Malicious Account Set with Kerberos Pre-authentication Not Required - AS-REP Roasting (via security)
- Product
- windows
- Service
- security
- Author
- HuntRule
- Published
- 2026-09-03
- Updated
- 2026-09-03
ATT&CK techniques
Persistence → Priv EscRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects set an account with Kerberos pre-authentication not required to perform offline brutforce. Account with this status can be checked with the following command > "Get-ADUser -Filter 'useraccountcontrol -band 4194304' -Properties useraccountcontrol".
Reporting behind it
- attack.mitre.orghttps://attack.mitre.org/techniques/T1098/
- social.technet.microsoft.comhttps://social.technet.microsoft.com/wiki/contents/articles/23559.kerberos-pre-authentication-why-it-should-not-be-disabled.aspx
- docs.microsoft.comhttps://docs.microsoft.com/en-us/services-hub/health/remediation-steps-ad/remove-the-highly-insecure-des-encryption-from-user-accounts
- ultimatewindowssecurity.comhttps://www.ultimatewindowssecurity.com/securitylog/encyclopedia/event.aspx?eventID=4738
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
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