Analysis
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max time kernel
361s -
max time network
368s -
platform
windows7_x64 -
resource
win7-en-20210920 -
submitted
20-10-2021 18:46
Static task
static1
Behavioral task
behavioral1
Sample
603f72809a4fccd98a5b822064bacc67.blackmatter.exe
Resource
win7-en-20210920
Behavioral task
behavioral2
Sample
603f72809a4fccd98a5b822064bacc67.blackmatter.exe
Resource
win10-en-20211014
General
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Target
603f72809a4fccd98a5b822064bacc67.blackmatter.exe
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Size
84KB
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MD5
603f72809a4fccd98a5b822064bacc67
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SHA1
fd6df5c96a57204f3e26e9334b6c0438bc78fbba
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SHA256
f32604fba766c946b429cf7e152273794ebba9935999986b7e137ca46cd165fc
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SHA512
e0de13b1e8f9d78b4424ef5ce4c3d193ff84b9507a6a35b6691cea7dc9b1ea38be66e345ed36eccc5956a14d24d57e45eb7e6994efb0aa8e7de93010673a7080
Malware Config
Extracted
C:\chkvc3MvG.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 8 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File renamed C:\Users\Admin\Pictures\FormatProtect.tif => C:\Users\Admin\Pictures\FormatProtect.tif.chkvc3MvG 603f72809a4fccd98a5b822064bacc67.blackmatter.exe File opened for modification C:\Users\Admin\Pictures\FormatProtect.tif.chkvc3MvG 603f72809a4fccd98a5b822064bacc67.blackmatter.exe File renamed C:\Users\Admin\Pictures\FormatSplit.crw => C:\Users\Admin\Pictures\FormatSplit.crw.chkvc3MvG 603f72809a4fccd98a5b822064bacc67.blackmatter.exe File opened for modification C:\Users\Admin\Pictures\FormatSplit.crw.chkvc3MvG 603f72809a4fccd98a5b822064bacc67.blackmatter.exe File renamed C:\Users\Admin\Pictures\SwitchConvert.raw => C:\Users\Admin\Pictures\SwitchConvert.raw.chkvc3MvG 603f72809a4fccd98a5b822064bacc67.blackmatter.exe File opened for modification C:\Users\Admin\Pictures\SwitchConvert.raw.chkvc3MvG 603f72809a4fccd98a5b822064bacc67.blackmatter.exe File renamed C:\Users\Admin\Pictures\UnpublishReset.raw => C:\Users\Admin\Pictures\UnpublishReset.raw.chkvc3MvG 603f72809a4fccd98a5b822064bacc67.blackmatter.exe File opened for modification C:\Users\Admin\Pictures\UnpublishReset.raw.chkvc3MvG 603f72809a4fccd98a5b822064bacc67.blackmatter.exe -
Sets desktop wallpaper using registry 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\chkvc3MvG.bmp" 603f72809a4fccd98a5b822064bacc67.blackmatter.exe Set value (str) \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\chkvc3MvG.bmp" 603f72809a4fccd98a5b822064bacc67.blackmatter.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
pid Process 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe -
Modifies Control Panel 3 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Control Panel\Desktop\WallpaperStyle = "10" 603f72809a4fccd98a5b822064bacc67.blackmatter.exe Key created \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Control Panel\International 603f72809a4fccd98a5b822064bacc67.blackmatter.exe Key created \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Control Panel\Desktop 603f72809a4fccd98a5b822064bacc67.blackmatter.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe -
Suspicious use of AdjustPrivilegeToken 17 IoCs
description pid Process Token: SeBackupPrivilege 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe Token: SeDebugPrivilege 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe Token: 36 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe Token: SeImpersonatePrivilege 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe Token: SeIncBasePriorityPrivilege 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe Token: SeIncreaseQuotaPrivilege 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe Token: 33 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe Token: SeManageVolumePrivilege 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe Token: SeProfSingleProcessPrivilege 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe Token: SeRestorePrivilege 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe Token: SeSecurityPrivilege 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe Token: SeSystemProfilePrivilege 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe Token: SeTakeOwnershipPrivilege 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe Token: SeShutdownPrivilege 1364 603f72809a4fccd98a5b822064bacc67.blackmatter.exe Token: SeBackupPrivilege 816 vssvc.exe Token: SeRestorePrivilege 816 vssvc.exe Token: SeAuditPrivilege 816 vssvc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\603f72809a4fccd98a5b822064bacc67.blackmatter.exe"C:\Users\Admin\AppData\Local\Temp\603f72809a4fccd98a5b822064bacc67.blackmatter.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:1364
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:816