title: LDAP Reconnaissance / Active Directory Enumeration
id: 31d68132-4038-47c7-8f8d-635a39a7c174
status: experimental
description: Detects possible Active Directory enumeration via LDAP
author: Adeem Mawani
date: 2021/06/22
references:
    - https://techcommunity.microsoft.com/t5/microsoft-defender-for-endpoint/hunting-for-reconnaissance-activities-using-ldap-search-filters/ba-p/824726
    - https://github.com/PowerShellMafia/PowerSploit/blob/master/Recon/PowerView.ps1
    - https://github.com/BloodHoundAD/SharpHound3/blob/master/SharpHound3/LdapBuilder.cs
logsource:
    product: windows
    service: ldap_debug
    definition: 'Requires Microsoft-Windows-LDAP-Client/Debug ETW logging'
detection:
    generic_search:
        EventID: 30
        SearchFilter|contains:
            - '(groupType:1.2.840.113556.1.4.803:=2147483648)'
            - '(groupType:1.2.840.113556.1.4.803:=2147483656)'
            - '(groupType:1.2.840.113556.1.4.803:=2147483652)'
            - '(groupType:1.2.840.113556.1.4.803:=2147483650)'
            - '(sAMAccountType=805306369)'
            - '(sAMAccountType=805306368)'
            - '(sAMAccountType=536870913)'
            - '(sAMAccountType=536870912)'
            - '(sAMAccountType=268435457)'
            - '(sAMAccountType=268435456)'
            - '(objectCategory=groupPolicyContainer)'
            - '(objectCategory=organizationalUnit)'
            - '(objectCategory=Computer)'
            - '(objectCategory=nTDSDSA)'
            - '(objectCategory=server)'
            - '(objectCategory=domain)'
            - '(objectCategory=person)'
            - '(objectCategory=group)'
            - '(objectCategory=user)'
            - '(objectClass=trustedDomain)'
            - '(objectClass=computer)'
            - '(objectClass=server)'
            - '(objectClass=group)'
            - '(objectClass=user)'
            - '(primaryGroupID=521)'
            - '(primaryGroupID=516)'
            - '(primaryGroupID=515)'
            - '(primaryGroupID=512)'
            - 'Domain Admins'
    suspicious_flag:
        EventID: 30
        SearchFilter|contains:
            - '(userAccountControl:1.2.840.113556.1.4.803:=4194304)'
            - '(userAccountControl:1.2.840.113556.1.4.803:=2097152)'
            - '!(userAccountControl:1.2.840.113556.1.4.803:=1048574)'
            - '(userAccountControl:1.2.840.113556.1.4.803:=524288)'
            - '(userAccountControl:1.2.840.113556.1.4.803:=65536)'
            - '(userAccountControl:1.2.840.113556.1.4.803:=8192)'
            - '(userAccountControl:1.2.840.113556.1.4.803:=544)'
            - '!(UserAccountControl:1.2.840.113556.1.4.803:=2)'
            - 'msDS-AllowedToActOnBehalfOfOtherIdentity'
            - 'msDS-AllowedToDelegateTo'
            - '(accountExpires=9223372036854775807)'
            - '(accountExpires=0)'
            - '(adminCount=1)'
            - 'ms-MCS-AdmPwd'
    narrow_down_filter:
        EventID: 30
        SearchFilter|contains:
            - '(domainSid=*)'
            - '(objectSid=*)'
    condition: (generic_search and not narrow_down_filter) or (suspicious_flag)
level: medium
tags:
    - attack.discovery
    - attack.t1069.002
    - attack.t1087.002
    - attack.t1482