Change User Account Associated with the FAX Service

calendar Nov 2, 2023 · attack.defense_evasion attack.t1112  ·
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Detect change of the user account associated with the FAX service to avoid the escalation problem.

Sigma rule (View on GitHub)

 1title: Change User Account Associated with the FAX Service
 2id: e3fdf743-f05b-4051-990a-b66919be1743
 3status: test
 4description: Detect change of the user account associated with the FAX service to avoid the escalation problem.
 5references:
 6    - https://twitter.com/dottor_morte/status/1544652325570191361
 7    - https://raw.githubusercontent.com/RiccardoAncarani/talks/master/F-Secure/unorthodox-lateral-movement.pdf
 8author: frack113
 9date: 2022/07/17
10modified: 2022/12/30
11tags:
12    - attack.defense_evasion
13    - attack.t1112
14logsource:
15    product: windows
16    category: registry_set
17detection:
18    selection:
19        TargetObject: HKLM\System\CurrentControlSet\Services\Fax\ObjectName
20    filter:
21        Details|contains: NetworkService
22    condition: selection and not filter
23falsepositives:
24    - Unknown
25level: high

References

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