KDC RC4-HMAC Downgrade CVE-2022-37966

calendar Oct 17, 2023 · attack.privilege_escalation  ·
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Detects the exploitation of a security bypass and elevation of privilege vulnerability with Authentication Negotiation by using weak RC4-HMAC negotiation

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 1title: KDC RC4-HMAC Downgrade CVE-2022-37966
 2id: e6f81941-b1cd-4766-87db-9fc156f658ee
 3status: test
 4description: Detects the exploitation of a security bypass and elevation of privilege vulnerability with Authentication Negotiation by using weak RC4-HMAC negotiation
 5references:
 6    - https://support.microsoft.com/en-us/topic/kb5021131-how-to-manage-the-kerberos-protocol-changes-related-to-cve-2022-37966-fd837ac3-cdec-4e76-a6ec-86e67501407d
 7author: Florian Roth (Nextron Systems)
 8date: 2022/11/09
 9tags:
10    - attack.privilege_escalation
11logsource:
12    product: windows
13    service: system
14detection:
15    selection:
16        EventID: 42
17        Provider_Name: 'Kerberos-Key-Distribution-Center'
18        Level: 2  # Error
19    condition: selection
20falsepositives:
21    - Unknown
22level: high

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