SigmaHQ Detections
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Detects the creation of scheduled tasks using `schtasks.exe` where the command line arguments include names of common Windows system processes. This behavior can indicate an adversary attempting to masquerade a malicious scheduled task as a legitimate system process for persistence or privilege escalation.
This rule detects the use of 'fodhelper.exe' as a parent process. Fodhelper.exe is a legitimate Windows utility that can be abused to bypass User Account Control (UAC) and execute processes with elevated privileges without prompting the user. Adversaries commonly leverage this technique for privilege escalation and defense evasion.
Detects modifications to specific autostart extensibility points (ASEPs) within the Wow6432Node Classes registry path. These registry keys are often abused by adversaries to establish persistence or elevate privileges by ensuring their malicious code executes upon system startup or user logon.
Detects the addition of the 'MiniNt' key to the registry. Upon a reboot, Windows Event Log service will stop writing events. Windows Event Log is a service that collects and stores event logs from the operating system and applications. It is an important component of Windows security and auditing. Adversary may want to disable this service to disable logging of security events which could be used to detect their activities.
This rule detects modifications to the 'ObjectName' registry value for the Windows FAX service. Specifically, it triggers when the 'ObjectName' value is changed from anything other than 'NetworkService'. This change could indicate an adversary attempting to escalate privileges or establish persistence by associating the FAX service with a different user account, potentially one with higher privileges or a compromised account, to execute malicious code or maintain access.
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
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
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.
.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.
Detects modifications to registry keys related to Microsoft Office "Trusted Locations" where an uncommon path is added. Attackers may leverage this to bypass macro security restrictions by adding their malicious document locations as trusted.
Detects changes to the PSFactory COM InProcServer32 registry key, specifically targeting the CLSID {c90250f3-4d7d-4991-9b69-a5c5bc1c2ae6}. This technique has been observed being used by the RomCom threat actor to establish persistence by storing a malicious DLL, replacing the legitimate ActXPrxy.dll.
This rule detects potential persistence activity by monitoring modifications to the Outlook Today page settings in the Windows Registry. Attackers can leverage this feature by setting a custom URL in the registry keys `Software\Microsoft\Office\<version>\Outlook\Today\URL` or `Software\Microsoft\Office\<version>\Outlook\Today\UserDefinedUrl`, along with setting the `Stamp` value to `0x00000001`. This allows for the execution of arbitrary code when Outlook is opened, providing a persistent foothold on the system.
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