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P4T12ICK
60 lines
2.3 KiB
YAML
60 lines
2.3 KiB
YAML
name: Windows Disable Shutdown Button Through Registry
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id: 55fb2958-9ecd-11ec-a06a-acde48001122
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version: 1
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date: '2022-03-08'
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author: Teoderick Contreras, Splunk
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status: production
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type: Anomaly
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description: This analytic is to detect a suspicious registry modification to disable
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shutdown button on the logon user. This technique was seen in several malware especially
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in ransomware family like killdisk malware variant to make the compromised host
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un-useful and hard to remove other registry modification made on the machine that
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needs restart to take effect. This windows feature may implement by administrator
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in some server where shutdown is critical. In that scenario filter of machine and
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users that can modify this registry is needed.
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data_source:
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- Sysmon Event ID 13
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search:
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selection1:
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Details: '0x00000000'
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TargetObject: '*\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\System\\shutdownwithoutlogon'
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selection2:
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Details: '0x00000001'
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TargetObject: '*\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\NoClose'
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condition: selection1 or 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 Filesystem responsible for the changes from
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your endpoints into the `Endpoint` datamodel in the `Processes` and `Registry` node.
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known_false_positives: This windows feature may implement by administrator in some
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server where shutdown is critical. In that scenario filter of machine and users
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that can modify this registry is needed.
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references:
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- https://www.trendmicro.com/vinfo/us/threat-encyclopedia/malware/ransom.msil.screenlocker.a/
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tags:
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analytic_story:
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- Ransomware
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- Windows Registry Abuse
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asset_type: Endpoint
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confidence: 70
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impact: 70
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message: Registry modification in "shutdownwithoutlogon" on $dest$
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mitre_attack_id:
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- T1112
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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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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/T1112/ransomware_disable_reg/sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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