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https://github.com/splunk/security_content
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Bhavin Patel
74 lines
2.4 KiB
YAML
74 lines
2.4 KiB
YAML
name: System Processes Run From Unexpected Locations
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id: a34aae96-ccf8-4aef-952c-3ea21444444d
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version: 6
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date: '2020-12-08'
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author: David Dorsey, Michael Haag, Splunk
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status: production
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type: Anomaly
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description: 'This search looks for system processes that typically execute from `C:\Windows\System32\`
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or `C:\Windows\SysWOW64`. This may indicate a malicious process that is trying
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to hide as a legitimate process.
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This detection utilizes a lookup that is deduped `system32` and `syswow64` directories
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from Server 2016 and Windows 10.
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During triage, review the parallel processes - what process moved the native Windows
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binary? identify any artifacts on disk and review. If a remote destination is contacted,
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what is the reputation?'
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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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Processes.process_path: C:\\Windows\\SysWOW64*
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selection2:
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Processes.process_path: C:\\Windows\\System32*
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condition: selection1 and selection2
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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: This detection may require tuning based on third party applications
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utilizing native Windows binaries in non-standard paths.
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references:
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- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1036.003/T1036.003.yaml
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- https://attack.mitre.org/techniques/T1036/003/
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tags:
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analytic_story:
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- Suspicious Command-Line Executions
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- Unusual Processes
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- Ransomware
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- Masquerading - Rename System Utilities
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- Qakbot
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asset_type: Endpoint
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confidence: 50
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impact: 60
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message: A System process $process_name$ is running from $process_path$ on $dest$,
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potentially non-standard.
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mitre_attack_id:
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- T1036
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- T1036.003
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observable:
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- name: dest
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type: Endpoint
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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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- name: process_path
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type: Other
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role:
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- Other
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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: 30
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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/T1036.003/atomic_red_team/windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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