Malicious Kerberos AS-REP Roasting Ticket Request (via security)
- Product
- windows
- Service
- security
- Author
- HuntRule
- Published
- 2026-11-08
- Updated
- 2026-11-08
ATT&CK techniques
Cred AccessRecon
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 abuse an account with UAC settings set to "Accounts Does not Require Pre-Authentication" in order to perform offline TGT brutforce. May also be triggered by an attacker performing some Kerberos user enumration with tools like "Kerbrute".
Reporting behind it
- attack.mitre.orghttps://attack.mitre.org/techniques/T1558/004/
- github.comhttps://github.com/HarmJ0y/ASREPRoast
- ired.teamhttps://www.ired.team/offensive-security-experiments/active-directory-kerberos-abuse/as-rep-roasting-using-rubeus-and-hashcat
- m0chan.github.iohttps://m0chan.github.io/2019/07/31/How-To-Attack-Kerberos-101.html#as-rep-roasting
- medium.comhttps://medium.com/@jsecurity101/ioc-differences-between-kerberoasting-and-as-rep-roasting-4ae179cdf9ec
- rioasmara.comhttps://rioasmara.com/2020/07/04/kerberoasting-as-req-pre-auth-vs-non-pre-auth/
- hackingarticles.inhttps://www.hackingarticles.in/as-rep-roasting/
- ultimatewindowssecurity.comhttps://www.ultimatewindowssecurity.com/securitylog/encyclopedia/event.aspx?eventID=4768
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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