Terrance DeJesus
e9f5585a9f
* updated content to reflect changes from Security Docs team * Update rules/linux/execution_flock_binary.toml * Update rules/linux/execution_expect_binary.toml * TOML linting * added escape for crdential_access_spn_attribute_modified.toml
50 lines
1.6 KiB
TOML
50 lines
1.6 KiB
TOML
[metadata]
|
|
creation_date = "2022/03/03"
|
|
maturity = "production"
|
|
updated_date = "2022/04/29"
|
|
|
|
[rule]
|
|
author = ["Elastic"]
|
|
description = """
|
|
Identifies Linux binary find abuse to break out from restricted environments by spawning an interactive system shell.
|
|
The vi/vim editor is the standard text editor in Linux distributions, and the activity of spawning a shell is not a
|
|
standard use of this binary by a user or system administrator. This could potentially indicate a 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 the vi command"
|
|
references = ["https://gtfobins.github.io/gtfobins/vi/"]
|
|
risk_score = 47
|
|
rule_id = "89583d1b-3c2e-4606-8b74-0a9fd2248e88"
|
|
severity = "medium"
|
|
tags = ["Elastic", "Host", "Linux", "Threat Detection", "Execution", "GTFOBins"]
|
|
timestamp_override = "event.ingested"
|
|
type = "eql"
|
|
|
|
query = '''
|
|
process where event.type == "start" and process.parent.name in ("vi", "vim") and process.parent.args == "-c" and process.parent.args in (":!/bin/bash", ":!/bin/sh", ":!bash", ":!sh") and process.name in ("bash", "sh")
|
|
'''
|
|
|
|
|
|
[[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/"
|
|
|