Malicious Active Directory Replication Request Indicating DCSync
- Product
- windows
- Service
- security
- Author
- HuntRule
- Published
- 2026-07-11
- Updated
- 2026-08-28
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 a directory service access event granting the replicating directory changes right which the ALPHV actor exercised through a credential tool to perform DCSync and pull domain hashes and this matters because outside of domain controllers and a small set of sync services the request for the replication extended right is a high fidelity indicator of DCSync credential theft.
Reporting behind it
- thedfirreport.comhttps://thedfirreport.com/2024/06/10/icedid-brings-screenconnect-and-csharp-streamer-to-alphv-ransomware-deployment/
- attack.mitre.orghttps://attack.mitre.org/techniques/T1003/006/
- nccgroup.comhttps://www.nccgroup.com/research/defending-your-directory-an-expert-guide-to-securing-active-directory-against-dcsync-attacks/
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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