Detection rules › Sigma

Hacktool Ruler

Status
test
Severity
high
Log source
product windows, service security
Author
Florian Roth (Nextron Systems)
Source
github.com/SigmaHQ/sigma

This events that are generated when using the hacktool Ruler by Sensepost

Known false positives

  • Go utilities that use staaldraad awesome NTLM library

MITRE ATT&CK coverage

Telemetry coverage

Rule body

title: Hacktool Ruler
id: 24549159-ac1b-479c-8175-d42aea947cae
status: test
description: This events that are generated when using the hacktool Ruler by Sensepost
references:
    - https://github.com/sensepost/ruler
    - https://github.com/sensepost/ruler/issues/47
    - https://github.com/staaldraad/go-ntlm/blob/cd032d41aa8ce5751c07cb7945400c0f5c81e2eb/ntlm/ntlmv1.go#L427
    - https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-10/security/threat-protection/auditing/event-4776
    - https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-10/security/threat-protection/auditing/event-4624
author: Florian Roth (Nextron Systems)
date: 2017-05-31
modified: 2022-10-09
tags:
    - attack.discovery
    - attack.execution
    - attack.collection
    - attack.lateral-movement
    - attack.t1087
    - attack.t1114
    - attack.t1059
    - attack.t1550.002
logsource:
    product: windows
    service: security
detection:
    selection1:
        EventID: 4776
        Workstation: 'RULER'
    selection2:
        EventID:
            - 4624
            - 4625
        WorkstationName: 'RULER'
    condition: (1 of selection*)
falsepositives:
    - Go utilities that use staaldraad awesome NTLM library
level: high

Stages and Predicates

Stage 0: condition

(1 of selection*)

Stage 1: selection1

selection1:
    EventID: 4776
    Workstation: 'RULER'

Stage 2: selection2

selection2:
    EventID:
        - 4624
        - 4625
    WorkstationName: 'RULER'

Indicators

These rows show field, operator, and value matches.