2018-06-09 00:15:06 +02:00
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Name: Certutil.exe
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2018-09-24 01:50:14 +02:00
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Description: Windows binary used for handeling certificates
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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: certutil.exe -urlcache -split -f http://7-zip.org/a/7z1604-x64.exe 7zip.exe
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Description: Download and save 7zip to disk in the current folder.
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2018-09-24 01:50:14 +02:00
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Usecase: Download file from Internet
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Category: Download
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Privileges: User
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MitreID: T1105
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MitreLink: https://attack.mitre.org/wiki/Technique/T1105
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OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
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2019-01-24 11:52:25 +01:00
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- Command: certutil.exe -verifyctl -f -split http://7-zip.org/a/7z1604-x64.exe 7zip.exe
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2019-01-24 10:40:45 +01:00
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Description: Download and save 7zip to disk in the current folder.
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Usecase: Download file from Internet
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Category: Download
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Privileges: User
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MitreID: T1105
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MitreLink: https://attack.mitre.org/wiki/Technique/T1105
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OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
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2018-09-24 23:18:00 +02:00
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- Command: certutil.exe -urlcache -split -f https://raw.githubusercontent.com/Moriarty2016/git/master/test.ps1 c:\temp:ttt
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2018-06-09 00:15:06 +02:00
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Description: Download and save a PS1 file to an Alternate Data Stream (ADS).
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2018-09-24 01:50:14 +02:00
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Usecase: Download file from Internet and save it in an NTFS Alternate Data Stream
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2018-09-26 09:34:01 +02:00
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Category: ADS
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2018-09-24 01:50:14 +02:00
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Privileges: User
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2020-07-03 16:35:01 +02:00
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MitreID: T1096
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MitreLink: https://attack.mitre.org/techniques/T1096
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2018-09-24 01:50:14 +02:00
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OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
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2018-09-24 23:18:00 +02:00
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- Command: certutil -encode inputFileName encodedOutputFileName
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2018-09-24 01:50:14 +02:00
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Description: Command to encode a file using Base64
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Usecase: Encode files to evade defensive measures
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Category: Encode
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Privileges: User
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MitreID: T1027
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MitreLink: https://attack.mitre.org/wiki/Technique/T1027
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OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
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2018-09-24 23:18:00 +02:00
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- Command: certutil -decode encodedInputFileName decodedOutputFileName
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2018-09-24 01:50:14 +02:00
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Description: Command to decode a Base64 encoded file.
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Usecase: Decode files to evade defensive measures
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Category: Decode
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Privileges: User
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MitreID: T1140
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MitreLink: https://attack.mitre.org/wiki/Technique/T1140
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OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
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2020-10-26 07:57:42 +01:00
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- Command: certutil --decodehex encoded_hexadecimal_InputFileName
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Description: Command to decode a hexadecimal-encoded file decodedOutputFileName
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Usecase: Decode files to evade defensive measures
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Category: Decode
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Privileges: User
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MitreID: T1140
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MitreLink: https://attack.mitre.org/wiki/Technique/T1140
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OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
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2018-12-10 14:28:12 +01:00
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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\certutil.exe
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- Path: C:\Windows\SysWOW64\certutil.exe
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2018-12-10 14:28:12 +01:00
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Code_Sample:
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2018-09-24 23:18:00 +02:00
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- Code:
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2018-09-24 01:50:14 +02:00
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Detection:
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2018-09-24 23:18:00 +02:00
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- IOC: Certutil.exe creating new files on disk
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- IOC: Useragent Microsoft-CryptoAPI/10.0
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- IOC: Useragent CertUtil URL Agent
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2018-06-09 00:15:06 +02:00
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Resources:
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2018-09-24 01:50:14 +02:00
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- Link: https://twitter.com/Moriarty_Meng/status/984380793383370752
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- Link: https://twitter.com/mattifestation/status/620107926288515072
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2019-01-24 10:40:45 +01:00
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- Link: https://twitter.com/egre55/status/1087685529016193025
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2018-09-24 01:50:14 +02:00
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Acknowledgement:
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- Person: Matt Graeber
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Handle: '@mattifestation'
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- Person: Moriarty
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2018-12-10 21:21:34 +01:00
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Handle: '@Moriarty_Meng'
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2019-01-24 10:40:45 +01:00
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- Person: egre55
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Handle: '@egre55'
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2020-10-26 07:57:42 +01:00
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- Person: Lior Adar
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2018-09-24 01:50:14 +02:00
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---
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