credential_access_relay_ntlm_auth_via_http_spoolss.toml

[metadata]
creation_date = "2022/04/30"
maturity = "production"
updated_date = "2022/04/30"

[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.*", "logs-windows.*"]
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 = ["Elastic", "Host", "Windows", "Threat Detection", "Credential Access"]
type = "eql"

query = '''
process where event.type in ("start", "process_started") 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/"