Malicious Rubeus Kerberos Constrained Delegation Abuse - S4U2Proxy (via security)
- Product
- windows
- Service
- security
- Author
- HuntRule
- Published
- 2026-08-31
- Updated
- 2026-08-31
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 Kerberos constrained delegation in order to escalate privileges.
Reporting behind it
- attack.mitre.orghttps://attack.mitre.org/techniques/T1558/
- dirkjanm.iohttps://dirkjanm.io/krbrelayx-unconstrained-delegation-abuse-toolkit/
- harmj0y.nethttps://www.harmj0y.net/blog/activedirectory/s4u2pwnage/
- shenaniganslabs.iohttps://shenaniganslabs.io/2019/01/28/Wagging-the-Dog.html
- ired.teamhttps://www.ired.team/offensive-security-experiments/active-directory-kerberos-abuse/abusing-kerberos-constrained-delegation
- guidepointsecurity.comhttps://www.guidepointsecurity.com/delegating-like-a-boss-abusing-kerberos-delegation-in-active-directory/
- stealthbits.comhttps://stealthbits.com/blog/what-is-kerberos-delegation-an-overview-of-kerberos-delegation/
- thehacker.recipeshttps://www.thehacker.recipes/ad/movement/kerberos/delegations#talk
- ultimatewindowssecurity.comhttps://www.ultimatewindowssecurity.com/securitylog/encyclopedia/event.aspx?eventID=4769
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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