File Download Via Bitsadmin To A Suspicious Target Folder

detection:
  selection_flags:
    CommandLine|contains:
      - ' /transfer '
      - ' /create '
      - ' /addfile '
  selection_folder:
    CommandLine|contains:
      - ':\Perflogs'
      - ':\ProgramData\'
      - ':\Temp\'
      - ':\Users\Public\'
      - ':\Windows\'
      - '\$Recycle.Bin\'
      - '\AppData\Local\'
      - '\AppData\Roaming\'
      - '\Contacts\'
      - '\Desktop\'
      - '\Favorites\'
      - '\Favourites\'
      - '\inetpub\wwwroot\'
      - '\Music\'
      - '\Pictures\'
      - '\Start Menu\Programs\Startup\'
      - '\Users\Default\'
      - '\Videos\'
      - '%ProgramData%'
      - '%public%'
      - '%temp%'
      - '%tmp%'
  selection_img:
    - Image|endswith: '\bitsadmin.exe'
    - OriginalFileName: 'bitsadmin.exe'
  condition: all of 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 Florian Roth (Nextron Systems), 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 bitsadmin.exe trip it: each is on its program’s page, read by CmdID.