Analysis
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max time kernel
82s -
max time network
147s -
platform
windows10_x64 -
resource
win10-en -
submitted
20-09-2021 12:44
Static task
static1
Behavioral task
behavioral1
Sample
v2c.bin.exe
Resource
win7v20210408
Behavioral task
behavioral2
Sample
v2c.bin.exe
Resource
win10-en
General
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Target
v2c.bin.exe
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Size
80KB
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MD5
cdece7491402c7cb06964ffc680d791a
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SHA1
8c5427baa48d840bc7508eeaa7c091d368a68e0a
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SHA256
b0e929e35c47a60f65e4420389cad46190c26e8cfaabe922efd73747b682776a
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SHA512
5ff6eb1f81bb309aede35a9aef26ea587b6c2e49bea66f6e91bf1dbc02cc978869a1bfd376b524522cc8bf99f48ee7f62db9322212342bc4d7af40984290e501
Malware Config
Extracted
C:\fViGXl6GW.README.txt
blackmatter
http://supp24maprinktc7uizgfyqhisx7lkszb6ogh6lwdzpac23w3mh4tvyd.onion/9YDGH04DC6ZS7RP0085Q
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 13 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
v2c.bin.exedescription ioc process File opened for modification C:\Users\Admin\Pictures\ConvertToGroup.png.fViGXl6GW v2c.bin.exe File opened for modification C:\Users\Admin\Pictures\EnableUnblock.tiff.fViGXl6GW v2c.bin.exe File opened for modification C:\Users\Admin\Pictures\LimitInstall.raw.fViGXl6GW v2c.bin.exe File renamed C:\Users\Admin\Pictures\SyncUninstall.png => C:\Users\Admin\Pictures\SyncUninstall.png.fViGXl6GW v2c.bin.exe File renamed C:\Users\Admin\Pictures\ConvertFromTest.raw => C:\Users\Admin\Pictures\ConvertFromTest.raw.fViGXl6GW v2c.bin.exe File opened for modification C:\Users\Admin\Pictures\ConvertFromTest.raw.fViGXl6GW v2c.bin.exe File renamed C:\Users\Admin\Pictures\ConvertSkip.crw => C:\Users\Admin\Pictures\ConvertSkip.crw.fViGXl6GW v2c.bin.exe File opened for modification C:\Users\Admin\Pictures\ConvertSkip.crw.fViGXl6GW v2c.bin.exe File opened for modification C:\Users\Admin\Pictures\SyncUninstall.png.fViGXl6GW v2c.bin.exe File renamed C:\Users\Admin\Pictures\ConvertToGroup.png => C:\Users\Admin\Pictures\ConvertToGroup.png.fViGXl6GW v2c.bin.exe File opened for modification C:\Users\Admin\Pictures\EnableUnblock.tiff v2c.bin.exe File renamed C:\Users\Admin\Pictures\EnableUnblock.tiff => C:\Users\Admin\Pictures\EnableUnblock.tiff.fViGXl6GW v2c.bin.exe File renamed C:\Users\Admin\Pictures\LimitInstall.raw => C:\Users\Admin\Pictures\LimitInstall.raw.fViGXl6GW v2c.bin.exe -
Enumerates connected drives 3 TTPs 1 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
v2c.bin.exedescription ioc process File opened (read-only) \??\Z: v2c.bin.exe -
Sets desktop wallpaper using registry 2 TTPs 2 IoCs
Processes:
v2c.bin.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2559286294-2439613352-4032193287-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\fViGXl6GW.bmp" v2c.bin.exe Set value (str) \REGISTRY\USER\S-1-5-21-2559286294-2439613352-4032193287-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\fViGXl6GW.bmp" v2c.bin.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
Processes:
v2c.bin.exepid process 3996 v2c.bin.exe 3996 v2c.bin.exe 3996 v2c.bin.exe 3996 v2c.bin.exe 3996 v2c.bin.exe 3996 v2c.bin.exe -
Modifies Control Panel 3 IoCs
Processes:
v2c.bin.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2559286294-2439613352-4032193287-1000\Control Panel\Desktop\WallpaperStyle = "10" v2c.bin.exe Key created \REGISTRY\USER\S-1-5-21-2559286294-2439613352-4032193287-1000\Control Panel\International v2c.bin.exe Key created \REGISTRY\USER\S-1-5-21-2559286294-2439613352-4032193287-1000\Control Panel\Desktop v2c.bin.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
v2c.bin.exepid process 3996 v2c.bin.exe 3996 v2c.bin.exe 3996 v2c.bin.exe 3996 v2c.bin.exe -
Suspicious use of AdjustPrivilegeToken 17 IoCs
Processes:
v2c.bin.exevssvc.exedescription pid process Token: SeBackupPrivilege 3996 v2c.bin.exe Token: SeDebugPrivilege 3996 v2c.bin.exe Token: 36 3996 v2c.bin.exe Token: SeImpersonatePrivilege 3996 v2c.bin.exe Token: SeIncBasePriorityPrivilege 3996 v2c.bin.exe Token: SeIncreaseQuotaPrivilege 3996 v2c.bin.exe Token: 33 3996 v2c.bin.exe Token: SeManageVolumePrivilege 3996 v2c.bin.exe Token: SeProfSingleProcessPrivilege 3996 v2c.bin.exe Token: SeRestorePrivilege 3996 v2c.bin.exe Token: SeSecurityPrivilege 3996 v2c.bin.exe Token: SeSystemProfilePrivilege 3996 v2c.bin.exe Token: SeTakeOwnershipPrivilege 3996 v2c.bin.exe Token: SeShutdownPrivilege 3996 v2c.bin.exe Token: SeBackupPrivilege 3876 vssvc.exe Token: SeRestorePrivilege 3876 vssvc.exe Token: SeAuditPrivilege 3876 vssvc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\v2c.bin.exe"C:\Users\Admin\AppData\Local\Temp\v2c.bin.exe"1⤵
- Modifies extensions of user files
- Enumerates connected drives
- Sets desktop wallpaper using registry
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Modifies Control Panel
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken