Suspicious modification of the AdminSDHolder's ACL

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	Requires one of the following data sources: Windows Event Collector OR XDR Agent with eXtended Threat Hunting (XTH)
Detection Modules	Identity Analytics
ATT&CK Tactic	Persistence (TA0003)
ATT&CK Technique	Account Manipulation (T1098)
Severity	Low

Description

A user modified the AdminSDHolder ACL, which may be an indication of a privilege escalation attack.

Attacker's Goals

Attackers attempt to obtain full control privileges and then move laterally.

Investigative actions

• Check if a new user was added to the AdminSDHolder object.
• Check if a suspicious user account was recently created.
• Check if a user was added to a privileged group (e.g. Domain Admins).
• Investigate any other potentially suspicious behavior from the compromised user.
• Search for actions that may trigger SDProp, such as modifying the registry or executing an LDAP query.