Suspicious Access to LDAP Attributes

Author: Elastic
Source: upstream

Identify read access to a high number of Active Directory object attributes. The knowledge of objects properties can help adversaries find vulnerabilities, elevate privileges or collect sensitive information.

MITRE ATT&CK coverage

Tactic	Techniques
Discovery	`T1069` Permission Groups Discovery, `T1069.002` Permission Groups Discovery: Domain Groups, `T1087` Account Discovery, `T1087.002` Account Discovery: Domain Account, `T1482` Domain Trust Discovery

Event coverage

Provider	Event ID	Title
Security-Auditing	4662	An operation was performed on an object.

Stages and Predicates

Stage 1: `eql:any`

not winlog.event_data.SubjectUserSid:"S-1-5-18" and winlog.event_data.AccessMaskDescription:"Read Property"

Exclusions

Top-level NOT(...) conjuncts — predicates this rule actively suppresses.

Stage	Field	Kind	Excluded values
1	`SubjectUserSid`	eq	`S-1-5-18`

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

Field	Kind	Values
`winlog.event_data.AccessMaskDescription`	eq	`Read Property`