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mhaag-spl
66 lines
2.3 KiB
YAML
66 lines
2.3 KiB
YAML
name: Powershell Execute COM Object
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id: 65711630-f9bf-11eb-8d72-acde48001122
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version: 2
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date: '2022-02-25'
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author: Teoderick Contreras, Splunk
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type: TTP
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datamodel:
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- Endpoint
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description: This search is to detect a COM CLSID execution through powershell. This
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technique was seen in several adversaries and malware like ransomware conti where
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it has a feature to execute command using COM Object. This technique may use by
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network operator at some cases but a good indicator if some application want to
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gain privilege escalation or bypass uac.
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search: '`powershell` EventCode=4104 ScriptBlockText = "*CreateInstance([type]::GetTypeFromCLSID*"
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OR ScriptBlockText = "*CreateInstance([Type]::GetTypeFromProgID*"| stats count min(_time)
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as firstTime max(_time) as lastTime by EventCode ScriptBlockText Computer UserID | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)` | `powershell_execute_com_object_filter`'
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how_to_implement: To successfully implement this search, you need to be ingesting
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logs with the process name, parent process, and command-line executions from your
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endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the
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Sysmon TA.
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known_false_positives: network operrator may use this command.
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references:
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- https://threadreaderapp.com/thread/1423361119926816776.html
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- https://www.splunk.com/en_us/blog/security/hunting-for-malicious-powershell-using-script-block-logging.html
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tags:
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analytic_story:
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- Malicious PowerShell
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- Ransomware
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automated_detection_testing: passed
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confidence: 50
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context:
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- Source:Endpoint
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- Stage:Privilege Escalation
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/conti/conti_leak/windows-powershell.log
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impact: 10
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kill_chain_phases:
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- Exploitation
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message: A suspicious powershell script contains COM CLSID command in $ScriptBlockText$
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with EventCode $EventCode$ in host $Computer$
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mitre_attack_id:
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- T1546.015
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- T1546
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- T1059.001
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observable:
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- name: Computer
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type: Hostname
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role:
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- Victim
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- name: User
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type: User
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role:
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- Victim
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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required_fields:
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- _time
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- ScriptBlockText
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- Computer
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- EventCode
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risk_score: 5
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security_domain: endpoint
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