Scheduled Task/Job At

A Sigma rule for process creation on Linux, by Ömer Günal, oscd.community.

low 1 ATT&CK technique 1 program it names 3 everyday examples trip it

What it looks for

its detection, as SigmaHQ writes it

detection:
  selection:
    Image|endswith:
      - '/at'
      - '/atd'
  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 Ömer Günal, oscd.community, 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

Create commands interactively and execute them in 5 minutes (press <Ctrl d> when done) on the page for at

at now + 5 minutesIdentify

Create commands interactively and execute them at a specific time on the page for at

at hh:mmIdentify

Execute a command from stdin at 10:00 AM today on the page for at

echo "command" | at 1000Identify

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

Programs and files it names

their pages here

at

ATT&CK

the techniques it is tagged with

T1053.002Scheduled Task/Job: At

Scheduled Task/Job At

What it looks for

Command lines that trip it

Programs and files it names

ATT&CK

Other rules for T1053.002 Scheduled Task/Job: At