Monitoring For Persistence Via BITS

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

medium 1 ATT&CK technique 1 program it names 2 everyday examples trip it

What it looks for

its detection, as SigmaHQ writes it

detection:
  selection_cli_add_1:
    CommandLine|contains: '/Addfile'
  selection_cli_add_2:
    CommandLine|contains:
      - 'http:'
      - 'https:'
      - 'ftp:'
      - 'ftps:'
  selection_cli_notify_1:
    CommandLine|contains: '/SetNotifyCmdLine'
  selection_cli_notify_2:
    CommandLine|contains:
      - '%COMSPEC%'
      - 'cmd.exe'
      - 'regsvr32.exe'
  selection_img:
    - Image|endswith: '\bitsadmin.exe'
    - OriginalFileName: 'bitsadmin.exe'
  condition: selection_img and (all of selection_cli_notify_* or all of selection_cli_add_*)

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 Sreeman, 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

everyday examples from tldr-pages, CC BY 4.0, each read by CmdID

To add a file to the job on the page for bitsadmin addfile

bitsadmin /addfile myDownloadJob http://downloadsrv/10mb.zip c:\10mb.zipIdentify

To transfer 100 bytes from offset 0, 100 bytes from offset 2000, and the remaining bytes from offset 5000 to the end of the file on the page for bitsadmin addfilewithranges

bitsadmin /addfilewithranges http://downloadsrv/10mb.zip c:\10mb.zip 0:100,2000:100,5000:eofIdentify

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

Programs and files it names

their pages here

bitsadmin.exe

ATT&CK

the techniques it is tagged with

T1197BITS Jobs