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P4T12ICK
81 lines
2.7 KiB
YAML
81 lines
2.7 KiB
YAML
name: Conti Common Exec parameter
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id: 624919bc-c382-11eb-adcc-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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status: production
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type: TTP
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description: This search detects the suspicious commandline argument of revil ransomware
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to encrypt specific or all local drive and network shares of the compromised machine
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or host.
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data_source:
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- Sysmon Event ID 1
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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 = "*-m local*"
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OR Processes.process = "*-m net*" OR Processes.process = "*-m all*" OR Processes.process
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= "*-nomutex*" by Processes.process_name Processes.process Processes.parent_process_name
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Processes.parent_process Processes.dest Processes.user Processes.process_id Processes.process_guid
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| `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
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| `conti_common_exec_parameter_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: 3rd party tool may have commandline parameter that can trigger
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this detection.
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references:
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- https://malpedia.caad.fkie.fraunhofer.de/details/win.conti
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tags:
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analytic_story:
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- Ransomware
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asset_type: Endpoint
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confidence: 80
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impact: 80
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message: An instance of $parent_process_name$ spawning $process_name$ was identified
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on endpoint $dest$ by user $user$ executing specific Conti Ransomware related
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parameters.
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mitre_attack_id:
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- T1204
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observable:
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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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- name: dest
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type: Hostname
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role:
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- Victim
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- name: parent_process_name
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type: Process
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role:
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- Parent Process
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- name: process_name
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type: Process
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role:
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- Child Process
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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.dest
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- Processes.user
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- Processes.parent_process_name
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- Processes.parent_process
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- Processes.original_file_name
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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_path
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- Processes.process_path
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- Processes.parent_process_id
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risk_score: 64
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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/conti/inf1/windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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