Metasploit SMB Authentication — Sigma Rule

Rule metadata and linked tags

Author: Chakib Gzenayi (@Chak092), Hosni Mribah. Source status: test; severity: high. Source dates: 2020-05-06 / 2024-01-25.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 889093e418a7aeb677462b7ba99950124470f18b40b37b789cd65bc35718c3b6

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: Metasploit SMB Authentication
id: 72124974-a68b-4366-b990-d30e0b2a190d
status: test
description: Alerts on Metasploit host's authentications on the domain.
references:
    - https://github.com/rapid7/metasploit-framework/blob/1416b5776d963f21b7b5b45d19f3e961201e0aed/lib/rex/proto/smb/client.rb
author: Chakib Gzenayi (@Chak092), Hosni Mribah
date: 2020-05-06
modified: 2024-01-25
tags:
    - attack.lateral-movement
    - attack.t1021.002
logsource:
    product: windows
    service: security
detection:
    selection1:
        EventID:
            - 4625
            - 4624
        LogonType: 3
        AuthenticationPackageName: 'NTLM'
        WorkstationName|re: '^[A-Za-z0-9]{16}$'
    selection2:
        EventID: 4776
        Workstation|re: '^[A-Za-z0-9]{16}$'
    condition: 1 of selection*
falsepositives:
    - Linux hostnames composed of 16 characters.
level: high

Original YAML and metadata in JSON

False positives

• Linux hostnames composed of 16 characters.

Source references

• https://github.com/rapid7/metasploit-framework/blob/1416b5776d963f21b7b5b45d19f3e961201e0aed/lib/rex/proto/smb/client.rb