sigma-rules/rules/linux/execution_apt_binary.toml

[metadata]
creation_date = "2022/02/24"
maturity = "production"
updated_date = "2022/03/17"

[rule]
author = ["Elastic"]
description = """
Identifies Linux binary apt/apt-get abuse to breakout out of restricted shells or environments by spawning an
interactive system shell. This activity is not standard use with this binary for a user or system administrator. It
indicates a potentially malicious actor attempting to improve the capabilities or stability of their access.
"""
from = "now-9m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "Linux Restricted Shell Breakout via  apt/apt-get Changelog Escape"
references = ["https://gtfobins.github.io/gtfobins/apt/", "https://gtfobins.github.io/gtfobins/apt-get/"]
risk_score = 47
rule_id = "8fed8450-847e-43bd-874c-3bbf0cd425f3"
severity = "medium"
tags = ["Elastic", "Host", "Linux", "Threat Detection", "Execution", "GTFOBins"]
timestamp_override = "event.ingested"
type = "eql"

query = '''
sequence by host.id, process.pid with maxspan=1m 
  [process where process.name : ("apt", "apt-get") and process.args : "changelog"] 
  [process where process.name : "sensible-pager" and process.args : ("/bin/sh", "/bin/bash") and 
   process.parent.name : ("apt", "apt-get")]
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1059"
name = "Command and Scripting Interpreter"
reference = "https://attack.mitre.org/techniques/T1059/"
[[rule.threat.technique.subtechnique]]
id = "T1059.004"
name = "Unix Shell"
reference = "https://attack.mitre.org/techniques/T1059/004/"



[rule.threat.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"