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P4T12ICK
77 lines
2.9 KiB
YAML
77 lines
2.9 KiB
YAML
name: Ryuk Wake on LAN Command
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id: 538d0152-7aaa-11eb-beaa-acde48001122
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version: 1
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date: '2021-03-01'
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author: Michael Haag, Splunk
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type: TTP
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datamodel:
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- Endpoint
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description: This Splunk query identifies the use of Wake-on-LAN utilized by Ryuk
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ransomware. The Ryuk Ransomware uses the Wake-on-Lan feature to turn on powered
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off devices on a compromised network to have greater success encrypting them. This
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is a high fidelity indicator of Ryuk ransomware executing on an endpoint. Upon triage,
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isolate the endpoint. Additional file modification events will be within the users
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profile (\appdata\roaming) and in public directories (users\public\). Review all
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Scheduled Tasks on the isolated endpoint and across the fleet. Suspicious Scheduled
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Tasks will include a path to a unknown binary and those endpoints should be isolated
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until triaged.
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search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
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as lastTime from datamodel=Endpoint.Processes where (Processes.process="*8 LAN*"
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OR Processes.process="*9 REP*") by Processes.dest Processes.user Processes.parent_process
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Processes.process_name Processes.process Processes.process_id Processes.parent_process_id
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| `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)`| `security_content_ctime(lastTime)`
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| `ryuk_wake_on_lan_command_filter`'
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how_to_implement: To successfully implement this search you need to be ingesting information
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on process that include the name of the process responsible for the changes from
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your endpoints into the `Endpoint` datamodel in the `Processes` node.
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known_false_positives: Limited to no known false positives.
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references:
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- https://www.bleepingcomputer.com/news/security/ryuk-ransomware-uses-wake-on-lan-to-encrypt-offline-devices/
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- https://www.bleepingcomputer.com/news/security/ryuk-ransomware-now-self-spreads-to-other-windows-lan-devices/
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- https://www.cert.ssi.gouv.fr/uploads/CERTFR-2021-CTI-006.pdf
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tags:
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analytic_story:
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- Ryuk Ransomware
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confidence: 90
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context:
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- Source:Endpoint
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- Stage:Execution
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1059.003/ryuk/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: A process $process_name$ with wake on LAN commandline $process$ in host
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$dest$
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mitre_attack_id:
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- T1059
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- T1059.003
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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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required_fields:
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- _time
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- Processes.process
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- Processes.dest
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- Processes.user
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- Processes.parent_process
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- Processes.process_name
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- Processes.process
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- Processes.process_id
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- Processes.parent_process_id
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risk_score: 63
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security_domain: endpoint
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supported_tas:
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- Splunk_TA_microsoft_sysmon
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asset_type: Endpoint
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