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P4T12ICK
79 lines
2.9 KiB
YAML
79 lines
2.9 KiB
YAML
name: Windows Remote Assistance Spawning Process
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id: ced50492-8849-11ec-9f68-acde48001122
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version: 1
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date: '2022-02-07'
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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: The following analytic identifies the use of Microsoft Remote Assistance,
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msra.exe, spawning PowerShell.exe or cmd.exe as a child process. Msra.exe by default
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has no command-line arguments and typically spawns itself. It will generate a network
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connection to the remote system that is connected. This behavior is indicative of
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another process injected into msra.exe. Review the parent process or cross process
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events to identify source.
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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.parent_process_name=msra.exe
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`windows_shells` by Processes.dest Processes.user Processes.parent_process_name
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Processes.process_name Processes.original_file_name Processes.process Processes.process_id
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Processes.parent_process_id | `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)` | `windows_remote_assistance_spawning_process_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. In addition,
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confirm the latest CIM App 4.20 or higher is installed and the latest TA for the
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endpoint product.
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known_false_positives: False positives should be limited, filter as needed. Add additional
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shells as needed.
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references:
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- https://thedfirreport.com/2022/02/07/qbot-likes-to-move-it-move-it/
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tags:
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analytic_story:
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- Unusual Processes
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confidence: 100
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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/attack_techniques/T1055/msra/msra-windows-sysmon.log
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impact: 80
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kill_chain_phases:
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- Exploitation
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message: An instance of $parent_process_name$ spawning $process_name$ was identified
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on endpoint $dest$, generating behavior not common with msra.exe.
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mitre_attack_id:
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- T1055
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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: 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: 80
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security_domain: endpoint
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asset_type: Endpoint
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