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https://github.com/splunk/security_content
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tccontre
79 lines
2.9 KiB
YAML
79 lines
2.9 KiB
YAML
name: Windows Schtasks Create Run As System
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id: 41a0e58e-884c-11ec-9976-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 Schtasks.exe creating a new task to
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start and run as an elevated user - SYSTEM. This is commonly used by adversaries
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to spawn a process in an elevated state.
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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 `process_schtasks` Processes.process="*/create
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*" AND Processes.process="*/ru *" AND Processes.process="*system*" by Processes.dest
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Processes.user Processes.parent_process_name Processes.process_name Processes.original_file_name
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Processes.process Processes.process_id Processes.parent_process_id | `drop_dm_object_name(Processes)`
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| `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `windows_schtasks_create_run_as_system_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 will be limited to legitimate applications
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creating a task to run as SYSTEM. Filter as needed based on parent process, or modify
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the query to have world writeable paths to restrict it.
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references:
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- https://pentestlab.blog/2019/11/04/persistence-scheduled-tasks/
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- https://www.ired.team/offensive-security/persistence/t1053-schtask
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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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- Windows Persistence Techniques
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- Qakbot
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confidence: 60
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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/T1053.005/schtask_system/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 $process_name$ was created on endpoint $dest$ attempting to spawn as
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SYSTEM.
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mitre_attack_id:
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- T1053.005
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- T1053
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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: 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: 48
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security_domain: endpoint
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asset_type: Endpoint
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supported_tas:
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- Splunk_TA_microsoft_sysmon
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