[metadata]
creation_date = "2023/09/04"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/09/04"
bypass_bbr_timing = true

[rule]
author = ["Elastic"]
description = """
This rule monitors for inter-process communication via Unix sockets. Adversaries may attempt to communicate with local 
Unix sockets to enumerate application details, find vulnerabilities/configuration mistakes and potentially escalate 
privileges or set up malicious communication channels via Unix sockets for inter-process communication to attempt to 
evade detection. 
"""
from = "now-9m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "Unix Socket Connection"
risk_score = 21
rule_id = "41284ba3-ed1a-4598-bfba-a97f75d9aba2"
severity = "low"
tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Execution", "Data Source: Elastic Defend", "Rule Type: BBR"]
timestamp_override = "event.ingested"
building_block_type = "default"
type = "eql"
query = '''
process where host.os.type == "linux" and event.action == "exec" and event.type == "start" and (
  (process.name in ("nc", "ncat", "netcat", "nc.openbsd") and 
   process.args == "-U" and process.args : ("/usr/local/*", "/run/*", "/var/run/*")) or
  (process.name == "socat" and 
   process.args == "-" and process.args : ("UNIX-CLIENT:/usr/local/*", "UNIX-CLIENT:/run/*", "UNIX-CLIENT:/var/run/*"))
)
'''

[[rule.threat]]
framework = "MITRE ATT&CK"

[[rule.threat.technique]]
id = "T1559"
name = "Inter-Process Communication"
reference = "https://attack.mitre.org/techniques/T1559/"

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