Resubmissions
08-07-2022 13:22
220708-ql7ypacgfn 1029-11-2021 17:04
211129-vlj9vafeb7 1005-10-2021 12:34
211005-prwl6shgb4 10Analysis
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max time kernel
146s -
max time network
142s -
platform
windows7_x64 -
resource
win7-en-20210920 -
submitted
05-10-2021 12:34
Static task
static1
Behavioral task
behavioral1
Sample
668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe
Resource
win7-en-20210920
Behavioral task
behavioral2
Sample
668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe
Resource
win10-en-20210920
General
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Target
668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe
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Size
34KB
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MD5
6f5c77478795ff7fb9700ed50b334429
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SHA1
6803d62254edf3bdd3bc523422ff98e6120b6e5b
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SHA256
668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6
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SHA512
40e4ffd227443003e0506f8d1fbfbacde54f9bfb5fa6908f05e134ee25217d3c3907d7c981107d642c071063b57253b4727fb6a211d7698a7a9bae2d8beede5f
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 15 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File opened for modification C:\Users\Admin\Pictures\ShowGroup.tiff 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe File renamed C:\Users\Admin\Pictures\SplitClose.tif => C:\Users\Admin\Pictures\SplitClose.tif.chkvc3MvG 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe File renamed C:\Users\Admin\Pictures\UnprotectReceive.tiff => C:\Users\Admin\Pictures\UnprotectReceive.tiff.chkvc3MvG 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe File opened for modification C:\Users\Admin\Pictures\PingDismount.raw.chkvc3MvG 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe File opened for modification C:\Users\Admin\Pictures\ShowGroup.tiff.chkvc3MvG 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe File opened for modification C:\Users\Admin\Pictures\UnprotectReceive.tiff 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe File opened for modification C:\Users\Admin\Pictures\UnprotectReceive.tiff.chkvc3MvG 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe File renamed C:\Users\Admin\Pictures\EditRevoke.tiff => C:\Users\Admin\Pictures\EditRevoke.tiff.chkvc3MvG 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe File renamed C:\Users\Admin\Pictures\PingDismount.raw => C:\Users\Admin\Pictures\PingDismount.raw.chkvc3MvG 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe File renamed C:\Users\Admin\Pictures\ShowGroup.tiff => C:\Users\Admin\Pictures\ShowGroup.tiff.chkvc3MvG 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe File opened for modification C:\Users\Admin\Pictures\SplitClose.tif.chkvc3MvG 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe File opened for modification C:\Users\Admin\Pictures\EditRevoke.tiff 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe File opened for modification C:\Users\Admin\Pictures\EditRevoke.tiff.chkvc3MvG 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe File renamed C:\Users\Admin\Pictures\UnprotectMount.tif => C:\Users\Admin\Pictures\UnprotectMount.tif.chkvc3MvG 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe File opened for modification C:\Users\Admin\Pictures\UnprotectMount.tif.chkvc3MvG 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.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" 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe Set value (str) \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\chkvc3MvG.bmp" 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
pid Process 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe -
Modifies Control Panel 3 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Control Panel\Desktop 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe Set value (str) \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Control Panel\Desktop\WallpaperStyle = "10" 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe Key created \REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Control Panel\International 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe -
Suspicious use of AdjustPrivilegeToken 17 IoCs
description pid Process Token: SeBackupPrivilege 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe Token: SeDebugPrivilege 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe Token: 36 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe Token: SeImpersonatePrivilege 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe Token: SeIncBasePriorityPrivilege 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe Token: SeIncreaseQuotaPrivilege 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe Token: 33 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe Token: SeManageVolumePrivilege 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe Token: SeProfSingleProcessPrivilege 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe Token: SeRestorePrivilege 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe Token: SeSecurityPrivilege 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe Token: SeSystemProfilePrivilege 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe Token: SeTakeOwnershipPrivilege 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe Token: SeShutdownPrivilege 1324 668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe Token: SeBackupPrivilege 1552 vssvc.exe Token: SeRestorePrivilege 1552 vssvc.exe Token: SeAuditPrivilege 1552 vssvc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.exe"C:\Users\Admin\AppData\Local\Temp\668a4a2300f36c9df0f7307cc614be3297f036fa312a424765cdb2c169187fe6.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:1324
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1552