KrbRelayUp Service Installation — Sigma Rule

Rule metadata and linked tags

Author: Sittikorn S, Tim Shelton. Source status: test; severity: high. Source dates: 2022-05-11 / 2022-10-05.

{
  "product": "windows",
  "service": "system"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 1b6a80ea33311fb86631d9b742ec7e453117cfbca3560bdd8109fb323546a719

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: KrbRelayUp Service Installation
id: e97d9903-53b2-41fc-8cb9-889ed4093e80
status: test
description: Detects service creation from KrbRelayUp tool used for privilege escalation in Windows domain environments where LDAP signing is not enforced (the default settings)
references:
    - https://github.com/Dec0ne/KrbRelayUp
author: Sittikorn S, Tim Shelton
date: 2022-05-11
modified: 2022-10-05
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.t1543
logsource:
    product: windows
    service: system
detection:
    selection:
        EventID: 7045
        ServiceName: 'KrbSCM'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://github.com/Dec0ne/KrbRelayUp