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 = "2026/09/18"
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 "Noise: Medium",
71 "Performance: Normal",
72 "Profile: Recommended",
73 "Threat: Masquerading",
74 "Rule Type: Event Correlation (EQL)",
75 "Platform: Windows",
76]
77timestamp_override = "event.ingested"
78type = "eql"
79
80query = '''
81library where host.os.type == "windows" and event.action == "load" and
82(dll.Ext.relative_file_creation_time <= 3600 or dll.Ext.relative_file_name_modify_time <= 3600) and
83 not (
84 dll.path : (
85 "?:\\Windows\\System32\\*",
86 "?:\\Windows\\SysWOW64\\*",
87 "?:\\Windows\\SystemTemp\\*",
88 "?:\\$WINDOWS.~BT\\NewOS\\Windows\\WinSxS\\*",
89 "?:\\$WINDOWS.~BT\\NewOS\\Windows\\System32\\*",
90 "?:\\$WINDOWS.~BT\\Sources\\*",
91 "?:\\$WINDOWS.~BT\\Work\\*",
92 "?:\\Windows\\WinSxS\\*",
93 "?:\\Windows\\SoftwareDistribution\\Download\\*",
94 "?:\\Windows\\assembly\\NativeImages_v*"
95 )
96 ) and
97 not (
98 dll.code_signature.subject_name in (
99 "Microsoft Windows",
100 "Microsoft Corporation",
101 "Microsoft Windows Hardware Abstraction Layer Publisher",
102 "Microsoft Windows Publisher",
103 "Microsoft Windows 3rd party Component",
104 "Microsoft 3rd Party Application Component"
105 ) and dll.code_signature.trusted == true
106 ) and not dll.code_signature.status : ("errorCode_endpoint*", "errorUntrustedRoot", "errorChaining") and
107 dll.name : (
108 "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"
109 ) and
110 not (
111 (
112 dll.name : "icuuc.dll" and dll.code_signature.subject_name in (
113 "Valve", "Valve Corp.", "Avanquest Software (7270356 Canada Inc)", "Adobe Inc."
114 ) and dll.code_signature.trusted == true
115 ) or
116 (
117 dll.name : ("timeSync.dll", "appInfo.dll") and dll.code_signature.subject_name in (
118 "VMware Inc.", "VMware, Inc.", "Broadcom Inc"
119 ) and dll.code_signature.trusted == true
120 ) or
121 (
122 dll.name : "libcrypto.dll" and dll.code_signature.subject_name in (
123 "NoMachine S.a.r.l.", "Oculus VR, LLC"
124 ) and dll.code_signature.trusted == true
125 ) or
126 (
127 dll.name : "ucrtbase.dll" and dll.code_signature.subject_name in (
128 "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"
129 ) and dll.code_signature.trusted == true
130 ) or
131 (
132 dll.name : "d3d9.dll" and dll.code_signature.subject_name == "Open Source Developer Alban CLIQUET" and dll.code_signature.trusted == true
133 ) or
134 (
135 dll.name : ("libcrypto.dll", "wmi.dll", "geolocation.dll", "kerberos.dll", "UpdateAgent.dll") and
136 dll.code_signature.subject_name == "Bitdefender SRL" and dll.code_signature.trusted == true
137 ) or
138 (dll.name : "ICMP.dll" and dll.code_signature.subject_name == "Paessler AG" and dll.code_signature.trusted == true) or
139 (dll.name : "dbghelp.dll" and dll.code_signature.trusted == true) or
140 (dll.name : "DirectML.dll" and dll.code_signature.subject_name == "Adobe Inc." and dll.code_signature.trusted == true) or
141 (dll.name : "icsvc.dll" and dll.code_signature.subject_name in ("Dell Inc", "Dell Technologies Inc.") and dll.code_signature.trusted == true) or
142 (dll.name : "offreg.dll" and dll.code_signature.subject_name in ("Malwarebytes Inc.", "Malwarebytes Inc") and dll.code_signature.trusted == true) or
143 (dll.name : ("AppMgr.dll", "icuuc.dll") and dll.code_signature.subject_name in ("Autodesk, Inc", "Autodesk, Inc.") and dll.code_signature.trusted == true) or
144 (dll.name : ("SsShim.dll", "Msi.dll", "wdscore.dll") and process.name : "DismHost.exe" and dll.path : "C:\\Windows\\Temp\\*") or
145 (dll.code_signature.trusted == true and
146 dll.code_signature.subject_name in (
147 "ALIBABA CLOUD COMPUTING LTD",
148 "Epic Systems Corporation",
149 "Google LLC",
150 "Agilysys, Inc.",
151 "CD PROJEKT S.A.",
152 "Check Point Software Technologies Ltd.",
153 "Dedalus Italia S.P.A.",
154 "AOMEI International Network Limited",
155 "CHENGDU AOMEI TECHNOLOGY CO., LTD.",
156 "GN Hearing A/S",
157 "Paessler GmbH",
158 "Symantec Corporation")) or
159 (
160 dll.path : (
161 "?:\\Windows\\SystemApps\\*\\dxgi.dll",
162 "?:\\Windows\\SystemApps\\*\\wincorlib.dll",
163 "?:\\Windows\\dxgi.dll",
164 "?:\\Users\\*\\AppData\\Local\\LINE\\bin\\current\\dbghelp.dll",
165 "?:\\Program Files (x86)\\SAP\\FrontEnd\\SAPgui\\dbghelp.dll",
166 "?:\\Program Files (x86)\\Common Files\\Crystal Decision\\2.0\\bin\\atl.dll"
167 )
168 )
169 )
170'''
171
172
173[[rule.threat]]
174framework = "MITRE ATT&CK"
175
176[[rule.threat.technique]]
177id = "T1036"
178name = "Masquerading"
179reference = "https://attack.mitre.org/techniques/T1036/"
180
181[[rule.threat.technique.subtechnique]]
182id = "T1036.001"
183name = "Invalid Code Signature"
184reference = "https://attack.mitre.org/techniques/T1036/001/"
185
186[[rule.threat.technique.subtechnique]]
187id = "T1036.005"
188name = "Match Legitimate Resource Name or Location"
189reference = "https://attack.mitre.org/techniques/T1036/005/"
190
191[[rule.threat.technique]]
192id = "T1553"
193name = "Subvert Trust Controls"
194reference = "https://attack.mitre.org/techniques/T1553/"
195
196[[rule.threat.technique.subtechnique]]
197id = "T1553.002"
198name = "Code Signing"
199reference = "https://attack.mitre.org/techniques/T1553/002/"
200
201[[rule.threat.technique]]
202id = "T1574"
203name = "Hijack Execution Flow"
204reference = "https://attack.mitre.org/techniques/T1574/"
205
206[[rule.threat.technique.subtechnique]]
207id = "T1574.001"
208name = "DLL"
209reference = "https://attack.mitre.org/techniques/T1574/001/"
210
211[rule.threat.tactic]
212id = "TA0005"
213name = "Defense Evasion"
214reference = "https://attack.mitre.org/tactics/TA0005/"
215
216[[rule.threat]]
217framework = "MITRE ATT&CK"
218
219[[rule.threat.technique]]
220id = "T1554"
221name = "Compromise Host Software Binary"
222reference = "https://attack.mitre.org/techniques/T1554/"
223
224[rule.threat.tactic]
225id = "TA0003"
226name = "Persistence"
227reference = "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.pathto 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_signaturefields — 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_timeanddll.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_nameand 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.
Related rules
- 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
- Persistence via a Windows Installer
- Potential Windows Error Manager Masquerading
- Program Files Directory Masquerading
- Adding Hidden File Attribute via Attrib
- Command Obfuscation via Unicode Modifier Letters