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P4T12ICK
57 lines
1.9 KiB
YAML
57 lines
1.9 KiB
YAML
name: Windows Regsvr32 Renamed Binary
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id: 7349a9e9-3cf6-4171-bb0c-75607a8dcd1a
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version: 1
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date: '2022-10-27'
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author: Teoderick Contreras, Splunk
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status: production
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type: TTP
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description: The following hunting analytic identifies renamed instances of regsv32.exe
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executing. regsv32.exe is natively found in C:\Windows\system32 and C:\Windows\syswow64.
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During investigation, validate if it is the legitimate regsv32.exe executing and
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what dll module content it is loading. This query relies on the original filename
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or internal name from the PE meta data. Expand the query as needed by looking for
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specific command line arguments outlined in other analytics.
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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: regsvr32.exe
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Image|endswith: regsvr32.exe
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condition: selection1
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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 process responsible for the changes from
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your endpoints into the `Endpoint` datamodel in the `Processes` node. In addition,
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confirm the latest CIM App 4.20 or higher is installed and the latest TA for the
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endpoint product.
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known_false_positives: unknown
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references:
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- https://twitter.com/pr0xylife/status/1585612370441031680?s=46&t=Dc3CJi4AnM-8rNoacLbScg
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tags:
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analytic_story:
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- Qakbot
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asset_type: Endpoint
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confidence: 80
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impact: 80
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message: regsvr32 was renamed as $process_name$ in $dest$
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mitre_attack_id:
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- T1218.010
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- T1218
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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: 64
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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/qakbot/qbot_3/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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