Analysis
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max time kernel
22s -
max time network
116s -
platform
windows10_x64 -
resource
win10v20210408 -
submitted
30-08-2021 01:38
Static task
static1
Behavioral task
behavioral1
Sample
20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe
Resource
win7v20210408
Behavioral task
behavioral2
Sample
20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe
Resource
win10v20210408
General
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Target
20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe
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Size
78KB
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MD5
7b125a148ce0e0c126b95395dbf02b0e
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SHA1
778f954480ca76029109fd6bf34904bfb1109e84
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SHA256
20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41
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SHA512
daaeb7e228a3d5c7717c58287539902e79215d9795dcb1459213f7d515392f53f16ac2f0d455e635e89addd321f4f68ccdad9f5af60f8f4d1759b7ddf5409cf9
Malware Config
Extracted
C:\UCzUExPUL.README.txt
blackmatter
http://supp24maprinktc7uizgfyqhisx7lkszb6ogh6lwdzpac23w3mh4tvyd.onion/LEOYRMQLSRHFGFGYWF2T5
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 15 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File opened for modification C:\Users\Admin\Pictures\ExitDebug.crw.UCzUExPUL 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe File renamed C:\Users\Admin\Pictures\MergeCompare.tiff => C:\Users\Admin\Pictures\MergeCompare.tiff.UCzUExPUL 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe File renamed C:\Users\Admin\Pictures\RemoveRegister.raw => C:\Users\Admin\Pictures\RemoveRegister.raw.UCzUExPUL 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe File opened for modification C:\Users\Admin\Pictures\RemoveRegister.raw.UCzUExPUL 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe File opened for modification C:\Users\Admin\Pictures\ConvertToSend.crw.UCzUExPUL 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe File opened for modification C:\Users\Admin\Pictures\DenyReset.tif.UCzUExPUL 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe File opened for modification C:\Users\Admin\Pictures\DismountSplit.raw.UCzUExPUL 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe File renamed C:\Users\Admin\Pictures\ExitDebug.crw => C:\Users\Admin\Pictures\ExitDebug.crw.UCzUExPUL 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe File renamed C:\Users\Admin\Pictures\DismountSplit.raw => C:\Users\Admin\Pictures\DismountSplit.raw.UCzUExPUL 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe File opened for modification C:\Users\Admin\Pictures\MergeCompare.tiff 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe File renamed C:\Users\Admin\Pictures\ConvertToSend.crw => C:\Users\Admin\Pictures\ConvertToSend.crw.UCzUExPUL 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe File renamed C:\Users\Admin\Pictures\DenyReset.tif => C:\Users\Admin\Pictures\DenyReset.tif.UCzUExPUL 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe File renamed C:\Users\Admin\Pictures\MountDismount.tif => C:\Users\Admin\Pictures\MountDismount.tif.UCzUExPUL 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe File opened for modification C:\Users\Admin\Pictures\MountDismount.tif.UCzUExPUL 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe File opened for modification C:\Users\Admin\Pictures\MergeCompare.tiff.UCzUExPUL 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe -
Enumerates connected drives 3 TTPs 1 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\Z: 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe -
Sets desktop wallpaper using registry 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\UCzUExPUL.bmp" 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe Set value (str) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\UCzUExPUL.bmp" 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
pid Process 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe -
Modifies Control Panel 3 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\International 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe Key created \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\Desktop 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe Set value (str) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\Desktop\WallpaperStyle = "10" 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe -
Suspicious use of AdjustPrivilegeToken 17 IoCs
description pid Process Token: SeBackupPrivilege 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe Token: SeDebugPrivilege 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe Token: 36 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe Token: SeImpersonatePrivilege 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe Token: SeIncBasePriorityPrivilege 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe Token: SeIncreaseQuotaPrivilege 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe Token: 33 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe Token: SeManageVolumePrivilege 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe Token: SeProfSingleProcessPrivilege 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe Token: SeRestorePrivilege 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe Token: SeSecurityPrivilege 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe Token: SeSystemProfilePrivilege 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe Token: SeTakeOwnershipPrivilege 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe Token: SeShutdownPrivilege 1096 20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe Token: SeBackupPrivilege 3824 vssvc.exe Token: SeRestorePrivilege 3824 vssvc.exe Token: SeAuditPrivilege 3824 vssvc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.exe"C:\Users\Admin\AppData\Local\Temp\20742987e6f743814b25e214f8b2cd43111e2f60a8856a6cca87cafd85422f41.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
PID:1096
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3824