Analysis
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max time kernel
13s -
max time network
14s -
platform
windows7_x64 -
resource
win7v20210408 -
submitted
12-09-2021 05:25
Static task
static1
Behavioral task
behavioral1
Sample
8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe
Resource
win7v20210408
Behavioral task
behavioral2
Sample
8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe
Resource
win10-en
General
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Target
8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe
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Size
79KB
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MD5
de63e92d3c6735c5e31269678d2b9ea9
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SHA1
6f430f0efe373e5e4cab9c48bcef14460b7b4796
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SHA256
8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539
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SHA512
9d33340004965a97e56bfb02adb9bb575acc349021ff306c18f7d3d9792a518ee48ab0e09a1bd82346cb1a4d59e3f9baf66797a4612a2ce304f0b83fe94a6993
Malware Config
Extracted
C:\1rWCqamCt.README.txt
blackmatter
http://supp24maprinktc7uizgfyqhisx7lkszb6ogh6lwdzpac23w3mh4tvyd.onion/6O5KBMY42CFGLLU7L2MW4
Signatures
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BlackMatter Ransomware
BlackMatter ransomware group claims to be Darkside and REvil succesor.
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Modifies extensions of user files 16 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File opened for modification C:\Users\Admin\Pictures\BackupClose.crw.1rWCqamCt 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe File opened for modification C:\Users\Admin\Pictures\EnableReset.tif.1rWCqamCt 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe File renamed C:\Users\Admin\Pictures\GetSkip.raw => C:\Users\Admin\Pictures\GetSkip.raw.1rWCqamCt 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe File opened for modification C:\Users\Admin\Pictures\WatchConvert.tiff.1rWCqamCt 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe File renamed C:\Users\Admin\Pictures\BackupClose.crw => C:\Users\Admin\Pictures\BackupClose.crw.1rWCqamCt 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe File renamed C:\Users\Admin\Pictures\EnableReset.tif => C:\Users\Admin\Pictures\EnableReset.tif.1rWCqamCt 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe File opened for modification C:\Users\Admin\Pictures\GetSkip.raw.1rWCqamCt 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe File opened for modification C:\Users\Admin\Pictures\ApproveExport.tiff 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe File opened for modification C:\Users\Admin\Pictures\WatchConvert.tiff 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe File renamed C:\Users\Admin\Pictures\WatchConvert.tiff => C:\Users\Admin\Pictures\WatchConvert.tiff.1rWCqamCt 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe File renamed C:\Users\Admin\Pictures\UpdateStart.tif => C:\Users\Admin\Pictures\UpdateStart.tif.1rWCqamCt 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe File opened for modification C:\Users\Admin\Pictures\ApproveExport.tiff.1rWCqamCt 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe File renamed C:\Users\Admin\Pictures\BlockRevoke.crw => C:\Users\Admin\Pictures\BlockRevoke.crw.1rWCqamCt 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe File opened for modification C:\Users\Admin\Pictures\BlockRevoke.crw.1rWCqamCt 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe File opened for modification C:\Users\Admin\Pictures\UpdateStart.tif.1rWCqamCt 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe File renamed C:\Users\Admin\Pictures\ApproveExport.tiff => C:\Users\Admin\Pictures\ApproveExport.tiff.1rWCqamCt 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe -
Sets desktop wallpaper using registry 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\1rWCqamCt.bmp" 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\1rWCqamCt.bmp" 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
pid Process 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe -
Modifies Control Panel 2 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Control Panel\Desktop 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Control Panel\Desktop\WallpaperStyle = "10" 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe -
Suspicious use of AdjustPrivilegeToken 17 IoCs
description pid Process Token: SeBackupPrivilege 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe Token: SeDebugPrivilege 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe Token: 36 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe Token: SeImpersonatePrivilege 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe Token: SeIncBasePriorityPrivilege 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe Token: SeIncreaseQuotaPrivilege 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe Token: 33 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe Token: SeManageVolumePrivilege 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe Token: SeProfSingleProcessPrivilege 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe Token: SeRestorePrivilege 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe Token: SeSecurityPrivilege 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe Token: SeSystemProfilePrivilege 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe Token: SeTakeOwnershipPrivilege 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe Token: SeShutdownPrivilege 1088 8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe Token: SeBackupPrivilege 1420 vssvc.exe Token: SeRestorePrivilege 1420 vssvc.exe Token: SeAuditPrivilege 1420 vssvc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe"C:\Users\Admin\AppData\Local\Temp\8f1b0affffb2f2f58b477515d1ce54f4daa40a761d828041603d5536c2d53539.exe"1⤵
- Modifies extensions of user files
- Sets desktop wallpaper using registry
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Modifies Control Panel
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1088
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1420