Analysis
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max time kernel
24s -
max time network
73s -
platform
windows10_x64 -
resource
win10v20210408 -
submitted
18-08-2021 15:23
Static task
static1
Behavioral task
behavioral1
Sample
520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe
Resource
win7v20210410
Behavioral task
behavioral2
Sample
520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe
Resource
win10v20210408
General
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Target
520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe
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Size
78KB
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MD5
50c4970003a84cab1bf2634631fe39d7
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SHA1
721a749cbd6afcd765e07902c17d5ab949b04e4a
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SHA256
520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57
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SHA512
fb210c92f7d1be9f9361b11dffd30fac78eeaadabf844a78a7dad00169f994d089c1cf4a037d6a1b82fddf35a6bfa34b8cbf216ce1786f407dfc015c72533504
Malware Config
Extracted
\??\Z:\UCzUExPUL.README.txt
blackmatter
http://supp24yy6a66hwszu2piygicgwzdtbwftb76htfj7vnip3getgqnzxid.onion/0JOA98TDMXLHJ77VDOO
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 14 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File opened for modification C:\Users\Admin\Pictures\ExpandComplete.png.UCzUExPUL 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe File opened for modification C:\Users\Admin\Pictures\InitializeResolve.raw.UCzUExPUL 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe File opened for modification C:\Users\Admin\Pictures\WriteSave.crw.UCzUExPUL 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe File renamed C:\Users\Admin\Pictures\InitializeResolve.raw => C:\Users\Admin\Pictures\InitializeResolve.raw.UCzUExPUL 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe File renamed C:\Users\Admin\Pictures\PopConvert.raw => C:\Users\Admin\Pictures\PopConvert.raw.UCzUExPUL 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe File opened for modification C:\Users\Admin\Pictures\ResumeWrite.crw.UCzUExPUL 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe File renamed C:\Users\Admin\Pictures\DebugMeasure.png => C:\Users\Admin\Pictures\DebugMeasure.png.UCzUExPUL 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe File renamed C:\Users\Admin\Pictures\OutLimit.tif => C:\Users\Admin\Pictures\OutLimit.tif.UCzUExPUL 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe File opened for modification C:\Users\Admin\Pictures\PopConvert.raw.UCzUExPUL 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe File renamed C:\Users\Admin\Pictures\ResumeWrite.crw => C:\Users\Admin\Pictures\ResumeWrite.crw.UCzUExPUL 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe File opened for modification C:\Users\Admin\Pictures\DebugMeasure.png.UCzUExPUL 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe File renamed C:\Users\Admin\Pictures\ExpandComplete.png => C:\Users\Admin\Pictures\ExpandComplete.png.UCzUExPUL 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe File opened for modification C:\Users\Admin\Pictures\OutLimit.tif.UCzUExPUL 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe File renamed C:\Users\Admin\Pictures\WriteSave.crw => C:\Users\Admin\Pictures\WriteSave.crw.UCzUExPUL 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.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: 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.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" 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe Set value (str) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\UCzUExPUL.bmp" 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
pid Process 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe -
Modifies Control Panel 3 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\Desktop 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe Set value (str) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\Desktop\WallpaperStyle = "10" 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe Key created \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\International 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe -
Suspicious use of AdjustPrivilegeToken 17 IoCs
description pid Process Token: SeBackupPrivilege 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe Token: SeDebugPrivilege 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe Token: 36 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe Token: SeImpersonatePrivilege 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe Token: SeIncBasePriorityPrivilege 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe Token: SeIncreaseQuotaPrivilege 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe Token: 33 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe Token: SeManageVolumePrivilege 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe Token: SeProfSingleProcessPrivilege 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe Token: SeRestorePrivilege 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe Token: SeSecurityPrivilege 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe Token: SeSystemProfilePrivilege 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe Token: SeTakeOwnershipPrivilege 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe Token: SeShutdownPrivilege 656 520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe Token: SeBackupPrivilege 3176 vssvc.exe Token: SeRestorePrivilege 3176 vssvc.exe Token: SeAuditPrivilege 3176 vssvc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.exe"C:\Users\Admin\AppData\Local\Temp\520bd9ed608c668810971dbd51184c6a29819674280b018dc4027bc38fc42e57.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:656
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3176