Interactive Terminal Spawned via Python

Identifies when a terminal (tty) is spawned via Python. Attackers may upgrade a simple reverse shell to a fully interactive tty after obtaining initial access to a host.

Rule type: query

Rule indices:

auditbeat-*
logs-endpoint.events.*

Severity: high

Risk score: 73

Runs every: 5 minutes

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

Tags:

Elastic
Host
Linux
Threat Detection
Execution

Version: 6 (version history)

Added (Elastic Stack release): 7.8.0

Last modified (Elastic Stack release): 7.12.0

Rule authors: Elastic

Rule license: Elastic License v2

Rule query

edit

event.category:process and event.type:(start or process_started) and
process.name:python and process.args:("import pty;
pty.spawn(\"/bin/sh\")" or "import pty;
pty.spawn(\"/bin/dash\")" or "import pty;
pty.spawn(\"/bin/bash\")")

Threat mapping

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Framework: MITRE ATT&CK^TM

Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
Technique:
- Name: Command and Scripting Interpreter
- ID: T1059
- Reference URL: https://attack.mitre.org/techniques/T1059/

Rule version history

edit

Version 6 (7.12.0 release)

Formatting only

Version 5 (7.11.2 release)

Formatting only

Version 4 (7.10.0 release)

Formatting only

Version 3 (7.9.1 release)

Formatting only

Version 2 (7.9.0 release)

Updated query, changed from:

event.action:executed and process.name:python and
process.args:("import pty; pty.spawn(\"/bin/sh\")" or "import pty;
pty.spawn(\"/bin/dash\")" or "import pty; pty.spawn(\"/bin/bash\")")

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