AWL Bypass with Winrm.vbs and Malicious WsmPty.xsl/WsmTxt.xsl

detection:
  contains_format_pretty_arg:
    CommandLine|contains:
      - 'format:pretty'
      - 'format:"pretty"'
      - 'format:"text"'
      - 'format:text'
  contains_winrm:
    CommandLine|contains: 'winrm'
  image_from_system_folder:
    Image|startswith:
      - 'C:\Windows\System32\'
      - 'C:\Windows\SysWOW64\'
  condition: contains_winrm and (contains_format_pretty_arg and not image_from_system_folder)

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 Julia Fomina, oscd.community, 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.

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