SigmaHQ Detections
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Detects the creation or modification of a Registry Run key specifically for Windows Explorer, where the value points to suspicious locations such as the Recycle Bin, ProgramData, Temp directories, or Public/Default user profiles. This is a common technique used by adversaries to establish persistence on a system, ensuring their malicious code executes upon user login.
Detects potential persistence behavior by monitoring modifications to the Windows TelemetryController registry key. Adversaries can abuse the `CompatTelRunner.exe` binary, which is used by Windows telemetry, to execute arbitrary commands specified in the registry. This rule specifically looks for modifications to the `TelemetryController` subkey where the `Command` value is set to execute common executable file types.
Detects attempts to freeze a process, likely an EDR or an antimalware service process, through EDR-Freeze that abuses the WerFaultSecure.exe process to suspend security software. The rule specifically looks for WerFaultSecure.exe being executed with a particular set of command-line arguments that are indicative of the EDR-Freeze tool's behavior, including '/h', '/pid', '/tid', '/encfile', '/cancel', '/type', and '268310'.
This rule detects attempts to search for JSON Web Tokens (JWTs) via command-line interface (CLI) tools. It specifically looks for common JWT header prefixes ('eyJ0eXAiOi' and 'eyJhbGciOi') within command-line arguments of tools like 'find', 'findstr', 'select-string', and 'strings'. Threat actors often search for these tokens to steal them for purposes such as lateral movement or privilege escalation, as JWTs are widely used for authentication and authorization in various applications and services (e.g., Microsoft 365, Azure, AWS, Google Cloud).
Detects potential DLL sideloading of "DbgModel.dll" when it is loaded from a non-standard or unexpected directory. This rule specifically filters out legitimate loads from common Windows system directories and known application paths like WinDbg and Windows Kits.
This rule detects potential DLL sideloading of "edputil.dll". It specifically looks for instances where "edputil.dll" is loaded from a directory that is not a standard Windows system directory (C:\Windows\System32\, C:\Windows\SysWOW64\, or C:\Windows\WinSxS\). This behavior can indicate an adversary attempting to execute malicious code by tricking a legitimate application into loading a malicious DLL instead of the legitimate one.
Detects potential DLL sideloading of "goopdate.dll", a DLL used by googleupdate.exe. This rule aims to identify instances where this specific DLL is loaded from unexpected or non-standard locations, which could indicate malicious activity such as persistence, defense evasion, or privilege escalation through DLL sideloading.
Detects potential DLL sideloading of "mscorsvc.dll" by identifying instances where this DLL is loaded from a location other than the standard Microsoft .NET Framework or WinSxS directories. This behavior can indicate an attacker attempting to execute malicious code by tricking a legitimate application into loading a rogue DLL.
Detects DLL sideloading of unsigned "mfdetours.dll". Executing "mftrace.exe" can be abused to attach to an arbitrary process and force load any DLL named "mfdetours.dll" from the current directory of execution. This technique can be used for persistence, defense evasion, and privilege escalation.
This rule detects potential DLL sideloading of 'MpSvc.dll'. It specifically looks for instances where 'MpSvc.dll' is loaded from a location other than the legitimate Windows Defender directories or the WinSxS directory. This technique can be used by adversaries to achieve persistence, escalate privileges, or evade defenses by tricking a legitimate application into loading a malicious DLL.
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