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https://github.com/splunk/security_content
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tccontre
70 lines
2.4 KiB
YAML
70 lines
2.4 KiB
YAML
name: WBAdmin Delete System Backups
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id: cd5aed7e-5cea-11eb-ae93-0242ac130002
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version: 1
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date: '2021-01-22'
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author: Michael Haag, Splunk
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type: TTP
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datamodel:
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- Endpoint
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description: This search looks for flags passed to wbadmin.exe (Windows Backup Administrator
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Tool) that delete backup files. This is typically used by ransomware to prevent
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recovery.
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search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
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as lastTime from datamodel=Endpoint.Processes where Processes.process_name=wbadmin.exe
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Processes.process="*delete*" AND (Processes.process="*catalog*" OR Processes.process="*systemstatebackup*")
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by Processes.process_name Processes.process Processes.parent_process_name Processes.dest
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Processes.user | `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`| `wbadmin_delete_system_backups_filter`'
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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
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- https://thedfirreport.com/2020/10/08/ryuks-return/
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- https://attack.mitre.org/techniques/T1490/
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- https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/wbadmin
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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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- Prestige Ransomware
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- Chaos Ransomware
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asset_type: Endpoint
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cis20:
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- CIS 8
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confidence: 50
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context:
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- Source:Endpoint
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- Stage:Defense Evasion
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1490/atomic_red_team/windows-sysmon.log
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impact: 30
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kill_chain_phases:
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- Actions on Objectives
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message: System backups deletion on $dest$
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mitre_attack_id:
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- T1490
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nist:
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- PR.IP
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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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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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required_fields:
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- _time
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- Processes.process_name
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- Processes.process
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- Processes.parent_process_name
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- Processes.dest
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- Processes.user
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risk_score: 15
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security_domain: endpoint
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supported_tas:
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- Splunk_TA_microsoft_sysmon
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