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P4T12ICK
74 lines
2.2 KiB
YAML
74 lines
2.2 KiB
YAML
name: Deleting Shadow Copies
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id: b89919ed-ee5f-492c-b139-95dbb162039e
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version: 4
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date: '2020-11-09'
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author: David Dorsey, Splunk
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status: production
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type: TTP
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description: The vssadmin.exe utility is used to interact with the Volume Shadow Copy
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Service. Wmic is an interface to the Windows Management Instrumentation. This
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search looks for either of these tools being used to delete shadow copies.
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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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CommandLine: '*delete*'
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Image|endswith:
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- wmic.exe
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- vssadmin.exe
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selection2:
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CommandLine: '*shadow*'
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condition: selection1 and selection2
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how_to_implement: You must be ingesting endpoint data that tracks process activity,
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including parent-child relationships from your endpoints to populate the Endpoint
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data model in the Processes node. The command-line arguments are mapped to the "process"
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field in the Endpoint data model.
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known_false_positives: vssadmin.exe and wmic.exe are standard applications shipped
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with modern versions of windows. They may be used by administrators to legitimately
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delete old backup copies, although this is typically rare.
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references: []
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tags:
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analytic_story:
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- Windows Log Manipulation
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- SamSam Ransomware
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- Ransomware
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- Clop Ransomware
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- CISA AA22-264A
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- Prestige Ransomware
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asset_type: Endpoint
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confidence: 90
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impact: 90
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message: An instance of $parent_process_name$ spawning $process_name$ was identified
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on endpoint $dest$ by user $user$ attempting to delete shadow copies.
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mitre_attack_id:
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- T1490
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observable:
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- name: user
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type: User
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role:
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- Victim
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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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risk_score: 81
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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/T1490/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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