Name:Windows WinPEAS PowerShell Script Execution id:5cb208df-e1aa-478d-ab2f-8270ff9999b9 version:2 date:None author:Raven Tait, Splunk status:production type:TTP Description:Detects the execution of the WinPEAS PowerShell script via default function names used within the script.
winPEAS is a Windows tool that stands for Windows Privilege Escalation Awesome Script.
Similar to its Linux counterpart, linpeas.sh, winPEAS is designed to automate the process of identifying potential privilege escalation paths on Windows systems. Data_source:
-Powershell Script Block Logging 4104
search:`powershell` EventID="4104" ScriptBlockText IN ( "*returnHotFixID*", "*Start-ACLCheck*", "*UnquotedServicePathCheck*", "*Get-ClipBoardText*" ) | fillnull | stats count min(_time) as firstTime max(_time) as lastTime by Computer EventID ScriptBlockText signature signature_id user_id vendor_product Guid Opcode Name Path ProcessID ScriptBlockId
| rename Computer as dest | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `windows_winpeas_powershell_script_execution_filter`
how_to_implement:The detection is based on data that originates from Endpoint Detection and Response (EDR) agents. These agents are designed to provide security-related telemetry from the endpoints where the agent is installed. To implement this search, you must ingest logs that contain the process GUID, process name, and parent process. Additionally, you must ingest complete command-line executions. These logs must be processed using the appropriate Splunk Technology Add-ons that are specific to the EDR product. The logs must also be mapped to the `Processes` node of the `Endpoint` data model. Use the Splunk Common Information Model (CIM) to normalize the field names and speed up the data modeling process. known_false_positives:Legitimate security assessments or administrative audits may run WinPEAS for privilege escalation checks. Exclude trusted security tools to reduce false alerts. References: -https://raw.githubusercontent.com/carlospolop/PEASS-ng/master/winPEAS/winPEASps1/winPEAS.ps1 drilldown_searches: earliest_offset:'$info_min_time$' latest_offset:'$info_max_time$' name:'View the detection results for - "$user$" and "$dest$"' search:'%original_detection_search% | search user = "$user$" dest = "$dest$"' name:'View risk events for the last 7 days for - "$user$" and "$dest$"' search:'| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$user$", "$dest$") | 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:'7d' latest_offset:'0' analytic_story:['Windows Post-Exploitation']
