SigmaHQ Detections
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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
Detects setting of a new registry value related to BgInfo configuration, which can be abused to execute custom VBScript via "BgInfo.exe"
Detects setting of a new registry value related to BgInfo configuration, which can be abused to execute custom WMI query via "BgInfo.exe"
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.
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.
COM Hijack via Sdclt
Sigma
Detects changes to 'HKCU\Software\Classes\Folder\shell\open\command\DelegateExecute'
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.
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.
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)
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)
Detects applications being added to the "allowed applications" list of exploit guard in order to bypass controlled folder settings
Detect change of the user account associated with the FAX service to avoid the escalation problem.
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