[metadata]
creation_date = "2023/02/27"
integration = ["endpoint"]
maturity = "production"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/04/20"

[rule]
author = ["Elastic"]
description = """
Identifies the execution of the unshadow utility which is part of John the Ripper,
a password-cracking tool on the host machine. Malicious actors can use the utility to retrieve
the combined contents of the '/etc/shadow' and '/etc/password' files.
Using the combined file generated from the utility, the malicious threat actors can use them as input
for password-cracking utilities or prepare themselves for future operations by gathering
credential information of the victim.
"""
from = "now-9m"
index = ["logs-endpoint.events.*", "endgame-*"]
language = "eql"
license = "Elastic License v2"
name = "Potential Linux Credential Dumping via Unshadow"
references = [
    "https://www.cyberciti.biz/faq/unix-linux-password-cracking-john-the-ripper/",
]
risk_score = 47
rule_id = "e7cb3cfd-aaa3-4d7b-af18-23b89955062c"
severity = "medium"
tags = ["Elastic", "Elastic Endgame", "Host", "Linux", "Threat Detection", "Credential Access"]
timestamp_override = "event.ingested"
type = "eql"
query = '''
process where host.os.type == "linux" and process.name == "unshadow" and
  event.type == "start" and event.action in ("exec", "exec_event") and process.args_count >= 2
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1003"
name = "OS Credential Dumping"
reference = "https://attack.mitre.org/techniques/T1003/"
[[rule.threat.technique.subtechnique]]
id = "T1003.008"
name = "/etc/passwd and /etc/shadow"
reference = "https://attack.mitre.org/techniques/T1003/008/"



[rule.threat.tactic]
id = "TA0006"
name = "Credential Access"
reference = "https://attack.mitre.org/tactics/TA0006/"