CmdID

CmdID / Rules / Windows

UtilityFunctions.ps1 Proxy Dll

A Sigma rule for process creation on Windows, by frack113.

medium 1 ATT&CK technique

What it looks for

its detection, as SigmaHQ writes it
detection:
  selection:
    CommandLine|contains:
      - 'UtilityFunctions.ps1'
      - 'RegSnapin '
  condition: selection

The rule’s detection, its selections and fields in order of name. The whole rule, with its references and false positives, is on SigmaHQ, by frack113, under the Detection Rule License 1.1. CmdID evaluates it on a command line alone: a test on what a command line cannot show, such as the parent process or the user, is not met.

Command lines that trip it

documented abuse, read by CmdID

The commands LOLBAS or GTFOBins documents for utilityfunctions.ps1 trip it: each is on its program’s page, read by CmdID.

ATT&CK

the techniques it is tagged with
T1216System Script Proxy Execution

Other rules for T1216 System Script Proxy Execution

Suspicious CustomShellHost Execution · Potential Manage-bde.wsf Abuse To Proxy Execution · SyncAppvPublishingServer VBS Execute Arbitrary PowerShell Code · Potential Process Execution Proxy Via CL_Invocation.ps1 · Assembly Loading Via CL_LoadAssembly.ps1 · Potential Script Proxy Execution Via CL_Mutexverifiers.ps1 · Uncommon Sigverif.EXE Child Process · AWL Bypass with Winrm.vbs and Malicious WsmPty.xsl/WsmTxt.xsl · Remote Code Execute via Winrm.vbs