sigma-rules/rules/linux/execution_remote_code_execution_via_postgresql.toml

[metadata]
creation_date = "2022/06/20"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/07/31"

[rule]
author = ["Elastic"]
description = """
This rule monitors for suspicious activities that may indicate an attacker attempting to execute arbitrary code within 
a PostgreSQL environment. Attackers can execute code via PostgreSQL as a result of gaining unauthorized access to a
public facing PostgreSQL database or exploiting vulnerabilities, such as remote command execution and SQL injection
attacks, which can result in unauthorized access and malicious actions, and facilitate post-exploitation activities
for unauthorized access and malicious actions.
"""
from = "now-9m"
index = ["logs-endpoint.events.*", "endgame-*"]
language = "eql"
license = "Elastic License v2"
name = "Potential Code Execution via Postgresql"
risk_score = 47
rule_id = "2a692072-d78d-42f3-a48a-775677d79c4e"
severity = "medium"
tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Execution", "Data Source: Elastic Endgame"]
type = "eql"

query = '''
process where host.os.type == "linux" and event.action in ("exec", "exec_event", "fork", "fork_event") and 
event.type == "start" and user.name == "postgres" and (
  (process.parent.args : "*sh" and process.parent.args : "echo*") or 
  (process.args : "*sh" and process.args : "echo*")
) and not process.parent.name : "puppet"
'''

[[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/"