Resubmissions
31-08-2021 13:22
210831-v7yp62p3a2 1003-08-2021 06:34
210803-w6vry4xe5x 1002-08-2021 18:36
210802-whb9t8hbz6 10Analysis
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max time kernel
66s -
max time network
114s -
platform
windows10_x64 -
resource
win10v20210410 -
submitted
31-08-2021 13:22
Static task
static1
Behavioral task
behavioral1
Sample
Windows.Encryptor.exe
Resource
win7v20210408
Behavioral task
behavioral2
Sample
Windows.Encryptor.exe
Resource
win10v20210410
General
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Target
Windows.Encryptor.exe
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Size
66KB
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MD5
ba375d0625001102fc1f2ccb6f582d91
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SHA1
379ebd1eff6f8685f4ff72657626bf6df5383d87
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SHA256
c6e2ef30a86baa670590bd21acf5b91822117e0cbe6060060bc5fe0182dace99
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SHA512
795b10a638e289729192de6a6d9964b5ad3b8084f84d58da077ca8ec08c8b8cb1acadb5240962d4ccacf66242bab1430923fc77bdbbfacd0badd64df2ba1487f
Malware Config
Extracted
C:\oSPvdHTvI.README.txt
blackmatter
http://supp24yy6a66hwszu2piygicgwzdtbwftb76htfj7vnip3getgqnzxid.onion/GDBJS76DH3D4IKQD2QO7R
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 22 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
Windows.Encryptor.exedescription ioc process File opened for modification C:\Users\Admin\Pictures\InvokeSubmit.tiff Windows.Encryptor.exe File opened for modification C:\Users\Admin\Pictures\MoveDisable.raw.oSPvdHTvI Windows.Encryptor.exe File opened for modification C:\Users\Admin\Pictures\SuspendApprove.tif.oSPvdHTvI Windows.Encryptor.exe File opened for modification C:\Users\Admin\Pictures\SyncAdd.tiff Windows.Encryptor.exe File renamed C:\Users\Admin\Pictures\InitializeStep.raw => C:\Users\Admin\Pictures\InitializeStep.raw.oSPvdHTvI Windows.Encryptor.exe File renamed C:\Users\Admin\Pictures\InstallDisconnect.crw => C:\Users\Admin\Pictures\InstallDisconnect.crw.oSPvdHTvI Windows.Encryptor.exe File opened for modification C:\Users\Admin\Pictures\ResetInitialize.png.oSPvdHTvI Windows.Encryptor.exe File opened for modification C:\Users\Admin\Pictures\RestoreNew.tif.oSPvdHTvI Windows.Encryptor.exe File opened for modification C:\Users\Admin\Pictures\InstallDisconnect.crw.oSPvdHTvI Windows.Encryptor.exe File renamed C:\Users\Admin\Pictures\MoveDisable.raw => C:\Users\Admin\Pictures\MoveDisable.raw.oSPvdHTvI Windows.Encryptor.exe File renamed C:\Users\Admin\Pictures\SubmitInitialize.png => C:\Users\Admin\Pictures\SubmitInitialize.png.oSPvdHTvI Windows.Encryptor.exe File opened for modification C:\Users\Admin\Pictures\SubmitInitialize.png.oSPvdHTvI Windows.Encryptor.exe File renamed C:\Users\Admin\Pictures\SuspendApprove.tif => C:\Users\Admin\Pictures\SuspendApprove.tif.oSPvdHTvI Windows.Encryptor.exe File opened for modification C:\Users\Admin\Pictures\SyncAdd.tiff.oSPvdHTvI Windows.Encryptor.exe File renamed C:\Users\Admin\Pictures\ResetInitialize.png => C:\Users\Admin\Pictures\ResetInitialize.png.oSPvdHTvI Windows.Encryptor.exe File renamed C:\Users\Admin\Pictures\RestoreNew.tif => C:\Users\Admin\Pictures\RestoreNew.tif.oSPvdHTvI Windows.Encryptor.exe File opened for modification C:\Users\Admin\Pictures\InvokeSubmit.tiff.oSPvdHTvI Windows.Encryptor.exe File renamed C:\Users\Admin\Pictures\SyncAdd.tiff => C:\Users\Admin\Pictures\SyncAdd.tiff.oSPvdHTvI Windows.Encryptor.exe File renamed C:\Users\Admin\Pictures\WatchInvoke.raw => C:\Users\Admin\Pictures\WatchInvoke.raw.oSPvdHTvI Windows.Encryptor.exe File opened for modification C:\Users\Admin\Pictures\WatchInvoke.raw.oSPvdHTvI Windows.Encryptor.exe File opened for modification C:\Users\Admin\Pictures\InitializeStep.raw.oSPvdHTvI Windows.Encryptor.exe File renamed C:\Users\Admin\Pictures\InvokeSubmit.tiff => C:\Users\Admin\Pictures\InvokeSubmit.tiff.oSPvdHTvI Windows.Encryptor.exe -
Enumerates connected drives 3 TTPs 1 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
Windows.Encryptor.exedescription ioc process File opened (read-only) \??\Z: Windows.Encryptor.exe -
Sets desktop wallpaper using registry 2 TTPs 2 IoCs
Processes:
Windows.Encryptor.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\oSPvdHTvI.bmp" Windows.Encryptor.exe Set value (str) \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\oSPvdHTvI.bmp" Windows.Encryptor.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
Processes:
Windows.Encryptor.exepid process 4056 Windows.Encryptor.exe 4056 Windows.Encryptor.exe 4056 Windows.Encryptor.exe 4056 Windows.Encryptor.exe 4056 Windows.Encryptor.exe 4056 Windows.Encryptor.exe -
Modifies Control Panel 3 IoCs
Processes:
Windows.Encryptor.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Control Panel\International Windows.Encryptor.exe Key created \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Control Panel\Desktop Windows.Encryptor.exe Set value (str) \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Control Panel\Desktop\WallpaperStyle = "10" Windows.Encryptor.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
Windows.Encryptor.exepid process 4056 Windows.Encryptor.exe 4056 Windows.Encryptor.exe 4056 Windows.Encryptor.exe 4056 Windows.Encryptor.exe -
Suspicious use of AdjustPrivilegeToken 17 IoCs
Processes:
Windows.Encryptor.exevssvc.exedescription pid process Token: SeBackupPrivilege 4056 Windows.Encryptor.exe Token: SeDebugPrivilege 4056 Windows.Encryptor.exe Token: 36 4056 Windows.Encryptor.exe Token: SeImpersonatePrivilege 4056 Windows.Encryptor.exe Token: SeIncBasePriorityPrivilege 4056 Windows.Encryptor.exe Token: SeIncreaseQuotaPrivilege 4056 Windows.Encryptor.exe Token: 33 4056 Windows.Encryptor.exe Token: SeManageVolumePrivilege 4056 Windows.Encryptor.exe Token: SeProfSingleProcessPrivilege 4056 Windows.Encryptor.exe Token: SeRestorePrivilege 4056 Windows.Encryptor.exe Token: SeSecurityPrivilege 4056 Windows.Encryptor.exe Token: SeSystemProfilePrivilege 4056 Windows.Encryptor.exe Token: SeTakeOwnershipPrivilege 4056 Windows.Encryptor.exe Token: SeShutdownPrivilege 4056 Windows.Encryptor.exe Token: SeBackupPrivilege 2432 vssvc.exe Token: SeRestorePrivilege 2432 vssvc.exe Token: SeAuditPrivilege 2432 vssvc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Windows.Encryptor.exe"C:\Users\Admin\AppData\Local\Temp\Windows.Encryptor.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