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Description

This search is to detect a COM CLSID execution through powershell. This technique was seen in several adversaries and malware like ransomware conti where it has a feature to execute command using COM Object. This technique may use by network operator at some cases but a good indicator if some application want to gain privilege escalation or bypass uac.

  • Type: TTP
  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
  • Datamodel: Endpoint
  • Last Updated: 2021-08-10
  • Author: Teoderick Contreras, Splunk
  • ID: 65711630-f9bf-11eb-8d72-acde48001122

ATT&CK

ID Technique Tactic
T1546.015 Component Object Model Hijacking Privilege Escalation, Persistence
`powershell` EventCode=4104 Message = "*CreateInstance([type]::GetTypeFromCLSID*" OR Message = "*CreateInstance([Type]::GetTypeFromProgID*"
| stats count min(_time) as firstTime max(_time) as lastTime by EventCode Message ComputerName User 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `powershell_execute_com_object_filter`

Associated Analytic Story

How To Implement

To successfully implement this search, you need to be ingesting logs with the process name, parent process, and command-line executions from your endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the Sysmon TA.

Required field

  • _time

Kill Chain Phase

  • Exploitation

Known False Positives

network operrator may use this command.

RBA

Risk Score Impact Confidence Message
5.0 10 50 A suspicious powershell script contains COM CLSID command in $Message$ with EventCode $EventCode$ in host $ComputerName$

Reference

Test Dataset

Replay any dataset to Splunk Enterprise by using our replay.py tool or the UI. Alternatively you can replay a dataset into a Splunk Attack Range

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