Analytics BIOC Low

Unusual Azure AD sync module load

A process that does not usually load the Azure AD Sync mcrypt.dll loaded the module.

Module:
Identity Threat Detection (ITDR)
Licensed by:
Identity Threat Detection (ITDR)
Data source:
XDR Agent
ATT&CK tactics: Credential Access (TA0006)
ATT&CK techniques: OS Credential Dumping (T1003)
Attacker's goals:

Attackers can abuse the Azure AD Connect database files to get access to the AD Sync account. The AD Sync account is a highly privileged account that can perform a DCSync and get access to on-premise password hashes.

Investigative actions:

See whether this was a legitimate action. Follow process/user/host activities. Follow unusual actions of the AD Sync user. Check for unusual Azure AD authentications. Check for a possible DCSync.

Test period:
N/A (single event)
Deduplication:
1 Day
1 variation:
  • Unusual Azure AD sync module load by suspicious process Medium (parent: Low)