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tccontre
66 lines
2.1 KiB
YAML
66 lines
2.1 KiB
YAML
name: Wbemprox COM Object Execution
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id: 9d911ce0-c3be-11eb-b177-acde48001122
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version: 1
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date: '2021-06-02'
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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 designed to detect potential malicious process loading
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COM object to wbemprox.dll,
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search: '`sysmon` EventCode=7 ImageLoaded IN ("*\\fastprox.dll", "*\\wbemprox.dll",
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"*\\wbemcomn.dll") NOT (process_name IN ("wmiprvse.exe", "WmiApSrv.exe", "unsecapp.exe"))
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NOT(Image IN("*\\windows\\*","*\\program files*", "*\\wbem\\*")) | stats count min(_time)
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as firstTime max(_time) as lastTime by Image ImageLoaded process_name Computer EventCode
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Signed ProcessId Hashes IMPHASH | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
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| `wbemprox_com_object_execution_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 and imageloaded executions from your endpoints. If you
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are using Sysmon, you must have at least version 6.0.4 of the Sysmon TA.
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known_false_positives: legitimate process that are not in the exception list may trigger
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this event.
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references:
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- https://krebsonsecurity.com/2021/05/a-closer-look-at-the-darkside-ransomware-gang/
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- https://www.mcafee.com/blogs/other-blogs/mcafee-labs/mcafee-atr-analyzes-sodinokibi-aka-revil-ransomware-as-a-service-what-the-code-tells-us/
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tags:
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analytic_story:
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- Ransomware
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- Revil Ransomware
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- LockBit Ransomware
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confidence: 50
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context:
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- Source:Endpoint
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- Stage:Defense Evasion
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/revil/inf2/windows-sysmon.log
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impact: 70
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kill_chain_phases:
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- Exploitation
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message: Suspicious COM Object Execution on $Computer$
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mitre_attack_id:
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- T1218
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- T1218.003
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observable:
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- name: Computer
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type: Endpoint
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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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- Image
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- ImageLoaded
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- process_name
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- Computer
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- EventCode
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- Signed
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- ProcessId
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- Hashes
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- IMPHASH
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risk_score: 35
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security_domain: endpoint
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asset_type: Endpoint
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