We are proud to introduce a new alert in preview mode that addresses Security principal reconnaissance (LDAP). This type of reconnaissance is typically used by attackers to gain critical information about the domain environment.
Lightweight Directory Access Protocol (LDAP) is one the most popular methods used for both legitimate and malicious purposes to query Active Directory and is commonly used as the first phase of a Kerberoasting attack. Kerberoasting attacks are used to get a target list of Security Principal Names (SPNs), which attackers then attempt to get Ticket Granting Server (TGS) tickets for.
Starting from Version 2.67, Azure ATP now detects when suspicious LDAP enumeration queries are made or when queries targeted to sensitive groups that use methods not previously seen are observed. In order to allow Azure ATP to accurately profile and learn legitimate users, alerts of this type are only triggered first the first time 10 days following Azure ATP 2.67 version deployment.