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P4T12ICK
68 lines
2.0 KiB
YAML
68 lines
2.0 KiB
YAML
name: BCDEdit Failure Recovery Modification
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id: 809b31d2-5462-11eb-ae93-0242ac130002
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version: 1
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date: '2020-12-21'
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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: This search looks for flags passed to bcdedit.exe modifications to the
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built-in Windows error recovery boot configurations. This is typically used by ransomware
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to prevent recovery.
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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: '*recoveryenabled*'
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Image|endswith: bcdedit.exe
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selection2:
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CommandLine: '* no*'
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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. Tune based on parent process names.
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known_false_positives: Administrators may modify the boot configuration.
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references:
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- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1490/T1490.md#atomic-test-4---windows---disable-windows-recovery-console-repair
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tags:
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analytic_story:
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- Ryuk Ransomware
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- Ransomware
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asset_type: Endpoint
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confidence: 80
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impact: 100
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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 disable the ability to recover the
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endpoint.
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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: 80
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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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update_timestamp: true
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