SigmaHQ/rules/windows/sysmon/sysmon_suspicious_outbound_kerberos_connection.yml

title: Suspicious Outbound Kerberos Connection
id: e54979bd-c5f9-4d6c-967b-a04b19ac4c74
status: experimental
description: Detects suspicious outbound network activity via kerberos default port indicating possible lateral movement or first stage PrivEsc via delegation.
references:
    - https://github.com/GhostPack/Rubeus8
author: Ilyas Ochkov, oscd.community
date: 2019/10/24
modified: 2019/11/13
tags:
    - attack.lateral_movement
    - attack.t1208
logsource:
    product: windows
    service: sysmon
detection:
    selection:
        EventID: 3
        DestinationPort: 88
        Initiated: 'true'
    filter:
        Image|endswith:
            - '\lsass.exe'
            - '\opera.exe'
            - '\chrome.exe'
            - '\firefox.exe'
    condition: selection and not filter 
falsepositives:
    - Other browsers
level: high