LDAP AD CS Enumeration via Attack Tool

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	XDR Agent with eXtended Threat Hunting (XTH)
Detection Modules	Identity Analytics
Detector Tags	LDAP Analytics (Client), LDAP Analytics (Server), Active Directory Certificate Services Analytics
ATT&CK Tactic	Discovery (TA0007), Credential Access (TA0006)
ATT&CK Technique	Account Discovery (T1087), Steal or Forge Authentication Certificates (T1649)
Severity	Low

Description

A user sent a suspicious AD CS enumeration query via LDAP. The query is associated with an AD CS LDAP enumeration tool that may be used during attacks against the organization.

Attacker's Goals

An attacker is attempting to enumerate Active Directory.

Investigative actions

• Check if the process executes LDAP search queries as part of its normal behavior.
• Investigate the LDAP search query for any suspicious indicators.
• Determine whether the search query is generic. Wide search queries (often using wildcards) tend to be more suspicious. In our case, we are looking for targeted search queries.

Variations

Abnormal LDAP AD CS Enumeration via Attack Tool

Synopsis

Field	Value
ATT&CK Tactic	Discovery (TA0007), Credential Access (TA0006)
ATT&CK Technique	Account Discovery (T1087), Steal or Forge Authentication Certificates (T1649)
Severity	Medium

Description

A user sent a suspicious AD CS enumeration query via LDAP. The query is associated with an AD CS LDAP enumeration tool that may be used during attacks against the organization.

Attacker's Goals

An attacker is attempting to enumerate Active Directory.

Investigative actions

• Check if the process executes LDAP search queries as part of its normal behavior.
• Investigate the LDAP search query for any suspicious indicators.
• Determine whether the search query is generic. Wide search queries (often using wildcards) tend to be more suspicious. In our case, we are looking for targeted search queries.