Name:Windows Find Interesting ACL with FindInterestingDomainAcl id:e4a96dfd-667a-4487-b942-ccef5a1e81e8 version:3 date:2024-09-30 author:Gowthamaraj Rajendran, Mauricio Velazco, Splunk status:production type:TTP Description:The following analytic detects the execution of the `Find-InterestingDomainAcl` cmdlet, part of the PowerView toolkit, using PowerShell Script Block Logging (EventCode=4104). This detection leverages logs to identify when this command is run, which is significant as adversaries may use it to find misconfigured or unusual Access Control Lists (ACLs) within a domain. If confirmed malicious, this activity could allow attackers to identify privilege escalation opportunities or weak security configurations in Active Directory, potentially leading to unauthorized access or further exploitation. Data_source:
-Powershell Script Block Logging 4104
search:`powershell` EventCode=4104 ScriptBlockText = "*Find-InterestingDomainAcl*" | stats count min(_time) as firstTime max(_time) as lastTime by EventCode ScriptBlockText Computer UserID | rename Computer as dest, UserID as user | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `windows_find_interesting_acl_with_findinterestingdomainacl_filter`
how_to_implement:The following Hunting analytic requires PowerShell operational logs to be imported. Modify the powershell macro as needed to match the sourcetype or add index. This analytic is specific to 4104, or PowerShell Script Block Logging. known_false_positives:Administrators may leverage PowerSploit tools for legitimate reasons, filter as needed. References: -https://powersploit.readthedocs.io/en/latest/Recon/Find-InterestingDomainAcl/ -https://attack.mitre.org/techniques/T1087/002/ -https://book.hacktricks.xyz/windows-hardening/basic-powershell-for-pentesters/powerview drilldown_searches: name:'View the detection results for - "$dest$" and "$user$"' search:'%original_detection_search% | search dest = "$dest$" user = "$user$"' earliest_offset:'$info_min_time$' latest_offset:'$info_max_time$' name:'View risk events for the last 7 days for - "$dest$" and "$user$"' search:'| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$", "$user$") starthoursago=168 | stats count min(_time) as firstTime max(_time) as lastTime values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories) as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic) as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`' earliest_offset:'$info_min_time$' latest_offset:'$info_max_time$' tags: analytic_story: - 'Active Directory Discovery' asset_type:Endpoint confidence:50 impact:50 message:Suspicious PowerShell Find-InterestingDomainAcl was identified on endpoint $dest$ by user $user$. mitre_attack_id: - 'T1087' - 'T1087.002' observable: name:'dest' type:'Hostname' - role: - 'Victim' name:'user' type:'User' - role: - 'Victim' product: - 'Splunk Enterprise' - 'Splunk Enterprise Security' - 'Splunk Cloud' required_fields: - '_time' - 'EventCode' - 'Message' - 'Computer' - 'UserID' risk_score:25 security_domain:endpoint
