mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
patel-bhavin
64 lines
2.3 KiB
YAML
64 lines
2.3 KiB
YAML
name: Powershell Execute COM Object
|
|
id: 65711630-f9bf-11eb-8d72-acde48001122
|
|
version: 2
|
|
date: '2023-04-14'
|
|
author: Teoderick Contreras, Splunk
|
|
status: production
|
|
type: TTP
|
|
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.
|
|
data_source:
|
|
- Powershell 4104
|
|
search: '`powershell` EventCode=4104 ScriptBlockText = "*CreateInstance([type]::GetTypeFromCLSID*"
|
|
| stats count min(_time) as firstTime max(_time) as lastTime by EventCode ScriptBlockText
|
|
Computer user_id | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
|
|
| `powershell_execute_com_object_filter`'
|
|
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.
|
|
known_false_positives: network operrator may use this command.
|
|
references:
|
|
- https://threadreaderapp.com/thread/1423361119926816776.html
|
|
- https://www.splunk.com/en_us/blog/security/hunting-for-malicious-powershell-using-script-block-logging.html
|
|
tags:
|
|
analytic_story:
|
|
- Ransomware
|
|
- Malicious PowerShell
|
|
- Hermetic Wiper
|
|
- Data Destruction
|
|
asset_type: Endpoint
|
|
confidence: 50
|
|
impact: 10
|
|
message: A suspicious powershell script contains COM CLSID command in $ScriptBlockText$
|
|
with EventCode $EventCode$ in host $Computer$
|
|
mitre_attack_id:
|
|
- T1546.015
|
|
- T1546
|
|
- T1059.001
|
|
observable:
|
|
- name: Computer
|
|
type: Hostname
|
|
role:
|
|
- Victim
|
|
product:
|
|
- Splunk Enterprise
|
|
- Splunk Enterprise Security
|
|
- Splunk Cloud
|
|
required_fields:
|
|
- _time
|
|
- ScriptBlockText
|
|
- Computer
|
|
- EventCode
|
|
risk_score: 5
|
|
security_domain: endpoint
|
|
tests:
|
|
- name: True Positive Test
|
|
attack_data:
|
|
- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1546.015/pwh_com_object/windows-powershell-xml.log
|
|
source: XmlWinEventLog:Microsoft-Windows-PowerShell/Operational
|
|
sourcetype: xmlwineventlog
|