Detects when attackers or tools disable Windows Defender functionalities via the Windows registry

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Detects potential COM object hijacking via modification of default system CLSID.

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Detects registry modifications that change features of internal Windows tools (malware like Agent Tesla uses this technique)

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Detects changes to the Netsh registry key to add a new DLL value that is located on a suspicious location. This change might be an indication of a potential persistence attempt by adding a malicious Netsh helper

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Detects changes to the Netsh registry key to add a new DLL value. This change might be an indication of a potential persistence attempt by adding a malicious Netsh helper

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Detects usage of Windows Input Method Editor (IME) keyboard layout feature, which allows an attacker to load a DLL into the process after sending the WM_INPUTLANGCHANGEREQUEST message. Before doing this, the client needs to register the DLL in a special registry key that is assumed to implement this keyboard layout. This registry key should store a value named "Ime File" with a DLL path. IMEs are essential for languages that have more characters than can be represented on a standard keyboard, such as Chinese, Japanese, and Korean.

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Detects installation of new shim databases that try to patch sections of known processes for potential process injection or persistence.

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Detects usage of Windows Input Method Editor (IME) keyboard layout feature, which allows an attacker to load a DLL into the process after sending the WM_INPUTLANGCHANGEREQUEST message. Before doing this, the client needs to register the DLL in a special registry key that is assumed to implement this keyboard layout. This registry key should store a value named "Ime File" with a DLL path. IMEs are essential for languages that have more characters than can be represented on a standard keyboard, such as Chinese, Japanese, and Korean.

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Detects the enabling of the PowerShell script execution policy. Once enabled, this policy allows scripts to be executed.

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Detects activity that indicates a user disabling the ability for Antivirus mini filter to inspect a "Dev Drive".

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Detects modifications to the registry key "HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\Userlist" where the value is set to "0" in order to hide user account from being listed on the logon screen.

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Detects changes to the registry value "PythonFunctionWarnings" that would prevent any warnings or alerts from showing when Python functions are about to be executed. Threat actors could run malicious code through the new Microsoft Excel feature that allows Python to run within the spreadsheet.

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Detects changes to the "DisableRestrictedAdmin" registry value in order to disable or enable RestrictedAdmin mode. RestrictedAdmin mode prevents the transmission of reusable credentials to the remote system to which you connect using Remote Desktop. This prevents your credentials from being harvested during the initial connection process if the remote server has been compromise

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Detects changes to the "HVCIDisallowedImages" registry value to potentially add a driver to the list, in order to prevent it from loading.

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Detect set Notification_Suppress to 1 to disable the Windows security center notification

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Detects when an attacker adds a new "Debugger" value to the "AeDebug" key in order to achieve persistence which will get invoked when an application crashes

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Detects when an attacker adds a new "Debugger" value to the "Hangs" key in order to achieve persistence which will get invoked when an application crashes

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Detect set DisallowRun to 1 to prevent user running specific computer program

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Adversaries may use port monitors to run an attacker supplied DLL during system boot for persistence or privilege escalation. A port monitor can be set through the AddMonitor API call to set a DLL to be loaded at startup.

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Detect enable rdp feature to allow specific user to rdp connect on the targeted machine

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BlackByte set three different registry values to escalate privileges and begin setting the stage for lateral movement and encryption

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Attempts to detect system changes made by Blue Mockingbird

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Bypasses User Account Control using a fileless method

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Bypasses User Account Control using Event Viewer and a relevant Windows Registry modification

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Detects the setting of the environement variable "windir" to a non default value. Attackers often abuse this variable in order to trigger a UAC bypass via the "SilentCleanup" task. The SilentCleanup task located in %windir%\system32\cleanmgr.exe is an auto-elevated task that can be abused to elevate any file with administrator privileges without prompting UAC.

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Detect possible persistence using Fax DLL load when service restart

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Detect change of the user account associated with the FAX service to avoid the escalation problem.

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Detects tampering with the "ChannelAccess" registry key in order to change access to Windows event channel.

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Detects modification of autostart extensibility point (ASEP) in registry.

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Detects changes to the ClickOnce trust prompt registry key in order to enable an installation from different locations such as the Internet.

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Detects changes to 'HKCU\Software\Classes\Folder\shell\open\command\DelegateExecute'

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Detect modification of TreatAs key to enable "rundll32.exe -sta" command

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Detects modification of autostart extensibility point (ASEP) in registry.

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Detects disabling the CrashDump per registry (as used by HermeticWiper)

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Detects modification of autostart extensibility point (ASEP) in registry.

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Detects modification of autostart extensibility point (ASEP) in registry.

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Detects modification of autostart extensibility point (ASEP) in registry.

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Detects the abuse of custom file open handler, executing powershell

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Detects changes to the default RDP port. Remote desktop is a common feature in operating systems. It allows a user to log into a remote system using an interactive session with a graphical user interface. Microsoft refers to its implementation of the Remote Desktop Protocol (RDP) as Remote Desktop Services (RDS).

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Detects the installation of a Callout DLL via CalloutDlls and CalloutEnabled parameter in Registry, which can be used to execute code in context of the DHCP server (restart required)

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Detects changes to "DsrmAdminLogonBehavior" registry value. During a Domain Controller (DC) promotion, administrators create a Directory Services Restore Mode (DSRM) local administrator account with a password that rarely changes. The DSRM account is an “Administrator” account that logs in with the DSRM mode when the server is booting up to restore AD backups or recover the server from a failure. Attackers could abuse DSRM account to maintain their persistence and access to the organization's Active Directory. If the "DsrmAdminLogonBehavior" value is set to "0", the administrator account can only be used if the DC starts in DSRM. If the "DsrmAdminLogonBehavior" value is set to "1", the administrator account can only be used if the local AD DS service is stopped. If the "DsrmAdminLogonBehavior" value is set to "2", the administrator account can always be used.

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Administrative shares are hidden network shares created by Microsoft Windows NT operating systems that grant system administrators remote access to every disk volume on a network-connected system

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Detects disabling Windows Defender Exploit Guard Network Protection

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Detects tampering with the MacroRuntimeScanScope registry key to disable runtime scanning of enabled macros

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Adversaries may disable or modify system firewalls in order to bypass controls limiting network usage

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Detects registry modifications that disable Privacy Settings Experience

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Detects disabling Windows Defender PUA protection

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Detects disabling Windows Defender Tamper Protection

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Detects tampering with the "Enabled" registry key in order to disable Windows logging of a Windows event channel

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Detect set EnableFirewall to 0 to disable the Windows firewall

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Detect set UseActionCenterExperience to 0 to disable the Windows security center notification

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Detects the disabling of the Windows Defender eventlog as seen in relation to Lockbit 3.0 infections

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Detects modifications to the "Hidden" and "ShowSuperHidden" explorer registry values in order to disable showing of hidden files and system files. This technique is abused by several malware families to hide their files from normal users.

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Detects when a user enables DNS-over-HTTPS. This can be used to hide internet activity or be used to hide the process of exfiltrating data. With this enabled organization will lose visibility into data such as query type, response and originating IP that are used to determine bad actors.

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Detects changes to the "NoLMHash" registry value in order to allow Windows to store LM Hashes. By setting this registry value to "0" (DWORD), Windows will be allowed to store a LAN manager hash of your password in Active Directory and local SAM databases.

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Detects changes to the AppInstaller (winget) policy. Specifically the activation of the local manifest installation, which allows a user to install new packages via custom manifests.

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Enable Dynamic Data Exchange protocol (DDE) in all supported editions of Microsoft Word or Excel.

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Detects .NET Framework CLR and .NET Core CLR "cor_enable_profiling" and "cor_profiler" variables being set and configured.

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Detects changes to the "ExtErrorInformation" key in order to disable ETW logging for rpcrt4.dll

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Detects changes to the "TracingDisabled" key in order to disable ETW logging for services.exe (SCM)

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Potential adversaries stopping ETW providers recording loaded .NET assemblies.

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This rule detects that the path to the DLL written in the registry is different from the default one. Launched WAB.exe tries to load the DLL from Registry.

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Detects when the "index" value of a scheduled task is modified from the registry Which effectively hides it from any tooling such as "schtasks /query" (Read the referenced link for more information about the effects of this technique)

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Detects changes to the HypervisorEnforcedCodeIntegrity registry key and the "Enabled" value being set to 0 in order to disable the Hypervisor Enforced Code Integrity feature. This allows an attacker to load unsigned and untrusted code to be run in the kernel

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Detects changes to the "DisableHypervisorEnforcedPagingTranslation" registry value. Where the it is set to "1" in order to disable the Hypervisor Enforced Paging Translation feature.

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Hides the file extension through modification of the registry

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Detects changes to Internet Explorer's (IE / Windows Internet properties) ZoneMap configuration of the "HTTP" and "HTTPS" protocols to point to the "My Computer" zone. This allows downloaded files from the Internet to be granted the same level of trust as files stored locally.

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Detects modification of autostart extensibility point (ASEP) in registry.

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Detects changes to the Internet Explorer "DisableFirstRunCustomize" value, which prevents Internet Explorer from running the first run wizard the first time a user starts the browser after installing Internet Explorer or Windows.

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Detects setting a custom URL for OneDriveStandaloneUpdater.exe to download a file from the Internet without executing any anomalous executables with suspicious arguments. The downloaded file will be in C:\Users\redacted\AppData\Local\Microsoft\OneDrive\StandaloneUpdaterreSignInSettingsConfig.json

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Detects the setting of the "DumpType" registry value to "2" which stands for a "Full Dump". Technique such as LSASS Shtinkering requires this value to be "2" in order to dump LSASS.

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Detects registry changes to Office trust records where the path is located in a potentially suspicious location

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Detects changes to the "MaxMpxCt" registry value. MaxMpxCt specifies the maximum outstanding network requests for the server per client, which is used when negotiating a Server Message Block (SMB) connection with a client. Note if the value is set beyond 125 older Windows 9x clients will fail to negotiate. Ransomware threat actors and operators (specifically BlackCat) were seen increasing this value in order to handle a higher volume of traffic.

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Detects changes to Microsoft Office protected view registry keys with which the attacker disables this feature.

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Detects modification of the registry settings used for Internet Explorer and other Windows components that use these settings. An attacker can abuse this registry key to add a domain to the trusted sites Zone or insert javascript for persistence

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Detect modification of the startup key to a path where a payload could be stored to be launched during startup

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Detects changes to the NGenAssemblyUsageLog registry key. .NET Usage Log output location can be controlled by setting the NGenAssemblyUsageLog CLR configuration knob in the Registry or by configuring an environment variable (as described in the next section). By simplify specifying an arbitrary value (e.g. fake output location or junk data) for the expected value, a Usage Log file for the .NET execution context will not be created.

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A General detection for a new application in AppCompat. This indicates an application executing for the first time on an endpoint.

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Detects setting of a new registry database value related to BgInfo configuration. Attackers can for example set this value to save the results of the commands executed by BgInfo in order to exfiltrate information.

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Detects setting of a new registry value related to BgInfo configuration, which can be abused to execute custom VBScript via "BgInfo.exe"

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Detects setting of a new registry value related to BgInfo configuration, which can be abused to execute custom WMI query via "BgInfo.exe"

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Detects the installation of a DNS plugin DLL via ServerLevelPluginDll parameter in registry, which can be used to execute code in context of the DNS server (restart required)

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Detects the abuse of the exefile handler in new file association. Used for bypass of security products.

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Detects the registration of a new ODBC driver.

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Detects the addition of new root, CA or AuthRoot certificates to the Windows registry

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Detects suspicious new RUN key element pointing to an executable in a suspicious folder

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Detects processes setting a new DLL in DllName in under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProvider. Adversaries may abuse time providers to execute DLLs when the system boots. The Windows Time service (W32Time) enables time synchronization across and within domains.

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Detects modification of autostart extensibility point (ASEP) in registry.

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Detects registry changes to Microsoft Office "VBAWarning" to a value of "1" which enables the execution of all macros, whether signed or unsigned.

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Detects applications or users re-enabling old TLS versions by setting the "Enabled" value to "1" for the "Protocols" registry key.

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Detects an attacker trying to enable the outlook security setting "EnableUnsafeClientMailRules" which allows outlook to run applications or execute macros

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Detects the modification of Outlook security setting to allow unprompted execution of macros.

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Detects changes to the registry values related to outlook security settings

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Detects the enabling of the "EnablePeriodicBackup" registry value. Once enabled, The OS will backup System registry hives on restarts to the "C:\Windows\System32\config\RegBack" folder. Windows creates a "RegIdleBackup" task to manage subsequent backups. Registry backup was a default behavior on Windows and was disabled as of "Windows 10, version 1803".

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Detects when an attacker modifies values of the Disk Cleanup Handler in the registry to achieve persistence via autorun. The disk cleanup manager is part of the operating system. It displays the dialog box […] The user has the option of enabling or disabling individual handlers by selecting or clearing their check box in the disk cleanup manager's UI. Although Windows comes with a number of disk cleanup handlers, they aren't designed to handle files produced by other applications. Instead, the disk cleanup manager is designed to be flexible and extensible by enabling any developer to implement and register their own disk cleanup handler. Any developer can extend the available disk cleanup services by implementing and registering a disk cleanup handler.

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Detects when an attacker modifies the registry value of the "hhctrl" to point to a custom binary

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Detects when an attacker register a new SIP provider for persistence and defense evasion

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Detects changes to the AMSI come server registry key in order disable AMSI scanning functionalities. When AMSI attempts to starts its COM component, it will query its registered CLSID and return a non-existent COM server. This causes a load failure and prevents any scanning methods from being accessed, ultimately rendering AMSI useless

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Detects tampering with attachment manager settings policies associations to lower the default file type risks (See reference for more information)

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Detects tampering with attachment manager settings policies attachments (See reference for more information)

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Detects tampering with autologger trace sessions which is a technique used by attackers to disable logging

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Detects known malicious service installs that appear in cases in which a Cobalt Strike beacon elevates privileges or lateral movement.

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Detects when an attacker tries to add a new network provider in order to dump clear text credentials, similar to how the NPPSpy tool does it

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Detects tampering with EventLog service "file" key. In order to change the default location of an Evtx file. This technique is used to tamper with log collection and alerting

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Detect changes to the "PendingFileRenameOperations" registry key from uncommon or suspicious images locations to stage currently used files for rename or deletion after reboot.

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Detects potential persistence using Appx DebugPath

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Detects changes to the "Default" property for keys located in the \Software\Microsoft\Windows\CurrentVersion\App Paths\ registry. Which might be used as a method of persistence The entries found under App Paths are used primarily for the following purposes. First, to map an application's executable file name to that file's fully qualified path. Second, to prepend information to the PATH environment variable on a per-application, per-process basis.

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Detects the setting of the REGISTERAPPRESTART compatibility layer on an application. This compatibility layer allows an application to register for restart using the "RegisterApplicationRestart" API. This can be potentially abused as a persistence mechanism.

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Detects change the the "AutodialDLL" key which could be used as a persistence method to load custom DLL via the "ws2_32" library

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Detects when an attacker modifies the registry key "HtmlHelp Author" to achieve persistence

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Detects potential persistence activity via the registering of a new custom protocole handlers. While legitimate applications register protocole handlers often times during installation. And attacker can abuse this by setting a custom handler to be used as a persistence mechanism.

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Detects when an attacker adds a new "DLLPathOverride" value to the "Natural Language" key in order to achieve persistence which will get invoked by "SearchIndexer.exe" process

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Detects potential registry persistence technique using the Event Viewer "Events.asp" technique

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Detect potential persistence via the creation of an excel add-in (XLL) file to make it run automatically when Excel is started.

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Detects registry persistence technique using the GlobalFlags and SilentProcessExit keys

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Detects when an attacker modifies the "REG_MULTI_SZ" value named "Extensions" to include a custom DLL to achieve persistence via lsass. The "Extensions" list contains filenames of DLLs being automatically loaded by lsass.exe. Each DLL has its InitializeLsaExtension() method called after loading.

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Detects when an attacker register a new SIP provider for persistence and defense evasion

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Detects modification to the "Default" value of the "MyComputer" key and subkeys to point to a custom binary that will be launched whenever the associated action is executed (see reference section for example)

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Detects potential persistence activity via outlook home page. An attacker can set a home page to achieve code execution and persistence by editing the WebView registry keys.

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Detects the modification of Outlook setting "LoadMacroProviderOnBoot" which if enabled allows the automatic loading of any configured VBA project/module

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Detects potential persistence activity via outlook today page. An attacker can set a custom page to execute arbitrary code and link to it via the registry values "URL" and "UserDefinedUrl".

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Detect use of scrobj.dll as this DLL looks for the ScriptletURL key to get the location of the script to execute

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Detects the installation of a new shim database where the file is located in a non-default location

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Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by application shims. The Microsoft Windows Application Compatibility Infrastructure/Framework (Application Shim) was created to allow for backward compatibility of software as the operating system codebase changes over time

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Detects modification addition to the 'TypedPaths' key in the user or admin registry from a non standard application. Which might indicate persistence attempt

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Detects persistence via Visual Studio Tools for Office (VSTO) add-ins in Office applications.

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Detects changes to the PowerShell execution policy in order to bypass signing requirements for script execution

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Detects potential abuse of the provisioning registry key for indirect command execution through "Provlaunch.exe".

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Detects changes to the PSFactory COM InProcServer32 registry. This technique was used by RomCom to create persistence storing a malicious DLL.

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Detect changes to the "LegalNoticeCaption" or "LegalNoticeText" registry values where the message set contains keywords often used in ransomware ransom messages

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Detects the addition of the "Debugger" value to the "DbgManagedDebugger" key in order to achieve persistence. Which will get invoked when an application crashes

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Detects potential persistence behavior using the windows telemetry registry key. Windows telemetry makes use of the binary CompatTelRunner.exe to run a variety of commands and perform the actual telemetry collections. This binary was created to be easily extensible, and to that end, it relies on the registry to instruct on which commands to run. The problem is, it will run any arbitrary command without restriction of location or type.

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Detects potentially suspicious changes to the SentinelOne context menu scan command by a process other than SentinelOne.

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Detects when the enablement of developer features such as "Developer Mode" or "Application Sideloading". Which allows the user to install untrusted packages.

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Detects potential WerFault "ReflectDebugger" registry value abuse for persistence.

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Detects registry value settings that would replace the user's desktop background. This is a common technique used by malware to change the desktop background to a ransom note or other image.

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Detects the registration of a new ODBC driver where the driver is located in a potentially suspicious location

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Detects that a powershell code is written to the registry as a service.

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Detects changes to the registry for the currently logged-in user. In order to disable PowerShell module logging, script block logging or transcription and script execution logging

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Detects tampering of RDP Terminal Service/Server sensitive settings. Such as allowing unauthorized users access to a system via the 'fAllowUnsolicited' or enabling RDP via 'fDenyTSConnections'...etc

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Detects tampering of RDP Terminal Service/Server sensitive settings. Such as allowing unauthorized users access to a system via the 'fAllowUnsolicited' or enabling RDP via 'fDenyTSConnections', etc.

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Detects when an attacker registers a new IFilter for an extension. Microsoft Windows Search uses filters to extract the content of items for inclusion in a full-text index. You can extend Windows Search to index new or proprietary file types by writing filters to extract the content, and property handlers to extract the properties of files.

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Detects the modification of the registry to disable a system restore on the computer

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Detects registry modifications that disable internal tools or functions in explorer (malware like Agent Tesla uses this technique)

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Detects registry modifications that hide internal tools or functions from the user (malware like Agent Tesla, Hermetic Wiper uses this technique)

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Hides the file extension through modification of the registry

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Detects a possible persistence mechanism using RUN key for Windows Explorer and pointing to a suspicious folder

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Detects the modification of the registry to allow a driver or service to persist in Safe Mode.

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Running Chrome VPN Extensions via the Registry install 2 vpn extension

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Monitor the creation of a new key under 'TaskCache' when a new scheduled task is registered by a process that is not svchost.exe, which is suspicious

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Detects registry key established after masqueraded .scr file execution using Rundll32 through desk.cpl

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Detects enabling TurnOffCheck which can be used to bypass defense of MSDT Follina vulnerability

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Detect the creation of a service with a service binary located in a suspicious directory

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Detects changes to the "ServiceDLL" value related to a service in the registry. This is often used as a method of persistence.

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Detects modification of autostart extensibility point (ASEP) in registry.

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Detects applications being added to the "allowed applications" list of exploit guard in order to bypass controlled folder settings

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Detects the creation of user-specific or system-wide environment variables via the registry. Which contains suspicious commands and strings

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Detects the keyboard preload installation with a suspicious keyboard layout, e.g. Chinese, Iranian or Vietnamese layout load in user session on systems maintained by US staff only

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Detects potential PowerShell commands or code within registry run keys

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Detects a suspicious printer driver installation with an empty Manufacturer value

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Detects installation of NalDrv or PROCEXP152 services via registry-keys to non-system32 folders. Both services are used in the tool Ghost-In-The-Logs (https://github.com/bats3c/Ghost-In-The-Logs), which uses KDU (https://github.com/hfiref0x/KDU)

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Detects changes in Sysmon driver altitude value. If the Sysmon driver is configured to load at an altitude of another registered service, it will fail to load at boot.

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Detects modification of autostart extensibility point (ASEP) in registry.

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Detects tamper attempts to sophos av functionality via registry key modification

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Detects registry changes to Microsoft Office "AccessVBOM" to a value of "1" which disables trust access for VBA on the victim machine and lets attackers execute malicious macros without any Microsoft Office warnings.

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Detects the pattern of UAC Bypass using a path parsing issue in winsat.exe (UACMe 52)

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Detects the pattern of UAC Bypass using Windows Media Player osksupport.dll (UACMe 32)

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Detects UAC bypass method using Windows event viewer

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Detects the pattern of UAC Bypass using registry key manipulation of sdclt.exe (e.g. UACMe 53)

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Detects when an attacker tries to disable User Account Control (UAC) by setting the registry value "EnableLUA" to 0.

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Detects when an attacker tries to disable User Account Control (UAC) notification by tampering with the "UACDisableNotify" value. UAC is a critical security feature in Windows that prevents unauthorized changes to the operating system. It prompts the user for permission or an administrator password before allowing actions that could affect the system's operation or change settings that affect other users. When "UACDisableNotify" is set to 1, UAC prompts are suppressed.

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Detects when an attacker tries to change User Account Control (UAC) elevation request destination via the "PromptOnSecureDesktop" value. The "PromptOnSecureDesktop" setting specifically determines whether UAC prompts are displayed on the secure desktop. The secure desktop is a separate desktop environment that's isolated from other processes running on the system. It's designed to prevent malicious software from intercepting or tampering with UAC prompts. When "PromptOnSecureDesktop" is set to 0, UAC prompts are displayed on the user's current desktop instead of the secure desktop. This reduces the level of security because it potentially exposes the prompts to manipulation by malicious software.

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Detects changes to registry keys related to "Trusted Location" of Microsoft Office where the path is set to something uncommon. Attackers might add additional trusted locations to avoid macro security restrictions.

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Detects non-sysinternals tools setting the "accepteula" key which normally is set on sysinternals tool execution

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Detects VBScript content stored into registry keys as seen being used by UNC2452 group

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Detects potential malicious modification of the property value of UseLogonCredential from HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\WDigest to enable clear-text credentials

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Detects the Setting of Windows Defender Exclusions

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Detects when an attacker or tool disables the Windows Defender service (WinDefend) via the registry

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Detects the enabling of the Windows Recall feature via registry manipulation. Windows Recall can be enabled by setting the value of "DisableAIDataAnalysis" to "0". Adversaries may enable Windows Recall as part of post-exploitation discovery and collection activities. This rule assumes that Recall is already explicitly disabled on the host, and subsequently enabled by the adversary.

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Detects changes to the AppInstaller (winget) admin settings. Such as enabling local manifest installations or disabling installer hash checks

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Detects when the 'AllowMultipleTSSessions' value is enabled. Which allows for multiple Remote Desktop connection sessions to be opened at once. This is often used by attacker as a way to connect to an RDP session without disconnecting the other users

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Adversaries may abuse features of Winlogon to execute DLLs and/or executables when a user logs in. Winlogon.exe is a Windows component responsible for actions at logon/logoff as well as the secure attention sequence (SAS) triggered by Ctrl-Alt-Delete.

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Detects modification of autostart extensibility point (ASEP) in registry.

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Detects modification of autostart extensibility point (ASEP) in registry.

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Detects modification of autostart extensibility point (ASEP) in registry.

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Detects modification of autostart extensibility point (ASEP) in registry.

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