LOL-Binary Copied From System Directory

detection:
  selection_target_lolbin:
    CommandLine|contains:
      - '\bitsadmin.exe'
      - '\calc.exe'
      - '\certutil.exe'
      - '\cmdl32.exe'
      - '\cscript.exe'
      - '\mshta.exe'
      - '\rundll32.exe'
      - '\wscript.exe'
      - '\ie4uinit.exe'
  selection_target_path:
    CommandLine|contains:
      - '\System32'
      - '\SysWOW64'
      - '\WinSxS'
  selection_tools_cmd:
    CommandLine|contains: 'copy '
    Image|endswith: '\cmd.exe'
  selection_tools_other:
    - Image|endswith:
        - '\robocopy.exe'
        - '\xcopy.exe'
    - OriginalFileName:
        - 'robocopy.exe'
        - 'XCOPY.EXE'
  selection_tools_pwsh:
    CommandLine|contains:
      - 'copy-item'
      - ' copy '
      - 'cpi '
      - ' cp '
    Image|endswith:
      - '\powershell.exe'
      - '\pwsh.exe'
  condition: 1 of selection_tools_* and all of selection_target_*

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 Nasreddine Bencherchali (Nextron Systems), 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 unregmp2.exe trip it: each is on its program’s page, read by CmdID.