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P4T12ICK
68 lines
2.6 KiB
YAML
68 lines
2.6 KiB
YAML
name: Windows Cached Domain Credentials Reg Query
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id: 40ccb8e0-1785-466e-901e-6a8b75c04ecd
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version: 1
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date: '2022-11-30'
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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: The following analytic identifies a process command line related to the
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discovery of cache domain credential logon count in the registry. This Technique
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was being abused by several post exploitation tool like Winpeas where it query CachedLogonsCount
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registry value in Winlogon registry. This value can be good information about the
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login caching setting on the Windows OS target host. A value of 0 means login caching
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is disable and values > 50 caches only 50 login attempts. By default all versions
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of Windows 10 save cached logins except Windows Server 2008.
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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: '* query *'
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selection4:
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CommandLine: '*\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon*'
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selection5:
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CommandLine: '*CACHEDLOGONSCOUNT*'
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condition: (selection1 or selection2) and selection3 and selection4 and selection5
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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: unknown
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references:
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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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- https://learn.microsoft.com/de-de/troubleshoot/windows-server/user-profiles-and-logon/cached-domain-logon-information
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- https://github.com/carlospolop/PEASS-ng/tree/master/winPEAS
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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: a process with commandline $process$ tries to retrieve cache domain credential
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logon count in $dest$
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mitre_attack_id:
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- T1003.005
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- T1003
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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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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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