CmdID / Rules / Linux

Shell Invocation via Env Command - Linux

A Sigma rule for process creation on Linux, by Li Ling, Andy Parkidomo, Robert Rakowski, Blake Hartstein (Bloomberg L.P.).

high 1 ATT&CK technique 1 program it names

What it looks for

its detection, as SigmaHQ writes it

detection:
  selection:
    CommandLine|contains:
      - '/bin/bash'
      - '/bin/dash'
      - '/bin/fish'
      - '/bin/sh'
      - '/bin/zsh'
    Image|endswith: '/env'
  condition: 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 Li Ling, Andy Parkidomo, Robert Rakowski, Blake Hartstein (Bloomberg L.P.), 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

documented abuse, read by CmdID

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

Programs and files it names

their pages here

env

ATT&CK

the techniques it is tagged with

T1059.004Command and Scripting Interpreter: Unix Shell

Shell Invocation via Env Command - Linux

What it looks for

Command lines that trip it

Programs and files it names

ATT&CK

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