Emerging Threathightest
Potential KDC RC4-HMAC Downgrade Exploit - CVE-2022-37966
Detects the exploitation of a security bypass and elevation of privilege vulnerability with Authentication Negotiation by using weak RC4-HMAC negotiation
Convert In Phoenix Studio
Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.
Launch
Florian Roth (Nextron Systems)Created Wed Nov 09Updated Mon Nov 03e6f81941-b1cd-4766-87db-9fc156f658ee2022
Emerging Threat
Active Threat
Developed to detect an active or emerging threat. Prioritize investigation of any alerts and correlate with threat intelligence.
Log Source
Windowssystem
ProductWindows← raw: windows
Servicesystem← raw: system
Detection Logic
Detection Logic1 selector
detection:
selection:
EventID: 42
Provider_Name:
- 'Kerberos-Key-Distribution-Center'
- 'Microsoft-Windows-Kerberos-Key-Distribution-Center'
Level: 2 # Error
condition: selectionFalse Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Other
detection.emerging-threatscve.2022-37966
Rule Metadata
Rule ID
e6f81941-b1cd-4766-87db-9fc156f658ee
Status
test
Level
high
Type
Emerging Threat
Created
Wed Nov 09
Modified
Mon Nov 03
Path
rules-emerging-threats/2022/Exploits/CVE-2022-37966/win_system_exploit_cve_2022_37966_kdcsvc_rc4_downgrade.yml
Raw Tags
attack.privilege-escalationdetection.emerging-threatscve.2022-37966