LOLBAS/yml/OSBinaries/Regsvcs.yml

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---
Name: Regsvcs.exe
Description: Regsvcs and Regasm are Windows command-line utilities that are used to register .NET Component Object Model (COM) assemblies
Author: 'Oddvar Moe'
Created: 2018-05-25
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Commands:
- Command: regsvcs.exe AllTheThingsx64.dll
Description: Loads the target .DLL file and executes the RegisterClass function.
Usecase: Execute dll file and bypass Application whitelisting
Category: Execute
Privileges: Local Admin
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MitreID: T1218.009
OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
- Command: regsvcs.exe AllTheThingsx64.dll
Description: Loads the target .DLL file and executes the RegisterClass function.
Usecase: Execute dll file and bypass Application whitelisting
Category: AWL Bypass
Privileges: Local Admin
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MitreID: T1218.009
OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
Full_Path:
- Path: C:\Windows\System32\regsvcs.exe
- Path: C:\Windows\SysWOW64\regsvcs.exe
Code_Sample:
- Code:
Detection:
- Sigma: https://github.com/SigmaHQ/sigma/blob/a04fbe2a99f1dcbbfeb0ee4957ae4b06b0866254/rules/windows/process_creation/win_possible_applocker_bypass.yml
- Elastic: https://github.com/elastic/detection-rules/blob/12577f7380f324fcee06dab3218582f4a11833e7/rules/windows/execution_register_server_program_connecting_to_the_internet.toml
- Splunk: https://github.com/splunk/security_content/blob/bee2a4cefa533f286c546cbe6798a0b5dec3e5ef/detections/endpoint/detect_regsvcs_with_network_connection.yml
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Resources:
- Link: https://pentestlab.blog/2017/05/19/applocker-bypass-regasm-and-regsvcs/
- Link: https://oddvar.moe/2017/12/13/applocker-case-study-how-insecure-is-it-really-part-1/
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- Link: https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1218.009/T1218.009.md
Acknowledgement:
- Person: Casey Smith
Handle: '@subtee'