Shell Spawned by Celery Worker Process

A Sigma rule for process creation on Linux, by Jennifer Batina.

medium 1 ATT&CK technique 10 programs it names

What it looks for

its detection, as SigmaHQ writes it

detection:
  selection_img:
    Image|endswith:
      - '/ash'
      - '/bash'
      - '/busybox'
      - '/csh'
      - '/dash'
      - '/fish'
      - '/ksh'
      - '/sh'
      - '/tcsh'
      - '/zsh'
    ParentCommandLine|contains: 'celery'
  selection_parent:
    - ParentImage|endswith:
        - '/python'
        - '/python3'
    - ParentImage|contains: '/python3.'
  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 Jennifer Batina, 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.

None of the everyday examples and documented commands on CmdID’s program pages trips it. To see whether a command line does, paste it into CmdID.

Programs and files it names

their pages here

ashbashbusyboxcshdashfishkshtcshzshsh

ATT&CK

the techniques it is tagged with

T1059.004Command and Scripting Interpreter: Unix Shell

Shell Spawned by Celery Worker Process

What it looks for

Programs and files it names

ATT&CK

Other rules for T1059.004 Command and Scripting Interpreter: Unix Shell