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https://github.com/splunk/security_content
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Eric McGinnis
53 lines
2.0 KiB
YAML
53 lines
2.0 KiB
YAML
name: Windows Diskshadow Proxy Execution
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id: aa502688-9037-11ec-842d-acde48001122
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version: 4
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date: '2022-02-17'
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author: Lou Stella, Splunk
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status: production
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type: Anomaly
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description: DiskShadow.exe is a Microsoft Signed binary present on Windows Server.
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It has a scripting mode intended for complex scripted backup operations. This feature
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also allows for execution of arbitrary unsigned code. This analytic looks for the
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usage of the scripting mode flags in executions of DiskShadow. During triage, compare
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to known backup behavior in your environment and then review the scripts called
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by diskshadow.
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data_source:
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- Windows Security 4688
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search:
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selection1:
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process.cmd_line|contains:
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- /s
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- -S
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process.file.name: diskshadow.exe
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condition: selection1
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how_to_implement: To successfully implement this search you need to be ingesting information
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on processes that include the name of the process responsible for the changes from
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your endpoints into the `Endpoint_Processess` datamodel.
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known_false_positives: Administrators using the DiskShadow tool in their infrastructure
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as a main backup tool with scripts will cause false positives
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references:
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- https://bohops.com/2018/03/26/diskshadow-the-return-of-vss-evasion-persistence-and-active-directory-database-extraction/
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tags:
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analytic_story:
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- Living Off The Land
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asset_type: Endpoint
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confidence: 70
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impact: 70
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message: An instance of $parent_process_name$ spawning $process_name$ was identified
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on endpoint $dest_device_id$ by user $dest_user_id$ attempting to run a script.
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mitre_attack_id:
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- T1218
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observable: []
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product:
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- Splunk Behavioral Analytics
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required_fields: []
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kill_chain_phases:
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- Exploitation
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risk_score: 49
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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/T1218/diskshadow/windows-security.log
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source: WinEventLog:Security
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