credential_access_relay_ntlm_auth_via_http_spoolss.toml

[metadata]
creation_date = "2022/04/30"
integration = ["endpoint", "windows"]
maturity = "production"
updated_date = "2024/08/07"

[rule]
author = ["Elastic"]
description = """
Identifies attempt to coerce a local NTLM authentication via HTTP using the Windows Printer Spooler service as a target.
An adversary may use this primitive in combination with other techniques to elevate privileges on a compromised system.
"""
from = "now-9m"
index = [
    "winlogbeat-*",
    "logs-endpoint.events.process-*",
    "logs-windows.*",
    "endgame-*",
    "logs-system.security*",
]
language = "eql"
license = "Elastic License v2"
name = "Potential Local NTLM Relay via HTTP"
references = [
    "https://github.com/med0x2e/NTLMRelay2Self",
    "https://github.com/topotam/PetitPotam",
    "https://github.com/dirkjanm/krbrelayx/blob/master/printerbug.py",
]
risk_score = 73
rule_id = "4682fd2c-cfae-47ed-a543-9bed37657aa6"
severity = "high"
tags = [
    "Domain: Endpoint",
    "OS: Windows",
    "Use Case: Threat Detection",
    "Tactic: Credential Access",
    "Tactic: Defense Evasion",
    "Data Source: Elastic Endgame",
    "Data Source: Elastic Defend",
    "Data Source: System",
]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where host.os.type == "windows" and event.type == "start" and
  process.name : "rundll32.exe" and

  /* Rundll32 WbeDav Client  */
  process.args : ("?:\\Windows\\System32\\davclnt.dll,DavSetCookie", "?:\\Windows\\SysWOW64\\davclnt.dll,DavSetCookie") and

  /* Access to named pipe via http */
  process.args : ("http*/print/pipe/*", "http*/pipe/spoolss", "http*/pipe/srvsvc")
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1212"
name = "Exploitation for Credential Access"
reference = "https://attack.mitre.org/techniques/T1212/"


[rule.threat.tactic]
id = "TA0006"
name = "Credential Access"
reference = "https://attack.mitre.org/tactics/TA0006/"
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1218"
name = "System Binary Proxy Execution"
reference = "https://attack.mitre.org/techniques/T1218/"
[[rule.threat.technique.subtechnique]]
id = "T1218.011"
name = "Rundll32"
reference = "https://attack.mitre.org/techniques/T1218/011/"



[rule.threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"