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Interactive Terminal Spawned via Python

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Interactive Terminal Spawned via Python

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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: eql

Rule indices:

logs-endpoint.events.*
endgame-*

Severity: high

Risk score: 73

Runs every: 5m

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

Maximum alerts per execution: 100

References: None

Tags:

Domain: Endpoint
OS: Linux
Use Case: Threat Detection
Tactic: Execution
Data Source: Elastic Endgame
Data Source: Elastic Defend

Version: 109

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

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process where host.os.type == "linux" and event.action in ("exec", "exec_event") and
(
  (process.parent.name : "python*" and process.name in ("bash", "dash", "ash", "sh", "tcsh", "csh", "zsh", "ksh",
   "fish") and process.parent.args_count >= 3 and process.parent.args : "*pty.spawn*" and process.parent.args : "-c") or
  (process.parent.name : "python*" and process.name in ("bash", "dash", "ash", "sh", "tcsh", "csh", "zsh", "ksh",
   "fish") and process.args : "*sh" and process.args_count == 1 and process.parent.args_count == 1)
)

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/
Sub-technique:
- Name: Python
- ID: T1059.006
- Reference URL: https://attack.mitre.org/techniques/T1059/006/

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