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P4T12ICK
61 lines
2.1 KiB
YAML
61 lines
2.1 KiB
YAML
name: Revil Registry Entry
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id: e3d3f57a-c381-11eb-9e35-acde48001122
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version: 2
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date: '2021-01-26'
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author: Teoderick Contreras, Splunk
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status: production
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type: TTP
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description: This analytic identifies suspicious modification in registry entry to
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keep some malware data during its infection. This technique seen in several apt
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implant, malware and ransomware like REVIL where it keep some information like the
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random generated file extension it uses for all the encrypted files and ransomware
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notes file name in the compromised host.
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data_source:
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- Sysmon Event ID 13
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search:
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selection1:
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TargetObject:
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- '*\\SOFTWARE\\WOW6432Node\\Facebook_Assistant\\*'
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- '*\\SOFTWARE\\WOW6432Node\\BlackLivesMatter*'
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condition: (selection1)
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how_to_implement: to successfully implement this search, you need to be ingesting
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logs with the Image, TargetObject registry key, registry Details from your endpoints.
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If you are using Sysmon, you must have at least version 6.0.4 of the Sysmon TA.
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known_false_positives: unknown
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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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- Windows Registry Abuse
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asset_type: Endpoint
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confidence: 100
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impact: 60
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message: A registry entry $registry_path$ with registry value $registry_value_name$
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and $registry_value_name$ related to revil ransomware in host $dest$
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mitre_attack_id:
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- T1112
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observable:
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- name: dest
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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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risk_score: 60
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security_domain: endpoint
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tests:
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- name: True Positive Test
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attack_data:
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- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/revil/inf1/windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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