[metadata]
creation_date = "2023/07/31"
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 detects potential sudo token manipulation attacks through process injection by monitoring the use of a 
debugger (gdb) process followed by a successful uid change event during the execution of the sudo process. A sudo token 
manipulation attack is performed by injecting into a process that has a valid sudo token, which can then be used by
attackers to activate their own sudo token. This attack requires ptrace to be enabled in conjunction with the existence 
of a living process that has a valid sudo token with the same uid as the current user. 
"""
from = "now-9m"
index = ["logs-endpoint.events.*"]
language = "eql"
license = "Elastic License v2"
name = "Potential Sudo Token Manipulation via Process Injection"
references = ["https://github.com/nongiach/sudo_inject"]
risk_score = 47
rule_id = "ff9bc8b9-f03b-4283-be58-ee0a16f5a11b"
severity = "medium"
tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Privilege Escalation", "Data Source: Elastic Defend"]
type = "eql"
query = '''
sequence by host.id, process.session_leader.entity_id with maxspan=15s
[ process where host.os.type == "linux" and event.action == "exec" and event.type == "start" and 
  process.name == "gdb" and process.user.id != "0" and process.group.id != "0" ]
[ process where host.os.type == "linux" and event.action == "uid_change" and event.type == "change" and 
  process.name == "sudo" and process.user.id == "0" and process.group.id == "0" ]
'''

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

[[rule.threat.technique]]
id = "T1055"
name = "Process Injection"
reference = "https://attack.mitre.org/techniques/T1055/"

[[rule.threat.technique.subtechnique]]
id = "T1055.008"
name = "Ptrace System Calls"
reference = "https://attack.mitre.org/techniques/T1055/008/"

[[rule.threat.technique]]
id = "T1548"
name = "Abuse Elevation Control Mechanism"
reference = "https://attack.mitre.org/techniques/T1548/"

[[rule.threat.technique.subtechnique]]
id = "T1548.003"
name = "Sudo and Sudo Caching"
reference = "https://attack.mitre.org/techniques/T1548/003/"

[rule.threat.tactic]
id = "TA0004"
name = "Privilege Escalation"
reference = "https://attack.mitre.org/tactics/TA0004/"