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P4T12ICK
70 lines
2.3 KiB
YAML
70 lines
2.3 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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status: production
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type: TTP
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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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data_source:
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- Sysmon Event ID 1
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search:
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selection1:
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OriginalFileName: schtasks.exe
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selection2:
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Image|endswith: schtasks.exe
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selection3:
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CommandLine: '*/create *'
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selection4:
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CommandLine: '*/ru *'
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selection5:
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CommandLine: '*system*'
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condition: (selection1 or selection2) and selection3 and selection4 and selection5
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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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asset_type: Endpoint
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confidence: 60
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impact: 80
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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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risk_score: 48
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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/attack_techniques/T1053.005/schtask_system/windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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