Malicious User Password Change Using Current Hash Password - ChangeNTLM - Mimikatz (via security)
- Product
- windows
- Service
- security
- Author
- HuntRule
- Published
- 2026-09-05
- Updated
- 2026-09-05
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 resets a user account by using the compromised NTLM password hash. The newly clear text password defined by the attacker can be then used in order to login into services like Outlook Web Access (OWA), RDP, SharePoint... As ID 4723 refers to user changing is own password, the SubjectSid and TargetSid should be equal. However in a change initiated by Mimikatz, they will be different. Correlate the event ID 4723, 4624 and 5145 using the "SubjectLogonId" field to identify the source of the reset.
Reporting behind it
- attack.mitre.orghttps://attack.mitre.org/techniques/T1098/
- stealthbits.comhttps://stealthbits.com/blog/manipulating-user-passwords-with-mimikatz/
- trustedsec.comhttps://www.trustedsec.com/blog/azure-account-hijacking-using-mimikatzs-lsadumpsetntlm/
- trustedsec.comhttps://www.trustedsec.com/blog/manipulating-user-passwords-without-mimikatz/
- ultimatewindowssecurity.comhttps://www.ultimatewindowssecurity.com/securitylog/encyclopedia/event.aspx?eventID=4723
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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