Malicious Exchange Group Membership Change to Perform DCsync Attack (via security)
- Product
- windows
- Service
- security
- Author
- HuntRule
- Published
- 2026-08-10
- 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 adds its account into a sensitive Exchange group to obtain "Replicating Directory Changes /all" and perform DCsync attack.
Reporting behind it
- attack.mitre.orghttps://attack.mitre.org/techniques/T1003/006/
- adsecurity.orghttps://adsecurity.org/?p=4119
- pentestlab.bloghttps://pentestlab.blog/2019/09/12/microsoft-exchange-acl/
- blog.fox-it.comhttps://blog.fox-it.com/2018/04/26/escalating-privileges-with-acls-in-active-directory/
- ultimatewindowssecurity.comhttps://www.ultimatewindowssecurity.com/securitylog/encyclopedia/event.aspx?eventID=4728
- ultimatewindowssecurity.comhttps://www.ultimatewindowssecurity.com/securitylog/encyclopedia/event.aspx?eventID=4732
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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