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P4T12ICK
67 lines
2.4 KiB
YAML
67 lines
2.4 KiB
YAML
name: Windows Query Registry Reg Save
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id: cbee60c1-b776-456f-83c2-faa56bdbe6c6
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version: 1
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date: '2022-12-12'
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author: Teoderick Contreras, Splunk
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status: production
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type: Hunting
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description: The following analytic identifies a process execution of reg.exe with
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"save" parameter. This reg.exe parameter is commonly being abused by threat actors,
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adversaries and red-teamers to dump credentials or to check the registry modification
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capabilities of certain users or administrators in targeted hosts. This approach
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was seen in post-exploitation tool like winpeas where it uses "reg save" and "reg
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restore" to check registry modification restriction in targeted host after gaining
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access to it.
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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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OriginalFileName: reg.exe
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selection2:
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Image|endswith: reg.exe
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selection3:
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CommandLine: '* save *'
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condition: (selection1 or selection2) and selection3
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how_to_implement: To successfully implement this search, you need to be ingesting
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logs with the process name, parent process, and command-line executions from your
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endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the
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Sysmon TA. Tune and filter known instances of wermgr.exe may be used.
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known_false_positives: network administrator can use this command tool to backup registry
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before updates or modifying critical registries.
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references:
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- https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/quser
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- https://github.com/carlospolop/PEASS-ng/tree/master/winPEAS
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- https://www.microsoft.com/en-us/security/blog/2022/10/14/new-prestige-ransomware-impacts-organizations-in-ukraine-and-poland/
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tags:
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analytic_story:
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- Windows Post-Exploitation
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- Prestige Ransomware
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asset_type: Endpoint
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confidence: 30
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impact: 30
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message: execution of process $process_name$ in $dest$
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mitre_attack_id:
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- T1012
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observable:
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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: user
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type: User
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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: 9
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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/malware/winpeas/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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