CmdID

CmdID / Rules / Windows

Python Spawning Pretty TTY on Windows

A Sigma rule for process creation on Windows, by Nextron Systems.

high 1 ATT&CK technique 2 programs it names

What it looks for

its detection, as SigmaHQ writes it
detection:
  selection_cli_1:
    CommandLine|contains|all:
      - 'import pty'
      - '.spawn('
  selection_cli_2:
    CommandLine|contains: 'from pty import spawn'
  selection_img:
    Image|endswith:
      - 'python.exe'
      - 'python3.exe'
      - 'python2.exe'
  condition: selection_img and 1 of selection_cli_*

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 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.

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
python.exepython3.exe

ATT&CK

the techniques it is tagged with
T1059Command and Scripting Interpreter

Other rules for T1059 Command and Scripting Interpreter

Suspicious Invocation of Shell via AWK - Linux · Capsh Shell Invocation - Linux · Atlassian Confluence CVE-2022-26134 · CVE-2023-22518 Exploitation Attempt - Suspicious Confluence Child Process (Linux) · Linux Suspicious Child Process from Node.js - React2Shell · Shell Execution via Git - Linux · Shai-Hulud Malware Indicators - Linux · Potential Netcat Reverse Shell Execution · Python Spawning Pretty TTY Via PTY Module · Inline Python Execution - Spawn Shell Via OS System Library · Shell Execution via Rsync - Linux · Suspicious Invocation of Shell via Rsync