IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

« LaunchDaemon Creation or Modification and Immediate Loading Linux Restricted Shell Breakout via awk Commands »

› › ›

Linux Restricted Shell Breakout via apt/apt-get Changelog Escape

edit

Linux Restricted Shell Breakout via apt/apt-get Changelog Escape

edit

Identifies Linux binary apt/apt-get abuse to breakout out of restricted shells or environments by spawning an interactive system shell. The apt utility allows us to manage installation and removal of softwares on Debian based Linux distributions and the activity of spawning shell is not a standard use of this binary for a user or system administrator. It indicates a potentially malicious actor attempting to improve the capabilities or stability of their access.

Rule type: eql

Rule indices:

logs-endpoint.events.*

Severity: medium

Risk score: 47

Runs every: 5 minutes

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

Maximum alerts per execution: 100

References:

Tags:

Elastic
Host
Linux
Threat Detection
Execution
GTFOBins

Version: 1

Added (Elastic Stack release): 8.2.0

Rule authors: Elastic

Rule license: Elastic License v2

Rule query

edit

process where event.type == "start" and process.name == "sensible-
pager" and process.args in ("/bin/sh", "/bin/bash", "/bin/dash",
"sh", "bash", "dash") and process.parent.name in ("apt", "apt-get")
and process.parent.args == "changelog"

Threat mapping

edit

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/

« LaunchDaemon Creation or Modification and Immediate Loading Linux Restricted Shell Breakout via awk Commands »