identify the loading process (`process.name`, `process.executable`, `process.pid`) and examine its parent chain for unusual ancestry (e.g. Office spawning a loader, or a browser dropping a DLL).
 31- Retrieve the DLL and hash it with `Get-FileHash -Algorithm SHA256`. Search the hash across VirusTotal, Hybrid-Analysis, MalwareBazaar, and CISCO Talos.
 32- Check whether other hosts in the environment have loaded the same DLL path or hash — a single host is likely targeted or hands-on, widespread hits may indicate a worm or supply chain issue.
 33- Correlate with process creation events around the same timestamp to identify what dropped the DLL (downloaders, document macros, installers, etc.).
 34- Inspect the directory containing the DLL for other recently created files, scripts, or executables that may be part of the same drop.
 35
 36### False positive analysis
 37
 38- Legitimate third-party software occasionally ships DLLs with names that collide with System32 libraries (e.g. security vendors, game engines, virtualization software, and enterprise tooling). Validate the publisher via `dll.code_signature.subject_name` and cross-reference against known software installed on the host.
 39- Installer and update workflows may briefly stage DLLs in temp paths before moving them to their final location — check whether the loading process is a known installer (`msiexec.exe`, `setup.exe`, vendor updaters) and whether the DLL path disappears after a short window.
 40- DismHost.exe staging certain DLLs under `C:\\Windows\\Temp\\` during servicing operations is a known benign pattern already excluded in the query.
 41
 42### Related rules
 43
 44- Suspicious DLL Loaded for Persistence via Desktop File - c4818812-d44f-47be-aaef-4cfb2f9cc799
 45- Suspicious Process from Conhost - 28896382-7d4f-4d50-9b72-67091901fd26
 46- Potential DLL Side-Loading via Trusted Microsoft Programs - 1160dcdb-0a0a-4a79-91d8-9b84af7e0240
 47
 48### Response and remediation
 49
 50- Initiate the incident response process based on triage outcome. If the DLL is confirmed malicious, treat the host as compromised.
 51- Isolate the affected host and preserve a memory dump and disk image before remediation to retain forensic evidence.
 52- Delete the malicious DLL and any associated files identified during investigation.
 53- If DLL Search Order Hijacking is confirmed, identify the vulnerable application and remediate by patching, applying a safe DLL search mode (`HKLM\\SYSTEM\\CurrentControlSet\\Control\\Session Manager\\SafeDllSearchMode`), or restricting write permissions on directories in the application's search path.
 54- If a legitimate binary was backdoored and resigned, treat all binaries delivered via the same channel as suspect and investigate the supply chain.
 55- Block identified file hashes and signer certificates as appropriate at the endpoint and perimeter.
 56- Hunt for lateral movement or persistence mechanisms established after the DLL was loaded — check scheduled tasks, services, registry run keys, and WMI subscriptions created around the same timeframe.
 57- Determine the initial access vector and remediate to prevent reinfection.
 58"""
 59risk_score = 73
 60rule_id = "fb01d790-9f74-4e76-97dd-b4b0f7bf6435"
 61severity = "high"
 62tags = [
 63    "Domain: Endpoint",
 64    "Data Source: Elastic Defend",
 65    "OS: Windows",
 66    "Use Case: Threat Detection",
 67    "Tactic: Defense Evasion",
 68    "Tactic: Persistence",
 69    "Resources: Investigation Guide",
 70]
 71timestamp_override = "event.ingested"
 72type = "eql"
 73
 74query = '''
 75library where host.os.type == "windows" and event.action == "load" and 
 76(dll.Ext.relative_file_creation_time <= 3600 or dll.Ext.relative_file_name_modify_time <= 3600) and
 77    not (
 78      dll.path : (
 79        "?:\\Windows\\System32\\*",
 80        "?:\\Windows\\SysWOW64\\*",
 81        "?:\\Windows\\SystemTemp\\*",
 82        "?:\\$WINDOWS.~BT\\NewOS\\Windows\\WinSxS\\*",
 83        "?:\\$WINDOWS.~BT\\NewOS\\Windows\\System32\\*",
 84        "?:\\$WINDOWS.~BT\\Sources\\*",
 85        "?:\\$WINDOWS.~BT\\Work\\*",
 86        "?:\\Windows\\WinSxS\\*",
 87        "?:\\Windows\\SoftwareDistribution\\Download\\*",
 88        "?:\\Windows\\assembly\\NativeImages_v*"
 89      )
 90    ) and
 91    not (
 92      dll.code_signature.subject_name in (
 93        "Microsoft Windows",
 94        "Microsoft Corporation",
 95        "Microsoft Windows Hardware Abstraction Layer Publisher",
 96        "Microsoft Windows Publisher",
 97        "Microsoft Windows 3rd party Component",
 98        "Microsoft 3rd Party Application Component"
 99      ) and dll.code_signature.trusted == true
100    ) and not dll.code_signature.status : ("errorCode_endpoint*", "errorUntrustedRoot", "errorChaining") and
101    dll.name : (
102      "aadauthhelper.dll", "aadcloudap.dll", "aadjcsp.dll", "aadtb.dll", "aadwamextension.dll", "aarsvc.dll", "abovelockapphost.dll", "accessibilitycpl.dll", "accountaccessor.dll", "accountsrt.dll", "acgenral.dll", "aclayers.dll", "acledit.dll", "aclui.dll", "acmigration.dll", "acppage.dll", "acproxy.dll", "acspecfc.dll", "actioncenter.dll", "actioncentercpl.dll", "actionqueue.dll", "activationclient.dll", "activeds.dll", "activesynccsp.dll", "actxprxy.dll", "acwinrt.dll", "acxtrnal.dll", "adaptivecards.dll", "addressparser.dll", "adhapi.dll", "adhsvc.dll", "admtmpl.dll", "adprovider.dll", "adrclient.dll", "adsldp.dll", "adsldpc.dll", "adsmsext.dll", "adsnt.dll", "adtschema.dll", "advancedemojids.dll", "advapi32.dll", "advapi32res.dll", "advpack.dll", "aeevts.dll", "aeinv.dll", "aepic.dll", "ajrouter.dll", "altspace.dll", "amsi.dll", "amsiproxy.dll", "amstream.dll", "apds.dll", "aphostclient.dll", "aphostres.dll", "aphostservice.dll", "apisampling.dll", "apisetschema.dll", "apmon.dll", "apmonui.dll", "appcontracts.dll", "appextension.dll", "apphelp.dll", "apphlpdm.dll", "appidapi.dll", "appidsvc.dll", "appinfo.dll", "appinfoext.dll", "applicationframe.dll", "applockercsp.dll", "appmgmts.dll", "appmgr.dll", "appmon.dll", "appointmentapis.dll", "appraiser.dll", "appreadiness.dll", "apprepapi.dll", "appresolver.dll", "appsruprov.dll", "appvcatalog.dll", "appvclientps.dll", "appvetwclientres.dll", "appvintegration.dll", "appvmanifest.dll", "appvpolicy.dll", "appvpublishing.dll", "appvreporting.dll", "appvscripting.dll", "appvsentinel.dll", "appvstreamingux.dll", "appvstreammap.dll", "appvterminator.dll", "appxalluserstore.dll", "appxpackaging.dll", "appxsip.dll", "appxsysprep.dll", "archiveint.dll", "asferror.dll", "aspnet_counters.dll", "asycfilt.dll", "atl.dll", "atlthunk.dll", "atmlib.dll", "audioeng.dll", "audiohandlers.dll", "audiokse.dll", "audioses.dll", "audiosrv.dll", "auditcse.dll", "auditpolcore.dll", "auditpolmsg.dll", "authbroker.dll", "authbrokerui.dll", "authentication.dll", "authext.dll", "authfwcfg.dll", "authfwgp.dll", "authfwsnapin.dll", "authfwwizfwk.dll", "authhostproxy.dll", "authui.dll", "authz.dll", "autopilot.dll", "autopilotdiag.dll", "autoplay.dll", "autotimesvc.dll", "avicap32.dll", "avifil32.dll", "avrt.dll", "axinstsv.dll", "azroles.dll", "azroleui.dll", "azsqlext.dll", "basecsp.dll", "basesrv.dll", "batmeter.dll", "bcastdvrbroker.dll", "bcastdvrclient.dll", "bcastdvrcommon.dll", "bcd.dll", "bcdprov.dll", "bcdsrv.dll", "bcp47langs.dll", "bcp47mrm.dll", "bcrypt.dll", "bcryptprimitives.dll", "bdehdcfglib.dll", "bderepair.dll", "bdesvc.dll", "bdesysprep.dll", "bdeui.dll", "bfe.dll", "bi.dll", "bidispl.dll", "bindfltapi.dll", "bingasds.dll", "bingfilterds.dll", "bingmaps.dll", "biocredprov.dll", "bisrv.dll", "bitlockercsp.dll", "bitsigd.dll", "bitsperf.dll", "bitsproxy.dll", "biwinrt.dll", "blbevents.dll", "blbres.dll", "blb_ps.dll", "bluetoothapis.dll", "bnmanager.dll", "bootmenuux.dll", "bootstr.dll", "bootux.dll", "bootvid.dll", "bridgeres.dll", "brokerlib.dll", "browcli.dll", "browserbroker.dll", "browseui.dll", "btagservice.dll", "bthavctpsvc.dll", "bthavrcp.dll", "bthavrcpappsvc.dll", "bthci.dll", "bthpanapi.dll", "bthradiomedia.dll", "bthserv.dll", "bthtelemetry.dll", "btpanui.dll", "bwcontexthandler.dll", "cabapi.dll", "cabinet.dll", "cabview.dll", "callbuttons.dll", "cameracaptureui.dll", "capauthz.dll", "capiprovider.dll", "capisp.dll", "captureservice.dll", "castingshellext.dll", "castlaunch.dll", "catsrv.dll", "catsrvps.dll", "catsrvut.dll", "cbdhsvc.dll", "cca.dll", "cdd.dll", "cdosys.dll", "cdp.dll", "cdprt.dll", "cdpsvc.dll", "cdpusersvc.dll", "cemapi.dll", "certca.dll", "certcli.dll", "certcredprovider.dll", "certenc.dll", "certenroll.dll", "certenrollui.dll", "certmgr.dll", "certpkicmdlet.dll", "certpoleng.dll", "certprop.dll", "cewmdm.dll", "cfgbkend.dll", "cfgmgr32.dll", "cfgspcellular.dll", "cfgsppolicy.dll", "cflapi.dll", "cfmifs.dll", "cfmifsproxy.dll", "chakra.dll", "chakradiag.dll", "chakrathunk.dll", "chartv.dll", "chatapis.dll", "chkwudrv.dll", "chsstrokeds.dll", "chtbopomofods.dll", "chtcangjieds.dll", "chthkstrokeds.dll", "chtquickds.dll", "chxapds.dll", "chxdecoder.dll", "chxhapds.dll", "chxinputrouter.dll", "chxranker.dll", "ci.dll", "cic.dll", "cimfs.dll", "circoinst.dll", "ciwmi.dll", "clb.dll", "clbcatq.dll", "cldapi.dll", "cleanpccsp.dll", "clfsw32.dll", "cliconfg.dll", "clipboardserver.dll", "clipc.dll", "clipsvc.dll", "clipwinrt.dll", "cloudap.dll", "cloudidsvc.dll", "clrhost.dll", "clusapi.dll", "cmcfg32.dll", "cmdext.dll", "cmdial32.dll", "cmgrcspps.dll", "cmifw.dll", "cmintegrator.dll", "cmlua.dll", "cmpbk32.dll", "cmstplua.dll", "cmutil.dll", "cngcredui.dll", "cngprovider.dll", "cnvfat.dll", "cofiredm.dll", "colbact.dll", "colorcnv.dll", "colorui.dll", "combase.dll", "comcat.dll", "comctl32.dll", "comdlg32.dll", "coml2.dll", "comppkgsup.dll", "compstui.dll", "computecore.dll", "computenetwork.dll", "computestorage.dll", "comrepl.dll", "comres.dll", "comsnap.dll", "comsvcs.dll", "comuid.dll", "configmanager2.dll", "conhostv1.dll", "connect.dll", "consentux.dll", "consentuxclient.dll", "console.dll", "consolelogon.dll", "contactapis.dll", "container.dll", "coredpus.dll", "coreglobconfig.dll", "coremas.dll", "coremessaging.dll", "coremmres.dll", "coreshell.dll", "coreshellapi.dll", "coreuicomponents.dll", "correngine.dll", "courtesyengine.dll", "cpfilters.dll", "creddialogbroker.dll", "credprovhelper.dll", "credprovhost.dll", "credprovs.dll", "credprovslegacy.dll", "credssp.dll", "credui.dll", "crypt32.dll", "cryptbase.dll", "cryptcatsvc.dll", "cryptdlg.dll", "cryptdll.dll", "cryptext.dll", "cryptnet.dll", "cryptngc.dll", "cryptowinrt.dll", "cryptsp.dll", "cryptsvc.dll", "crypttpmeksvc.dll", "cryptui.dll", "cryptuiwizard.dll", "cryptxml.dll", "cscapi.dll", "cscdll.dll", "cscmig.dll", "cscobj.dll", "cscsvc.dll", "cscui.dll", "csplte.dll", "cspproxy.dll", "csrsrv.dll", "cxcredprov.dll", "c_g18030.dll", "c_gsm7.dll", "c_is2022.dll", "c_iscii.dll", "d2d1.dll", "d3d10.dll", "d3d10core.dll", "d3d10level9.dll", "d3d10warp.dll", "d3d10_1.dll", "d3d10_1core.dll", "d3d11.dll", "d3d11on12.dll", "d3d12.dll", "d3d12core.dll", "d3d8thk.dll", "d3d9.dll", "d3d9on12.dll", "d3dscache.dll", "dab.dll", "dabapi.dll", "daconn.dll", "dafbth.dll", "dafdnssd.dll", "dafescl.dll", "dafgip.dll", "dafiot.dll", "dafipp.dll", "dafmcp.dll", "dafpos.dll", "dafprintprovider.dll", "dafupnp.dll", "dafwcn.dll", "dafwfdprovider.dll", "dafwiprov.dll", "dafwsd.dll", "damediamanager.dll", "damm.dll", "das.dll", "dataclen.dll", "datusage.dll", "davclnt.dll", "davhlpr.dll", "davsyncprovider.dll", "daxexec.dll", "dbgcore.dll", "dbgeng.dll", "dbghelp.dll", "dbgmodel.dll", "dbnetlib.dll", "dbnmpntw.dll", "dciman32.dll", "dcntel.dll", "dcomp.dll", "ddaclsys.dll", "ddcclaimsapi.dll", "ddds.dll", "ddisplay.dll", "ddoiproxy.dll", "ddores.dll", "ddpchunk.dll", "ddptrace.dll", "ddputils.dll", "ddp_ps.dll", "ddraw.dll", "ddrawex.dll", "defragproxy.dll", "defragres.dll", "defragsvc.dll", "deploymentcsps.dll", "deskadp.dll", "deskmon.dll", "desktopshellext.dll", "devenum.dll", "deviceaccess.dll", "devicecenter.dll", "devicecredential.dll", "devicepairing.dll", "deviceuxres.dll", "devinv.dll", "devmgr.dll", "devobj.dll", "devpropmgr.dll", "devquerybroker.dll", "devrtl.dll", "dfdts.dll", "dfscli.dll", "dfshim.dll", "dfsshlex.dll", "dggpext.dll", "dhcpcmonitor.dll", "dhcpcore.dll", "dhcpcore6.dll", "dhcpcsvc.dll", "dhcpcsvc6.dll", "dhcpsapi.dll", "diagcpl.dll", "diagnosticlogcsp.dll", "diagperf.dll", "diagsvc.dll", "diagtrack.dll", "dialclient.dll", "dialserver.dll", "dictationmanager.dll", "difxapi.dll", "dimsjob.dll", "dimsroam.dll", "dinput.dll", "dinput8.dll", "direct2ddesktop.dll", "directml.dll", "discan.dll", "dismapi.dll", "dispbroker.dll", "dispex.dll", "display.dll", "displaymanager.dll", "dlnashext.dll", "dmappsres.dll", "dmcfgutils.dll", "dmcmnutils.dll", "dmcsps.dll", "dmdlgs.dll", "dmdskmgr.dll", "dmdskres.dll", "dmdskres2.dll", "dmenrollengine.dll", "dmintf.dll", "dmiso8601utils.dll", "dmloader.dll", "dmocx.dll", "dmoleaututils.dll", "dmpushproxy.dll", "dmpushroutercore.dll", "dmrcdecoder.dll", "dmrserver.dll", "dmsynth.dll", "dmusic.dll", "dmutil.dll", "dmvdsitf.dll", "dmwappushsvc.dll", "dmwmicsp.dll", "dmxmlhelputils.dll", "dnsapi.dll", "dnscmmc.dll", "dnsext.dll", "dnshc.dll", "dnsrslvr.dll", "docprop.dll", "dolbydecmft.dll", "domgmt.dll", "dosettings.dll", "dosvc.dll", "dot3api.dll", "dot3cfg.dll", "dot3conn.dll", "dot3dlg.dll", "dot3gpclnt.dll", "dot3gpui.dll", "dot3hc.dll", "dot3mm.dll", "dot3msm.dll", "dot3svc.dll", "dot3ui.dll", "dpapi.dll", "dpapiprovider.dll", "dpapisrv.dll", "dpnaddr.dll", "dpnathlp.dll", "dpnet.dll", "dpnhpast.dll", "dpnhupnp.dll", "dpnlobby.dll", "dps.dll", "dpx.dll", "drprov.dll", "drt.dll", "drtprov.dll", "drttransport.dll", "drvsetup.dll", "drvstore.dll", "dsauth.dll", "dsccore.dll", "dsccoreconfprov.dll", "dsclient.dll", "dscproxy.dll", "dsctimer.dll", "dsdmo.dll", "dskquota.dll", "dskquoui.dll", "dsound.dll", "dsparse.dll", "dsprop.dll", "dsquery.dll", "dsreg.dll", "dsregtask.dll", "dsrole.dll", "dssec.dll", "dssenh.dll", "dssvc.dll", "dsui.dll", "dsuiext.dll", "dswave.dll", "dtsh.dll", "ducsps.dll", "dui70.dll", "duser.dll", "dusmapi.dll", "dusmsvc.dll", "dwmapi.dll", "dwmcore.dll", "dwmghost.dll", "dwminit.dll", "dwmredir.dll", "dwmscene.dll", "dwrite.dll", "dxcore.dll", "dxdiagn.dll", "dxgi.dll", "dxgwdi.dll", "dxilconv.dll", "dxmasf.dll", "dxp.dll", "dxpps.dll", "dxptasksync.dll", "dxtmsft.dll", "dxtrans.dll", "dxva2.dll", "dynamoapi.dll", "eapp3hst.dll", "eappcfg.dll", "eappcfgui.dll", "eappgnui.dll", "eapphost.dll", "eappprxy.dll", "eapprovp.dll", "eapputil.dll", "eapsimextdesktop.dll", "eapsvc.dll", "eapteapauth.dll", "eapteapconfig.dll", "eapteapext.dll", "easconsent.dll", "easwrt.dll", "edgeangle.dll", "edgecontent.dll", "edgehtml.dll", "edgeiso.dll", "edgemanager.dll", "edpauditapi.dll", "edpcsp.dll", "edptask.dll", "edputil.dll", "eeprov.dll", "eeutil.dll", "efsadu.dll", "efscore.dll", "efsext.dll", "efslsaext.dll", "efssvc.dll", "efsutil.dll", "efswrt.dll", "ehstorapi.dll", "ehstorpwdmgr.dll", "ehstorshell.dll", "els.dll", "elscore.dll", "elshyph.dll", "elslad.dll", "elstrans.dll", "emailapis.dll", "embeddedmodesvc.dll", "emojids.dll", "encapi.dll", "energy.dll", "energyprov.dll", "energytask.dll", "enrollmentapi.dll", "enterpriseapncsp.dll", "enterprisecsps.dll", "enterpriseetw.dll", "eqossnap.dll", "errordetails.dll", "errordetailscore.dll", "es.dll", "esclprotocol.dll", "esclscan.dll", "esclwiadriver.dll", "esdsip.dll", "esent.dll", "esentprf.dll", "esevss.dll", "eshims.dll", "etwrundown.dll", "euiccscsp.dll", "eventaggregation.dll", "eventcls.dll", "evr.dll", "execmodelclient.dll", "execmodelproxy.dll", "explorerframe.dll", "exsmime.dll", "extrasxmlparser.dll", "f3ahvoas.dll", "facilitator.dll", "familysafetyext.dll", "faultrep.dll", "fcon.dll", "fdbth.dll", "fdbthproxy.dll", "fddevquery.dll", "fde.dll", "fdeploy.dll", "fdphost.dll", "fdpnp.dll", "fdprint.dll", "fdproxy.dll", "fdrespub.dll", "fdssdp.dll", "fdwcn.dll", "fdwnet.dll", "fdwsd.dll", "feclient.dll", "ffbroker.dll", "fhcat.dll", "fhcfg.dll", "fhcleanup.dll", "fhcpl.dll", "fhengine.dll", "fhevents.dll", "fhshl.dll", "fhsrchapi.dll", "fhsrchph.dll", "fhsvc.dll", "fhsvcctl.dll", "fhtask.dll", "fhuxadapter.dll", "fhuxapi.dll", "fhuxcommon.dll", "fhuxgraphics.dll", "fhuxpresentation.dll", "fidocredprov.dll", "filemgmt.dll", "filterds.dll", "findnetprinters.dll", "firewallapi.dll", "flightsettings.dll", "fltlib.dll", "fluencyds.dll", "fmapi.dll", "fmifs.dll", "fms.dll", "fntcache.dll", "fontext.dll", "fontprovider.dll", "fontsub.dll", "fphc.dll", "framedyn.dll", "framedynos.dll", "frameserver.dll", "frprov.dll", "fsutilext.dll", "fthsvc.dll", "fundisc.dll", "fveapi.dll", "fveapibase.dll", "fvecerts.dll", "fvecpl.dll", "fveskybackup.dll", "fveui.dll", "fvewiz.dll", "fwbase.dll", "fwcfg.dll", "fwmdmcsp.dll", "fwpolicyiomgr.dll", "fwpuclnt.dll", "fwremotesvr.dll", "gameinput.dll", "gamemode.dll", "gamestreamingext.dll", "gameux.dll", "gamingtcui.dll", "gcdef.dll", "gdi32.dll", "gdi32full.dll", "gdiplus.dll", "generaltel.dll", "geocommon.dll", "geolocation.dll", "getuname.dll", "glmf32.dll", "globinputhost.dll", "glu32.dll", "gmsaclient.dll", "gpapi.dll", "gpcsewrappercsp.dll", "gpedit.dll", "gpprefcl.dll", "gpprnext.dll", "gpscript.dll", "gpsvc.dll", "gptext.dll", "graphicscapture.dll", "graphicsperfsvc.dll", "groupinghc.dll", "hal.dll", "halextpl080.dll", "hascsp.dll", "hashtagds.dll", "hbaapi.dll", "hcproviders.dll", "hdcphandler.dll", "heatcore.dll", "helppaneproxy.dll", "hgcpl.dll", "hhsetup.dll", "hid.dll", "hidcfu.dll", "hidserv.dll", "hlink.dll", "hmkd.dll", "hnetcfg.dll", "hnetcfgclient.dll", "hnetmon.dll", "hologramworld.dll", "holoshellruntime.dll", "holoshextensions.dll", "hotplug.dll", "hrtfapo.dll", "httpapi.dll", "httpprxc.dll", "httpprxm.dll", "httpprxp.dll", "httpsdatasource.dll", "htui.dll", "hvhostsvc.dll", "hvloader.dll", "hvsigpext.dll", "hvsocket.dll", "hydrogen.dll", "ia2comproxy.dll", "ias.dll", "iasacct.dll", "iasads.dll", "iasdatastore.dll", "iashlpr.dll", "iasmigplugin.dll", "iasnap.dll", "iaspolcy.dll", "iasrad.dll", "iasrecst.dll", "iassam.dll", "iassdo.dll", "iassvcs.dll", "icfupgd.dll", "icm32.dll", "icmp.dll", "icmui.dll", "iconcodecservice.dll", "icsigd.dll", "icsvc.dll", "icsvcext.dll", "icu.dll", "icuin.dll", "icuuc.dll", "idctrls.dll", "idlisten.dll", "idndl.dll", "idstore.dll", "ieadvpack.dll", "ieapfltr.dll", "iedkcs32.dll", "ieframe.dll", "iemigplugin.dll", "iepeers.dll", "ieproxy.dll", "iernonce.dll", "iertutil.dll", "iesetup.dll", "iesysprep.dll", "ieui.dll", "ifmon.dll", "ifsutil.dll", "ifsutilx.dll", "igddiag.dll", "ihds.dll", "ikeext.dll", "imagehlp.dll", "imageres.dll", "imagesp1.dll", "imapi.dll", "imapi2.dll", "imapi2fs.dll", "imgutil.dll", "imm32.dll", "implatsetup.dll", "indexeddblegacy.dll", "inetcomm.dll", "inetmib1.dll", "inetpp.dll", "inetppui.dll", "inetres.dll", "inked.dll", "inkobjcore.dll", "inproclogger.dll", "input.dll", "inputcloudstore.dll", "inputcontroller.dll", "inputhost.dll", "inputservice.dll", "inputswitch.dll", "inseng.dll", "installservice.dll", "internetmail.dll", "internetmailcsp.dll", "invagent.dll", "iologmsg.dll", "iphlpapi.dll", "iphlpsvc.dll", "ipnathlp.dll", "ipnathlpclient.dll", "ippcommon.dll", "ippcommonproxy.dll", "iprtprio.dll", "iprtrmgr.dll", "ipsecsnp.dll", "ipsecsvc.dll", "ipsmsnap.dll", "ipxlatcfg.dll", "iri.dll", "iscsicpl.dll", "iscsidsc.dll", "iscsied.dll", "iscsiexe.dll", "iscsilog.dll", "iscsium.dll", "iscsiwmi.dll", "iscsiwmiv2.dll", "ism.dll", "itircl.dll", "itss.dll", "iuilp.dll", "iumbase.dll", "iumcrypt.dll", "iumdll.dll", "iumsdk.dll", "iyuv_32.dll", "joinproviderol.dll", "joinutil.dll", "jpmapcontrol.dll", "jpndecoder.dll", "jpninputrouter.dll", "jpnranker.dll", "jpnserviceds.dll", "jscript.dll", "jscript9.dll", "jscript9diag.dll", "jsproxy.dll", "kbd101.dll", "kbd101a.dll", "kbd101b.dll", "kbd101c.dll", "kbd103.dll", "kbd106.dll", "kbd106n.dll", "kbda1.dll", "kbda2.dll", "kbda3.dll", "kbdadlm.dll", "kbdal.dll", "kbdarme.dll", "kbdarmph.dll", "kbdarmty.dll", "kbdarmw.dll", "kbdax2.dll", "kbdaze.dll", "kbdazel.dll", "kbdazst.dll", "kbdbash.dll", "kbdbe.dll", "kbdbene.dll", "kbdbgph.dll", "kbdbgph1.dll", "kbdbhc.dll", "kbdblr.dll", "kbdbr.dll", "kbdbu.dll", "kbdbug.dll", "kbdbulg.dll", "kbdca.dll", "kbdcan.dll", "kbdcher.dll", "kbdcherp.dll", "kbdcr.dll", "kbdcz.dll", "kbdcz1.dll", "kbdcz2.dll", "kbdda.dll", "kbddiv1.dll", "kbddiv2.dll", "kbddv.dll", "kbddzo.dll", "kbdes.dll", "kbdest.dll", "kbdfa.dll", "kbdfar.dll", "kbdfc.dll", "kbdfi.dll", "kbdfi1.dll", "kbdfo.dll", "kbdfr.dll", "kbdfthrk.dll", "kbdgae.dll", "kbdgeo.dll", "kbdgeoer.dll", "kbdgeome.dll", "kbdgeooa.dll", "kbdgeoqw.dll", "kbdgkl.dll", "kbdgn.dll", "kbdgr.dll", "kbdgr1.dll", "kbdgrlnd.dll", "kbdgthc.dll", "kbdhau.dll", "kbdhaw.dll", "kbdhe.dll", "kbdhe220.dll", "kbdhe319.dll", "kbdheb.dll", "kbdhebl3.dll", "kbdhela2.dll", "kbdhela3.dll", "kbdhept.dll", "kbdhu.dll", "kbdhu1.dll", "kbdibm02.dll", "kbdibo.dll", "kbdic.dll", "kbdinasa.dll", "kbdinbe1.dll", "kbdinbe2.dll", "kbdinben.dll", "kbdindev.dll", "kbdinen.dll", "kbdinguj.dll", "kbdinhin.dll", "kbdinkan.dll", "kbdinmal.dll", "kbdinmar.dll", "kbdinori.dll", "kbdinpun.dll", "kbdintam.dll", "kbdintel.dll", "kbdinuk2.dll", "kbdir.dll", "kbdit.dll", "kbdit142.dll", "kbdiulat.dll", "kbdjav.dll", "kbdjpn.dll", "kbdkaz.dll", "kbdkhmr.dll", "kbdkni.dll", "kbdkor.dll", "kbdkurd.dll", "kbdkyr.dll", "kbdla.dll", "kbdlao.dll", "kbdlisub.dll", "kbdlisus.dll", "kbdlk41a.dll", "kbdlt.dll", "kbdlt1.dll", "kbdlt2.dll", "kbdlv.dll", "kbdlv1.dll", "kbdlvst.dll", "kbdmac.dll", "kbdmacst.dll", "kbdmaori.dll", "kbdmlt47.dll", "kbdmlt48.dll", "kbdmon.dll", "kbdmonmo.dll", "kbdmonst.dll", "kbdmyan.dll", "kbdne.dll", "kbdnec.dll", "kbdnec95.dll", "kbdnecat.dll", "kbdnecnt.dll", "kbdnepr.dll", "kbdnko.dll", "kbdno.dll", "kbdno1.dll", "kbdnso.dll", "kbdntl.dll", "kbdogham.dll", "kbdolch.dll", "kbdoldit.dll", "kbdosa.dll", "kbdosm.dll", "kbdpash.dll", "kbdphags.dll", "kbdpl.dll", "kbdpl1.dll", "kbdpo.dll", "kbdro.dll", "kbdropr.dll", "kbdrost.dll", "kbdru.dll", "kbdru1.dll", "kbdrum.dll", "kbdsf.dll", "kbdsg.dll", "kbdsl.dll", "kbdsl1.dll", "kbdsmsfi.dll", "kbdsmsno.dll", "kbdsn1.dll", "kbdsora.dll", "kbdsorex.dll", "kbdsors1.dll", "kbdsorst.dll", "kbdsp.dll", "kbdsw.dll", "kbdsw09.dll", "kbdsyr1.dll", "kbdsyr2.dll", "kbdtaile.dll", "kbdtajik.dll", "kbdtam99.dll", "kbdtat.dll", "kbdth0.dll", "kbdth1.dll", "kbdth2.dll", "kbdth3.dll", "kbdtifi.dll", "kbdtifi2.dll", "kbdtiprc.dll", "kbdtiprd.dll", "kbdtt102.dll", "kbdtuf.dll", "kbdtuq.dll", "kbdturme.dll", "kbdtzm.dll", "kbdughr.dll", "kbdughr1.dll", "kbduk.dll", "kbdukx.dll", "kbdur.dll", "kbdur1.dll", "kbdurdu.dll", "kbdus.dll", "kbdusa.dll", "kbdusl.dll", "kbdusr.dll", "kbdusx.dll", "kbduzb.dll", "kbdvntc.dll", "kbdwol.dll", "kbdyak.dll", "kbdyba.dll", "kbdycc.dll", "kbdycl.dll", "kd.dll", "kdcom.dll", "kdcpw.dll", "kdhvcom.dll", "kdnet.dll", "kdnet_uart16550.dll", "kdscli.dll", "kdstub.dll", "kdusb.dll", "kd_02_10df.dll", "kd_02_10ec.dll", "kd_02_1137.dll", "kd_02_14e4.dll", "kd_02_15b3.dll", "kd_02_1969.dll", "kd_02_19a2.dll", "kd_02_1af4.dll", "kd_02_8086.dll", "kd_07_1415.dll", "kd_0c_8086.dll", "kerbclientshared.dll", "kerberos.dll", "kernel32.dll", "kernelbase.dll", "keycredmgr.dll", "keyiso.dll", "keymgr.dll", "knobscore.dll", "knobscsp.dll", "ksuser.dll", "ktmw32.dll", "l2gpstore.dll", "l2nacp.dll", "l2sechc.dll", "laprxy.dll", "legacynetux.dll", "lfsvc.dll", "libcrypto.dll", "licensemanager.dll", "licensingcsp.dll", "licensingdiagspp.dll", "licensingwinrt.dll", "licmgr10.dll", "linkinfo.dll", "lltdapi.dll", "lltdres.dll", "lltdsvc.dll", "lmhsvc.dll", "loadperf.dll", "localsec.dll", "localspl.dll", "localui.dll", "locationapi.dll", "lockappbroker.dll", "lockcontroller.dll", "lockscreendata.dll", "loghours.dll", "logoncli.dll", "logoncontroller.dll", "lpasvc.dll", "lpk.dll", "lsasrv.dll", "lscshostpolicy.dll", "lsm.dll", "lsmproxy.dll", "lstelemetry.dll", "luainstall.dll", "luiapi.dll", "lz32.dll", "magnification.dll", "maintenanceui.dll", "manageci.dll", "mapconfiguration.dll", "mapcontrolcore.dll", "mapgeocoder.dll", "mapi32.dll", "mapistub.dll", "maprouter.dll", "mapsbtsvc.dll", "mapsbtsvcproxy.dll", "mapscsp.dll", "mapsstore.dll", "mapstoasttask.dll", "mapsupdatetask.dll", "mbaeapi.dll", "mbaeapipublic.dll", "mbaexmlparser.dll", "mbmediamanager.dll", "mbsmsapi.dll", "mbussdapi.dll", "mccsengineshared.dll", "mccspal.dll", "mciavi32.dll", "mcicda.dll", "mciqtz32.dll", "mciseq.dll", "mciwave.dll", "mcrecvsrc.dll", "mdmcommon.dll", "mdmdiagnostics.dll", "mdminst.dll", "mdmmigrator.dll", "mdmregistration.dll", "memorydiagnostic.dll", "messagingservice.dll", "mf.dll", "mf3216.dll", "mfaacenc.dll", "mfasfsrcsnk.dll", "mfaudiocnv.dll", "mfc42.dll", "mfc42u.dll", "mfcaptureengine.dll", "mfcore.dll", "mfcsubs.dll", "mfds.dll", "mfdvdec.dll", "mferror.dll", "mfh263enc.dll", "mfh264enc.dll", "mfksproxy.dll", "mfmediaengine.dll", "mfmjpegdec.dll", "mfmkvsrcsnk.dll", "mfmp4srcsnk.dll", "mfmpeg2srcsnk.dll", "mfnetcore.dll", "mfnetsrc.dll", "mfperfhelper.dll", "mfplat.dll", "mfplay.dll", "mfps.dll", "mfreadwrite.dll", "mfsensorgroup.dll", "mfsrcsnk.dll", "mfsvr.dll", "mftranscode.dll", "mfvdsp.dll", "mfvfw.dll", "mfwmaaec.dll", "mgmtapi.dll", "mi.dll", "mibincodec.dll", "midimap.dll", "migisol.dll", "miguiresource.dll", "mimefilt.dll", "mimofcodec.dll", "minstoreevents.dll", "miracastinputmgr.dll", "miracastreceiver.dll", "mirrordrvcompat.dll", "mispace.dll", "mitigationclient.dll", "miutils.dll", "mlang.dll", "mmcbase.dll", "mmcndmgr.dll", "mmcshext.dll", "mmdevapi.dll", "mmgaclient.dll", "mmgaproxystub.dll", "mmres.dll", "mobilenetworking.dll", "modemui.dll", "modernexecserver.dll", "moricons.dll", "moshost.dll", "moshostclient.dll", "moshostcore.dll", "mosstorage.dll", "mp3dmod.dll", "mp43decd.dll", "mp4sdecd.dll", "mpeval.dll", "mpg4decd.dll", "mpr.dll", "mprapi.dll", "mprddm.dll", "mprdim.dll", "mprext.dll", "mprmsg.dll", "mpssvc.dll", "mpunits.dll", "mrmcorer.dll", "mrmdeploy.dll", "mrmindexer.dll", "mrt100.dll", "mrt_map.dll", "msaatext.dll", "msac3enc.dll", "msacm32.dll", "msafd.dll", "msajapi.dll", "msalacdecoder.dll", "msalacencoder.dll", "msamrnbdecoder.dll", "msamrnbencoder.dll", "msamrnbsink.dll", "msamrnbsource.dll", "msasn1.dll", "msauddecmft.dll", "msaudite.dll", "msauserext.dll", "mscandui.dll", "mscat32.dll", "msclmd.dll", "mscms.dll", "mscoree.dll", "mscorier.dll", "mscories.dll", "msctf.dll", "msctfmonitor.dll", "msctfp.dll", "msctfui.dll", "msctfuimanager.dll", "msdadiag.dll", "msdart.dll", "msdelta.dll", "msdmo.dll", "msdrm.dll", "msdtckrm.dll", "msdtclog.dll", "msdtcprx.dll", "msdtcspoffln.dll", "msdtctm.dll", "msdtcuiu.dll", "msdtcvsp1res.dll", "msfeeds.dll", "msfeedsbs.dll", "msflacdecoder.dll", "msflacencoder.dll", "msftedit.dll", "msheif.dll", "mshtml.dll", "mshtmldac.dll", "mshtmled.dll", "mshtmler.dll", "msi.dll", "msicofire.dll", "msidcrl40.dll", "msident.dll", "msidle.dll", "msidntld.dll", "msieftp.dll", "msihnd.dll", "msiltcfg.dll", "msimg32.dll", "msimsg.dll", "msimtf.dll", "msisip.dll", "msiso.dll", "msiwer.dll", "mskeyprotcli.dll", "mskeyprotect.dll", "msls31.dll", "msmpeg2adec.dll", "msmpeg2enc.dll", "msmpeg2vdec.dll", "msobjs.dll", "msoert2.dll", "msopusdecoder.dll", "mspatcha.dll", "mspatchc.dll", "msphotography.dll", "msports.dll", "msprivs.dll", "msrahc.dll", "msrating.dll", "msrawimage.dll", "msrdc.dll", "msrdpwebaccess.dll", "msrle32.dll", "msscntrs.dll", "mssecuser.dll", "mssign32.dll", "mssip32.dll", "mssitlb.dll", "mssph.dll", "mssprxy.dll", "mssrch.dll", "mssvp.dll", "mstask.dll", "mstextprediction.dll", "mstscax.dll", "msutb.dll", "msv1_0.dll", "msvcirt.dll", "msvcp110_win.dll", "msvcp120_clr0400.dll", "msvcp140_clr0400.dll", "msvcp60.dll", "msvcp_win.dll", "msvcr100_clr0400.dll", "msvcr120_clr0400.dll", "msvcrt.dll", "msvfw32.dll", "msvidc32.dll", "msvidctl.dll", "msvideodsp.dll", "msvp9dec.dll", "msvproc.dll", "msvpxenc.dll", "mswb7.dll", "mswebp.dll", "mswmdm.dll", "mswsock.dll", "msxml3.dll", "msxml3r.dll", "msxml6.dll", "msxml6r.dll", "msyuv.dll", "mtcmodel.dll", "mtf.dll", "mtfappserviceds.dll", "mtfdecoder.dll", "mtffuzzyds.dll", "mtfserver.dll", "mtfspellcheckds.dll", "mtxclu.dll", "mtxdm.dll", "mtxex.dll", "mtxoci.dll", "muifontsetup.dll", "mycomput.dll", "mydocs.dll", "napcrypt.dll", "napinsp.dll", "naturalauth.dll", "naturallanguage6.dll", "navshutdown.dll", "ncaapi.dll", "ncasvc.dll", "ncbservice.dll", "ncdautosetup.dll", "ncdprop.dll", "nci.dll", "ncobjapi.dll", "ncrypt.dll", "ncryptprov.dll", "ncryptsslp.dll", "ncsi.dll", "ncuprov.dll", "nddeapi.dll", "ndfapi.dll", "ndfetw.dll", "ndfhcdiscovery.dll", "ndishc.dll", "ndproxystub.dll", "nduprov.dll", "negoexts.dll", "netapi32.dll", "netbios.dll", "netcenter.dll", "netcfgx.dll", "netcorehc.dll", "netdiagfx.dll", "netdriverinstall.dll", "netevent.dll", "netfxperf.dll", "neth.dll", "netid.dll", "netiohlp.dll", "netjoin.dll", "netlogon.dll", "netman.dll", "netmsg.dll", "netplwiz.dll", "netprofm.dll", "netprofmsvc.dll", "netprovfw.dll", "netprovisionsp.dll", "netsetupapi.dll", "netsetupengine.dll", "netsetupshim.dll", "netsetupsvc.dll", "netshell.dll", "nettrace.dll", "netutils.dll", "networkexplorer.dll", "networkhelper.dll", "networkicon.dll", "networkproxycsp.dll", "networkstatus.dll", "networkuxbroker.dll", "newdev.dll", "nfcradiomedia.dll", "ngccredprov.dll", "ngcctnr.dll", "ngcctnrsvc.dll", "ngcisoctnr.dll", "ngckeyenum.dll", "ngcksp.dll", "ngclocal.dll", "ngcpopkeysrv.dll", "ngcprocsp.dll", "ngcrecovery.dll", "ngcsvc.dll", "ngctasks.dll", "ninput.dll", "nlaapi.dll", "nlahc.dll", "nlasvc.dll", "nlhtml.dll", "nlmgp.dll", "nlmproxy.dll", "nlmsprep.dll", "nlsbres.dll", "nlsdata0000.dll", "nlsdata0009.dll", "nlsdl.dll", "nlslexicons0009.dll", "nmadirect.dll", "normaliz.dll", "npmproxy.dll", "npsm.dll", "nrpsrv.dll", "nshhttp.dll", "nshipsec.dll", "nshwfp.dll", "nsi.dll", "nsisvc.dll", "ntasn1.dll", "ntdll.dll", "ntdsapi.dll", "ntlanman.dll", "ntlanui2.dll", "ntlmshared.dll", "ntmarta.dll", "ntprint.dll", "ntshrui.dll", "ntvdm64.dll", "objsel.dll", "occache.dll", "ocsetapi.dll", "odbc32.dll", "odbcbcp.dll", "odbcconf.dll", "odbccp32.dll", "odbccr32.dll", "odbccu32.dll", "odbcint.dll", "odbctrac.dll", "oemlicense.dll", "offfilt.dll", "officecsp.dll", "offlinelsa.dll", "offlinesam.dll", "offreg.dll", "ole32.dll", "oleacc.dll", "oleacchooks.dll", "oleaccrc.dll", "oleaut32.dll", "oledlg.dll", "oleprn.dll", "omadmagent.dll", "omadmapi.dll", "onebackuphandler.dll", "onex.dll", "onexui.dll", "opcservices.dll", "opengl32.dll", "ortcengine.dll", "osbaseln.dll", "osksupport.dll", "osuninst.dll", "p2p.dll", "p2pgraph.dll", "p2pnetsh.dll", "p2psvc.dll", "packager.dll", "panmap.dll", "pautoenr.dll", "pcacli.dll", "pcadm.dll", "pcaevts.dll", "pcasvc.dll", "pcaui.dll", "pcpksp.dll", "pcsvdevice.dll", "pcwum.dll", "pcwutl.dll", "pdh.dll", "pdhui.dll", "peerdist.dll", "peerdistad.dll", "peerdistcleaner.dll", "peerdistsh.dll", "peerdistsvc.dll", "peopleapis.dll", "peopleband.dll", "perceptiondevice.dll", "perfctrs.dll", "perfdisk.dll", "perfnet.dll", "perfos.dll", "perfproc.dll", "perfts.dll", "phoneom.dll", "phoneproviders.dll", "phoneservice.dll", "phoneserviceres.dll", "phoneutil.dll", "phoneutilres.dll", "photowiz.dll", "pickerplatform.dll", "pid.dll", "pidgenx.dll", "pifmgr.dll", "pimstore.dll", "pkeyhelper.dll", "pktmonapi.dll", "pku2u.dll", "pla.dll", "playlistfolder.dll", "playsndsrv.dll", "playtodevice.dll", "playtomanager.dll", "playtomenu.dll", "playtoreceiver.dll", "ploptin.dll", "pmcsnap.dll", "pngfilt.dll", "pnidui.dll", "pnpclean.dll", "pnppolicy.dll", "pnpts.dll", "pnpui.dll", "pnpxassoc.dll", "pnpxassocprx.dll", "pnrpauto.dll", "pnrphc.dll", "pnrpnsp.dll", "pnrpsvc.dll", "policymanager.dll", "polstore.dll", "posetup.dll", "posyncservices.dll", "pots.dll", "powercpl.dll", "powrprof.dll", "ppcsnap.dll", "prauthproviders.dll", "prflbmsg.dll", "printui.dll", "printwsdahost.dll", "prm0009.dll", "prncache.dll", "prnfldr.dll", "prnntfy.dll", "prntvpt.dll", "profapi.dll", "profext.dll", "profprov.dll", "profsvc.dll", "profsvcext.dll", "propsys.dll", "provcore.dll", "provdatastore.dll", "provdiagnostics.dll", "provengine.dll", "provhandlers.dll", "provisioningcsp.dll", "provmigrate.dll", "provops.dll", "provplugineng.dll", "provsysprep.dll", "provthrd.dll", "proximitycommon.dll", "proximityservice.dll", "prvdmofcomp.dll", "psapi.dll", "pshed.dll", "psisdecd.dll", "psmsrv.dll", "pstask.dll", "pstorec.dll", "ptpprov.dll", "puiapi.dll", "puiobj.dll", "pushtoinstall.dll", "pwlauncher.dll", "pwrshplugin.dll", "pwsso.dll", "qasf.dll", "qcap.dll", "qdv.dll", "qdvd.dll", "qedit.dll", "qedwipes.dll", "qmgr.dll", "query.dll", "quiethours.dll", "qwave.dll", "racengn.dll", "racpldlg.dll", "radardt.dll", "radarrs.dll", "radcui.dll", "rasadhlp.dll", "rasapi32.dll", "rasauto.dll", "raschap.dll", "raschapext.dll", "rasctrs.dll", "rascustom.dll", "rasdiag.dll", "rasdlg.dll", "rasgcw.dll", "rasman.dll", "rasmans.dll", "rasmbmgr.dll", "rasmediamanager.dll", "rasmm.dll", "rasmontr.dll", "rasplap.dll", "rasppp.dll", "rastapi.dll", "rastls.dll", "rastlsext.dll", "rdbui.dll", "rdpbase.dll", "rdpcfgex.dll", "rdpcore.dll", "rdpcorets.dll", "rdpencom.dll", "rdpendp.dll", "rdpnano.dll", "rdpsaps.dll", "rdpserverbase.dll", "rdpsharercom.dll", "rdpudd.dll", "rdpviewerax.dll", "rdsappxhelper.dll", "rdsdwmdr.dll", "rdvvmtransport.dll", "rdxservice.dll", "rdxtaskfactory.dll", "reagent.dll", "reagenttask.dll", "recovery.dll", "regapi.dll", "regctrl.dll", "regidle.dll", "regsvc.dll", "reguwpapi.dll", "reinfo.dll", "remotepg.dll", "remotewipecsp.dll", "reportingcsp.dll", "resampledmo.dll", "resbparser.dll", "reseteng.dll", "resetengine.dll", "resetengonline.dll", "resourcemapper.dll", "resutils.dll", "rgb9rast.dll", "riched20.dll", "riched32.dll", "rjvmdmconfig.dll", "rmapi.dll", "rmclient.dll", "rnr20.dll", "roamingsecurity.dll", "rometadata.dll", "rotmgr.dll", "rpcepmap.dll", "rpchttp.dll", "rpcns4.dll", "rpcnsh.dll", "rpcrt4.dll", "rpcrtremote.dll", "rpcss.dll", "rsaenh.dll", "rshx32.dll", "rstrtmgr.dll", "rtffilt.dll", "rtm.dll", "rtmediaframe.dll", "rtmmvrortc.dll", "rtutils.dll", "rtworkq.dll", "rulebasedds.dll", "samcli.dll", "samlib.dll", "samsrv.dll", "sas.dll", "sbe.dll", "sbeio.dll", "sberes.dll", "sbservicetrigger.dll", "scansetting.dll", "scardbi.dll", "scarddlg.dll", "scardsvr.dll", "scavengeui.dll", "scdeviceenum.dll", "scecli.dll", "scesrv.dll", "schannel.dll", "schedcli.dll", "schedsvc.dll", "scksp.dll", "scripto.dll", "scrobj.dll", "scrptadm.dll", "scrrun.dll", "sdcpl.dll", "sdds.dll", "sdengin2.dll", "sdfhost.dll", "sdhcinst.dll", "sdiageng.dll", "sdiagprv.dll", "sdiagschd.dll", "sdohlp.dll", "sdrsvc.dll", "sdshext.dll", "searchfolder.dll", "sechost.dll", "seclogon.dll", "secproc.dll", "secproc_isv.dll", "secproc_ssp.dll", "secproc_ssp_isv.dll", "secur32.dll", "security.dll", "semgrps.dll", "semgrsvc.dll", "sendmail.dll", "sens.dll", "sensapi.dll", "sensorsapi.dll", "sensorscpl.dll", "sensorservice.dll", "sensorsnativeapi.dll", "sensorsutilsv2.dll", "sensrsvc.dll", "serialui.dll", "servicinguapi.dll", "serwvdrv.dll", "sessenv.dll", "setbcdlocale.dll", "settingmonitor.dll", "settingsync.dll", "settingsynccore.dll", "setupapi.dll", "setupcl.dll", "setupcln.dll", "setupetw.dll", "sfc.dll", "sfc_os.dll", "sgrmenclave.dll", "shacct.dll", "shacctprofile.dll", "sharedpccsp.dll", "sharedrealitysvc.dll", "sharehost.dll", "sharemediacpl.dll", "shcore.dll", "shdocvw.dll", "shell32.dll", "shellstyle.dll", "shfolder.dll", "shgina.dll", "shimeng.dll", "shimgvw.dll", "shlwapi.dll", "shpafact.dll", "shsetup.dll", "shsvcs.dll", "shunimpl.dll", "shutdownext.dll", "shutdownux.dll", "shwebsvc.dll", "signdrv.dll", "simauth.dll", "simcfg.dll", "skci.dll", "slc.dll", "slcext.dll", "slwga.dll", "smartscreenps.dll", "smbhelperclass.dll", "smbwmiv2.dll", "smiengine.dll", "smphost.dll", "smsroutersvc.dll", "sndvolsso.dll", "snmpapi.dll", "socialapis.dll", "softkbd.dll", "softpub.dll", "sortwindows61.dll", "sortwindows62.dll", "spacebridge.dll", "spacecontrol.dll", "spatializerapo.dll", "spatialstore.dll", "spbcd.dll", "speechpal.dll", "spfileq.dll", "spinf.dll", "spmpm.dll", "spnet.dll", "spoolss.dll", "spopk.dll", "spp.dll", "sppc.dll", "sppcext.dll", "sppcomapi.dll", "sppcommdlg.dll", "sppinst.dll", "sppnp.dll", "sppobjs.dll", "sppwinob.dll", "sppwmi.dll", "spwinsat.dll", "spwizeng.dll", "spwizimg.dll", "spwizres.dll", "spwmp.dll", "sqlsrv32.dll", "sqmapi.dll", "srchadmin.dll", "srclient.dll", "srcore.dll", "srevents.dll", "srh.dll", "srhelper.dll", "srm.dll", "srmclient.dll", "srmlib.dll", "srmscan.dll", "srmshell.dll", "srmstormod.dll", "srmtrace.dll", "srm_ps.dll", "srpapi.dll", "srrstr.dll", "srumapi.dll", "srumsvc.dll", "srvcli.dll", "srvsvc.dll", "srwmi.dll", "sscore.dll", "sscoreext.dll", "ssdm.dll", "ssdpapi.dll", "ssdpsrv.dll", "sspicli.dll", "sspisrv.dll", "ssshim.dll", "sstpsvc.dll", "starttiledata.dll", "startupscan.dll", "stclient.dll", "sti.dll", "sti_ci.dll", "stobject.dll", "storageusage.dll", "storagewmi.dll", "storewuauth.dll", "storprop.dll", "storsvc.dll", "streamci.dll", "structuredquery.dll", "sud.dll", "svf.dll", "svsvc.dll", "swprv.dll", "sxproxy.dll", "sxs.dll", "sxshared.dll", "sxssrv.dll", "sxsstore.dll", "synccenter.dll", "synccontroller.dll", "synchostps.dll", "syncproxy.dll", "syncreg.dll", "syncres.dll", "syncsettings.dll", "syncutil.dll", "sysclass.dll", "sysfxui.dll", "sysmain.dll", "sysntfy.dll", "syssetup.dll", "systemcpl.dll", "t2embed.dll", "tabbtn.dll", "tabbtnex.dll", "tabsvc.dll", "tapi3.dll", "tapi32.dll", "tapilua.dll", "tapimigplugin.dll", "tapiperf.dll", "tapisrv.dll", "tapisysprep.dll", "tapiui.dll", "taskapis.dll", "taskbarcpl.dll", "taskcomp.dll", "taskschd.dll", "taskschdps.dll", "tbauth.dll", "tbs.dll", "tcbloader.dll", "tcpipcfg.dll", "tcpmib.dll", "tcpmon.dll", "tcpmonui.dll", "tdh.dll", "tdlmigration.dll", "tellib.dll", "termmgr.dll", "termsrv.dll", "tetheringclient.dll", "tetheringmgr.dll", "tetheringservice.dll", "tetheringstation.dll", "textshaping.dll", "themecpl.dll", "themeservice.dll", "themeui.dll", "threadpoolwinrt.dll", "thumbcache.dll", "timebrokerclient.dll", "timebrokerserver.dll", "timesync.dll", "timesynctask.dll", "tlscsp.dll", "tokenbinding.dll", "tokenbroker.dll", "tokenbrokerui.dll", "tpmcertresources.dll", "tpmcompc.dll", "tpmtasks.dll", "tpmvsc.dll", "tquery.dll", "traffic.dll", "transportdsa.dll", "trie.dll", "trkwks.dll", "tsbyuv.dll", "tscfgwmi.dll", "tserrredir.dll", "tsf3gip.dll", "tsgqec.dll", "tsmf.dll", "tspkg.dll", "tspubwmi.dll", "tssessionux.dll", "tssrvlic.dll", "tsworkspace.dll", "ttdloader.dll", "ttdplm.dll", "ttdrecord.dll", "ttdrecordcpu.dll", "ttlsauth.dll", "ttlscfg.dll", "ttlsext.dll", "tvratings.dll", "twext.dll", "twinapi.dll", "twinui.dll", "txflog.dll", "txfw32.dll", "tzautoupdate.dll", "tzres.dll", "tzsyncres.dll", "ubpm.dll", "ucmhc.dll", "ucrtbase.dll", "ucrtbase_clr0400.dll", "ucrtbase_enclave.dll", "udhisapi.dll", "udwm.dll", "ueficsp.dll", "uexfat.dll", "ufat.dll", "uiamanager.dll", "uianimation.dll", "uiautomationcore.dll", "uicom.dll", "uireng.dll", "uiribbon.dll", "uiribbonres.dll", "ulib.dll", "umb.dll", "umdmxfrm.dll", "umpdc.dll", "umpnpmgr.dll", "umpo-overrides.dll", "umpo.dll", "umpoext.dll", "umpowmi.dll", "umrdp.dll", "unattend.dll", "unenrollhook.dll", "unimdmat.dll", "uniplat.dll", "unistore.dll", "untfs.dll", "updateagent.dll", "updatecsp.dll", "updatepolicy.dll", "upnp.dll", "upnphost.dll", "upshared.dll", "urefs.dll", "urefsv1.dll", "ureg.dll", "url.dll", "urlmon.dll", "usbcapi.dll", "usbceip.dll", "usbmon.dll", "usbperf.dll", "usbpmapi.dll", "usbtask.dll", "usbui.dll", "user32.dll", "usercpl.dll", "userdataservice.dll", "userdatatimeutil.dll", "userenv.dll", "userinitext.dll", "usermgr.dll", "usermgrcli.dll", "usermgrproxy.dll", "usoapi.dll", "usocoreps.dll", "usosvc.dll", "usp10.dll", "ustprov.dll", "utcutil.dll", "utildll.dll", "uudf.dll", "uvcmodel.dll", "uwfcfgmgmt.dll", "uwfcsp.dll", "uwfservicingapi.dll", "uxinit.dll", "uxlib.dll", "uxlibres.dll", "uxtheme.dll", "vac.dll", "van.dll", "vault.dll", "vaultcds.dll", "vaultcli.dll", "vaultroaming.dll", "vaultsvc.dll", "vbsapi.dll", "vbscript.dll", "vbssysprep.dll", "vcardparser.dll", "vdsbas.dll", "vdsdyn.dll", "vdsutil.dll", "vdsvd.dll", "vds_ps.dll", "verifier.dll", "vertdll.dll", "vfuprov.dll", "vfwwdm32.dll", "vhfum.dll", "vid.dll", "videohandlers.dll", "vidreszr.dll", "virtdisk.dll", "vmbuspipe.dll", "vmdevicehost.dll", "vmictimeprovider.dll", "vmrdvcore.dll", "voiprt.dll", "vpnike.dll", "vpnikeapi.dll", "vpnsohdesktop.dll", "vpnv2csp.dll", "vscmgrps.dll", "vssapi.dll", "vsstrace.dll", "vss_ps.dll", "w32time.dll", "w32topl.dll", "waasassessment.dll", "waasmediccapsule.dll", "waasmedicps.dll", "waasmedicsvc.dll", "wabsyncprovider.dll", "walletproxy.dll", "walletservice.dll", "wavemsp.dll", "wbemcomn.dll", "wbiosrvc.dll", "wci.dll", "wcimage.dll", "wcmapi.dll", "wcmcsp.dll", "wcmsvc.dll", "wcnapi.dll", "wcncsvc.dll", "wcneapauthproxy.dll", "wcneappeerproxy.dll", "wcnnetsh.dll", "wcnwiz.dll", "wc_storage.dll", "wdc.dll", "wdi.dll", "wdigest.dll", "wdscore.dll", "webauthn.dll", "webcamui.dll", "webcheck.dll", "webclnt.dll", "webio.dll", "webservices.dll", "websocket.dll", "wecapi.dll", "wecsvc.dll", "wephostsvc.dll", "wer.dll", "werconcpl.dll", "wercplsupport.dll", "werenc.dll", "weretw.dll", "wersvc.dll", "werui.dll", "wevtapi.dll", "wevtfwd.dll", "wevtsvc.dll", "wfapigp.dll", "wfdprov.dll", "wfdsconmgr.dll", "wfdsconmgrsvc.dll", "wfhc.dll", "whealogr.dll", "whhelper.dll", "wiaaut.dll", "wiadefui.dll", "wiadss.dll", "wiarpc.dll", "wiascanprofiles.dll", "wiaservc.dll", "wiashext.dll", "wiatrace.dll", "wificloudstore.dll", "wificonfigsp.dll", "wifidisplay.dll", "wimgapi.dll", "win32spl.dll", "win32u.dll", "winbio.dll", "winbiodatamodel.dll", "winbioext.dll", "winbrand.dll", "wincorlib.dll", "wincredprovider.dll", "wincredui.dll", "windowmanagement.dll", "windowscodecs.dll", "windowscodecsext.dll", "windowscodecsraw.dll", "windowsiotcsp.dll", "windowslivelogin.dll", "winethc.dll", "winhttp.dll", "winhttpcom.dll", "winhvemulation.dll", "winhvplatform.dll", "wininet.dll", "wininetlui.dll", "wininitext.dll", "winipcfile.dll", "winipcsecproc.dll", "winipsec.dll", "winlangdb.dll", "winlogonext.dll", "winmde.dll", "winml.dll", "winmm.dll", "winmmbase.dll", "winmsipc.dll", "winnlsres.dll", "winnsi.dll", "winreagent.dll", "winrnr.dll", "winrscmd.dll", "winrsmgr.dll", "winrssrv.dll", "winrttracing.dll", "winsatapi.dll", "winscard.dll", "winsetupui.dll", "winshfhc.dll", "winsku.dll", "winsockhc.dll", "winsqlite3.dll", "winsrpc.dll", "winsrv.dll", "winsrvext.dll", "winsta.dll", "winsync.dll", "winsyncmetastore.dll", "winsyncproviders.dll", "wintrust.dll", "wintypes.dll", "winusb.dll", "wirednetworkcsp.dll", "wisp.dll", "wkscli.dll", "wkspbrokerax.dll", "wksprtps.dll", "wkssvc.dll", "wlanapi.dll", "wlancfg.dll", "wlanconn.dll", "wlandlg.dll", "wlangpui.dll", "wlanhc.dll", "wlanhlp.dll", "wlanmediamanager.dll", "wlanmm.dll", "wlanmsm.dll", "wlanpref.dll", "wlanradiomanager.dll", "wlansec.dll", "wlansvc.dll", "wlansvcpal.dll", "wlanui.dll", "wlanutil.dll", "wldap32.dll", "wldp.dll", "wlgpclnt.dll", "wlidcli.dll", "wlidcredprov.dll", "wlidfdp.dll", "wlidnsp.dll", "wlidprov.dll", "wlidres.dll", "wlidsvc.dll", "wmadmod.dll", "wmadmoe.dll", "wmalfxgfxdsp.dll", "wmasf.dll", "wmcodecdspps.dll", "wmdmlog.dll", "wmdmps.dll", "wmdrmsdk.dll", "wmerror.dll", "wmi.dll", "wmiclnt.dll", "wmicmiplugin.dll", "wmidcom.dll", "wmidx.dll", "wmiprop.dll", "wmitomi.dll", "wmnetmgr.dll", "wmp.dll", "wmpdui.dll", "wmpdxm.dll", "wmpeffects.dll", "wmphoto.dll", "wmploc.dll", "wmpps.dll", "wmpshell.dll", "wmsgapi.dll", "wmspdmod.dll", "wmspdmoe.dll", "wmvcore.dll", "wmvdecod.dll", "wmvdspa.dll", "wmvencod.dll", "wmvsdecd.dll", "wmvsencd.dll", "wmvxencd.dll", "woftasks.dll", "wofutil.dll", "wordbreakers.dll", "workfoldersgpext.dll", "workfoldersres.dll", "workfoldersshell.dll", "workfolderssvc.dll", "wosc.dll", "wow64.dll", "wow64cpu.dll", "wow64win.dll", "wpbcreds.dll", "wpc.dll", "wpcapi.dll", "wpcdesktopmonsvc.dll", "wpcproxystubs.dll", "wpcrefreshtask.dll", "wpcwebfilter.dll", "wpdbusenum.dll", "wpdshext.dll", "wpdshserviceobj.dll", "wpdsp.dll", "wpd_ci.dll", "wpnapps.dll", "wpnclient.dll", "wpncore.dll", "wpninprc.dll", "wpnprv.dll", "wpnservice.dll", "wpnsruprov.dll", "wpnuserservice.dll", "wpportinglibrary.dll", "wpprecorderum.dll", "wptaskscheduler.dll", "wpx.dll", "ws2help.dll", "ws2_32.dll", "wscapi.dll", "wscinterop.dll", "wscisvif.dll", "wsclient.dll", "wscproxystub.dll", "wscsvc.dll", "wsdapi.dll", "wsdchngr.dll", "wsdprintproxy.dll", "wsdproviderutil.dll", "wsdscanproxy.dll", "wsecedit.dll", "wsepno.dll", "wshbth.dll", "wshcon.dll", "wshelper.dll", "wshext.dll", "wshhyperv.dll", "wship6.dll", "wshqos.dll", "wshrm.dll", "wshtcpip.dll", "wshunix.dll", "wslapi.dll", "wsmagent.dll", "wsmauto.dll", "wsmplpxy.dll", "wsmres.dll", "wsmsvc.dll", "wsmwmipl.dll", "wsnmp32.dll", "wsock32.dll", "wsplib.dll", "wsp_fs.dll", "wsp_health.dll", "wsp_sr.dll", "wtsapi32.dll", "wuapi.dll", "wuaueng.dll", "wuceffects.dll", "wudfcoinstaller.dll", "wudfplatform.dll", "wudfsmcclassext.dll", "wudfx.dll", "wudfx02000.dll", "wudriver.dll", "wups.dll", "wups2.dll", "wuuhext.dll", "wuuhosdeployment.dll", "wvc.dll", "wwaapi.dll", "wwaext.dll", "wwanapi.dll", "wwancfg.dll", "wwanhc.dll", "wwanprotdim.dll", "wwanradiomanager.dll", "wwansvc.dll", "wwapi.dll", "xamltilerender.dll", "xaudio2_8.dll", "xaudio2_9.dll", "xblauthmanager.dll", "xblgamesave.dll", "xblgamesaveext.dll", "xblgamesaveproxy.dll", "xboxgipsvc.dll", "xboxgipsynthetic.dll", "xboxnetapisvc.dll", "xinput1_4.dll", "xinput9_1_0.dll", "xinputuap.dll", "xmlfilter.dll", "xmllite.dll", "xmlprovi.dll", "xolehlp.dll", "xpsgdiconverter.dll", "xpsprint.dll", "xpspushlayer.dll", "xpsrasterservice.dll", "xpsservices.dll", "xwizards.dll", "xwreg.dll", "xwtpdui.dll", "xwtpw32.dll", "zipcontainer.dll", "zipfldr.dll", "bootsvc.dll", "halextintcpsedma.dll", "icsvcvss.dll", "ieproxydesktop.dll", "lsaadt.dll", "nlansp_c.dll", "nrtapi.dll", "opencl.dll", "pfclient.dll", "pnpdiag.dll", "prxyqry.dll", "rdpnanotransport.dll", "servicingcommon.dll", "sortwindows63.dll", "sstpcfg.dll", "tdhres.dll", "umpodev.dll", "utcapi.dll", "windlp.dll", "wow64base.dll", "wow64con.dll", "blbuires.dll", "bpainst.dll", "cbclient.dll", "certadm.dll", "certocm.dll", "certpick.dll", "csdeployres.dll", "dsdeployres.dll", "eapa3hst.dll", "eapacfg.dll", "eapahost.dll", "elsext.dll", "encdump.dll", "escmigplugin.dll", "fsclient.dll", "fsdeployres.dll", "fssminst.dll", "fssmres.dll", "fssprov.dll", "ipamapi.dll", "kpssvc.dll", "lbfoadminlib.dll", "mintdh.dll", "mmci.dll", "mmcico.dll", "mprsnap.dll", "mstsmhst.dll", "mstsmmc.dll", "muxinst.dll", "personax.dll", "rassfm.dll", "rasuser.dll", "rdmsinst.dll", "rdmsres.dll", "rtrfiltr.dll", "sacsvr.dll", "scrdenrl.dll", "sdclient.dll", "sharedstartmodel.dll", "smsrouter.dll", "spwizimg_svr.dll", "sqlcecompact40.dll", "sqlceoledb40.dll", "sqlceqp40.dll", "sqlcese40.dll", "srvmgrinst.dll", "svrmgrnc.dll", "tapisnap.dll", "tlsbrand.dll", "tsec.dll", "tsprop.dll", "tspubiconhelper.dll", "tssdjet.dll", "tsuserex.dll", "ualapi.dll", "ualsvc.dll", "umcres.dll", "updatehandlers.dll", "usocore.dll", "vssui.dll", "wsbappres.dll", "wsbonline.dll", "wsmselpl.dll", "wsmselrr.dll", "xpsfilt.dll", "xpsshhdr.dll"
103    ) and
104    not (
105      (
106        dll.name : "icuuc.dll" and dll.code_signature.subject_name in (
107          "Valve", "Valve Corp.", "Avanquest Software (7270356 Canada Inc)", "Adobe Inc."
108        ) and dll.code_signature.trusted == true
109      ) or
110      (
111        dll.name : ("timeSync.dll", "appInfo.dll") and dll.code_signature.subject_name in (
112          "VMware Inc.", "VMware, Inc."
113        ) and dll.code_signature.trusted == true
114      ) or
115      (
116        dll.name : "libcrypto.dll" and dll.code_signature.subject_name in (
117          "NoMachine S.a.r.l.", "Oculus VR, LLC"
118        ) and dll.code_signature.trusted == true
119      ) or
120      (
121        dll.name : "ucrtbase.dll" and dll.code_signature.subject_name in (
122          "Proofpoint, Inc.", "Rapid7 LLC", "Eclipse.org Foundation, Inc.", "Amazon.com Services LLC", "Windows Phone", "London Jamocha Community CIC", "Palo Alto Networks (Netherlands) B.V.", "Sophos Ltd"
123        ) and dll.code_signature.trusted == true
124      ) or
125      (
126        dll.name : "d3d9.dll" and dll.code_signature.subject_name == "Open Source Developer Alban CLIQUET" and dll.code_signature.trusted == true
127      ) or
128      (
129        dll.name : ("libcrypto.dll", "wmi.dll", "geolocation.dll", "kerberos.dll", "UpdateAgent.dll") and
130        dll.code_signature.subject_name == "Bitdefender SRL" and dll.code_signature.trusted == true
131      ) or
132      (dll.name : "ICMP.dll" and dll.code_signature.subject_name == "Paessler AG" and dll.code_signature.trusted == true) or
133      (dll.name : "dbghelp.dll" and dll.code_signature.trusted == true) or
134      (dll.name : "DirectML.dll" and dll.code_signature.subject_name == "Adobe Inc." and dll.code_signature.trusted == true) or
135      (dll.name : "icsvc.dll" and dll.code_signature.subject_name in ("Dell Inc", "Dell Technologies Inc.") and dll.code_signature.trusted == true) or
136      (dll.name : "offreg.dll" and dll.code_signature.subject_name in ("Malwarebytes Inc.", "Malwarebytes Inc") and dll.code_signature.trusted == true) or
137      (dll.name : ("AppMgr.dll", "icuuc.dll") and dll.code_signature.subject_name in ("Autodesk, Inc", "Autodesk, Inc.") and dll.code_signature.trusted == true) or
138      (dll.name : ("SsShim.dll", "Msi.dll", "wdscore.dll") and process.name : "DismHost.exe" and dll.path : "C:\\Windows\\Temp\\*") or
139      (dll.code_signature.trusted == true and 
140       dll.code_signature.subject_name in (
141        "ALIBABA CLOUD COMPUTING LTD", 
142        "Epic Systems Corporation", 
143        "Google LLC",
144        "Agilysys, Inc.", 
145        "CD PROJEKT S.A.", 
146        "Check Point Software Technologies Ltd.", 
147        "Dedalus Italia S.P.A.", 
148        "AOMEI International Network Limited", 
149        "CHENGDU AOMEI TECHNOLOGY CO., LTD.", 
150        "GN Hearing A/S", 
151        "Paessler GmbH", 
152        "Symantec Corporation")) or
153      (
154        dll.path : (
155          "?:\\Windows\\SystemApps\\*\\dxgi.dll",
156          "?:\\Windows\\SystemApps\\*\\wincorlib.dll",
157          "?:\\Windows\\dxgi.dll",
158          "?:\\Users\\*\\AppData\\Local\\LINE\\bin\\current\\dbghelp.dll", 
159          "?:\\Program Files (x86)\\SAP\\FrontEnd\\SAPgui\\dbghelp.dll", 
160          "?:\\Program Files (x86)\\Common Files\\Crystal Decision\\2.0\\bin\\atl.dll"
161        )
162      )
163    )
164'''
165
166
167[[rule.threat]]
168framework = "MITRE ATT&CK"
169
170[[rule.threat.technique]]
171id = "T1036"
172name = "Masquerading"
173reference = "https://attack.mitre.org/techniques/T1036/"
174
175[[rule.threat.technique.subtechnique]]
176id = "T1036.001"
177name = "Invalid Code Signature"
178reference = "https://attack.mitre.org/techniques/T1036/001/"
179
180[[rule.threat.technique.subtechnique]]
181id = "T1036.005"
182name = "Match Legitimate Resource Name or Location"
183reference = "https://attack.mitre.org/techniques/T1036/005/"
184
185[[rule.threat.technique]]
186id = "T1553"
187name = "Subvert Trust Controls"
188reference = "https://attack.mitre.org/techniques/T1553/"
189
190[[rule.threat.technique.subtechnique]]
191id = "T1553.002"
192name = "Code Signing"
193reference = "https://attack.mitre.org/techniques/T1553/002/"
194
195[[rule.threat.technique]]
196id = "T1574"
197name = "Hijack Execution Flow"
198reference = "https://attack.mitre.org/techniques/T1574/"
199
200[[rule.threat.technique.subtechnique]]
201id = "T1574.001"
202name = "DLL"
203reference = "https://attack.mitre.org/techniques/T1574/001/"
204
205[rule.threat.tactic]
206id = "TA0005"
207name = "Defense Evasion"
208reference = "https://attack.mitre.org/tactics/TA0005/"
209
210[[rule.threat]]
211framework = "MITRE ATT&CK"
212
213[[rule.threat.technique]]
214id = "T1554"
215name = "Compromise Host Software Binary"
216reference = "https://attack.mitre.org/techniques/T1554/"
217
218[rule.threat.tactic]
219id = "TA0003"
220name = "Persistence"
221reference = "https://attack.mitre.org/tactics/TA0003/"

Triage and analysis

Investigating Potential Masquerading as System32 DLL

This rule fires when a DLL with a name matching a known Windows System32 library is loaded from an unexpected path, is unsigned or signed by a non-Microsoft certificate, and was recently created or modified (within the last hour). This pattern is consistent with DLL Search Order Hijacking, DLL planting, or backdooring/resigning of legitimate system DLLs — all common defense evasion and persistence techniques used by both commodity malware and sophisticated threat actors.

Possible investigation steps

  • Examine the full dll.path to determine where the suspicious DLL was loaded from. Paths under user-writable directories (AppData, Temp, Downloads, ProgramData) or application directories are high-fidelity indicators.
  • Review dll.code_signature fields — check whether the DLL is unsigned, self-signed, or signed by an unexpected publisher. A trusted signature from a legitimate vendor may indicate a false positive; an invalid or absent signature warrants deeper investigation.
  • Check dll.Ext.relative_file_creation_time and dll.Ext.relative_file_name_modify_time — a DLL dropped and loaded within seconds or minutes of each other strongly suggests staged execution.
  • Identify the loading process (process.name, process.executable, process.pid) and examine its parent chain for unusual ancestry (e.g. Office spawning a loader, or a browser dropping a DLL).
  • Retrieve the DLL and hash it with Get-FileHash -Algorithm SHA256. Search the hash across VirusTotal, Hybrid-Analysis, MalwareBazaar, and CISCO Talos.
  • Check whether other hosts in the environment have loaded the same DLL path or hash — a single host is likely targeted or hands-on, widespread hits may indicate a worm or supply chain issue.
  • Correlate with process creation events around the same timestamp to identify what dropped the DLL (downloaders, document macros, installers, etc.).
  • Inspect the directory containing the DLL for other recently created files, scripts, or executables that may be part of the same drop.

False positive analysis

  • Legitimate third-party software occasionally ships DLLs with names that collide with System32 libraries (e.g. security vendors, game engines, virtualization software, and enterprise tooling). Validate the publisher via dll.code_signature.subject_name and cross-reference against known software installed on the host.
  • Installer and update workflows may briefly stage DLLs in temp paths before moving them to their final location — check whether the loading process is a known installer (msiexec.exe, setup.exe, vendor updaters) and whether the DLL path disappears after a short window.
  • DismHost.exe staging certain DLLs under C:\Windows\Temp\ during servicing operations is a known benign pattern already excluded in the query.
  • Suspicious DLL Loaded for Persistence via Desktop File - c4818812-d44f-47be-aaef-4cfb2f9cc799
  • Suspicious Process from Conhost - 28896382-7d4f-4d50-9b72-67091901fd26
  • Potential DLL Side-Loading via Trusted Microsoft Programs - 1160dcdb-0a0a-4a79-91d8-9b84af7e0240

Response and remediation

  • Initiate the incident response process based on triage outcome. If the DLL is confirmed malicious, treat the host as compromised.
  • Isolate the affected host and preserve a memory dump and disk image before remediation to retain forensic evidence.
  • Delete the malicious DLL and any associated files identified during investigation.
  • If DLL Search Order Hijacking is confirmed, identify the vulnerable application and remediate by patching, applying a safe DLL search mode (HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\SafeDllSearchMode), or restricting write permissions on directories in the application's search path.
  • If a legitimate binary was backdoored and resigned, treat all binaries delivered via the same channel as suspect and investigate the supply chain.
  • Block identified file hashes and signer certificates as appropriate at the endpoint and perimeter.
  • Hunt for lateral movement or persistence mechanisms established after the DLL was loaded — check scheduled tasks, services, registry run keys, and WMI subscriptions created around the same timeframe.
  • Determine the initial access vector and remediate to prevent reinfection.

Related rules

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