Analysis
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max time kernel
122s -
max time network
122s -
platform
windows10_x64 -
resource
win10-en-20211014 -
submitted
15-10-2021 15:10
Static task
static1
Behavioral task
behavioral1
Sample
BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe
Resource
win7-en-20210920
Behavioral task
behavioral2
Sample
BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe
Resource
win10-en-20211014
General
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Target
BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe
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Size
79KB
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MD5
f1c260c31b9d3f9ff54a142d508ec602
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SHA1
6b25c80e8b2dca94ea6b6a95745a496ec0bcabd3
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SHA256
2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c
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SHA512
9412a185d008ded02e2061cd4e998222071923f6260ecdcc9a3f1969ea2aa89a9493866e13450d82b8ab390ec78b24d7ba82a6e2618d11cf27d67f43a7d39d6a
Malware Config
Extracted
C:\WRLMMTHME.README.txt
blackmatter
https://prnt.sc/1o6e5a2
https://prnt.sc/1o6ei7g
https://prnt.sc/1o6exr8
https://prnt.sc/1o6fbxu
https://prnt.sc/1o6fvkn
http://supp24yy6a66hwszu2piygicgwzdtbwftb76htfj7vnip3getgqnzxid.onion/EBVCVJNCPM6A3NKJ
Signatures
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BlackMatter Ransomware
BlackMatter ransomware group claims to be Darkside and REvil succesor.
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suricata: ET MALWARE BlackMatter CnC Domain in DNS Lookup (mojobiden .com)
suricata: ET MALWARE BlackMatter CnC Domain in DNS Lookup (mojobiden .com)
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Modifies extensions of user files 12 IoCs
Ransomware generally changes the extension on encrypted files.
description ioc Process File renamed C:\Users\Admin\Pictures\BlockConvert.raw => C:\Users\Admin\Pictures\BlockConvert.raw.WRLMMTHME BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe File opened for modification C:\Users\Admin\Pictures\BlockConvert.raw.WRLMMTHME BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe File opened for modification C:\Users\Admin\Pictures\UndoRemove.tiff BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe File renamed C:\Users\Admin\Pictures\UndoRemove.tiff => C:\Users\Admin\Pictures\UndoRemove.tiff.WRLMMTHME BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe File opened for modification C:\Users\Admin\Pictures\UnpublishInstall.tiff BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe File renamed C:\Users\Admin\Pictures\UnpublishInstall.tiff => C:\Users\Admin\Pictures\UnpublishInstall.tiff.WRLMMTHME BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe File opened for modification C:\Users\Admin\Pictures\UnpublishInstall.tiff.WRLMMTHME BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe File renamed C:\Users\Admin\Pictures\FormatHide.crw => C:\Users\Admin\Pictures\FormatHide.crw.WRLMMTHME BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe File opened for modification C:\Users\Admin\Pictures\FormatHide.crw.WRLMMTHME BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe File renamed C:\Users\Admin\Pictures\RestorePush.png => C:\Users\Admin\Pictures\RestorePush.png.WRLMMTHME BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe File opened for modification C:\Users\Admin\Pictures\RestorePush.png.WRLMMTHME BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe File opened for modification C:\Users\Admin\Pictures\UndoRemove.tiff.WRLMMTHME BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.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: BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe -
Sets desktop wallpaper using registry 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\WRLMMTHME.bmp" BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe Set value (str) \REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\WRLMMTHME.bmp" BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
pid Process 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe -
Modifies Control Panel 3 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000\Control Panel\International BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe Key created \REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000\Control Panel\Desktop BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe Set value (str) \REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000\Control Panel\Desktop\WallpaperStyle = "10" BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe -
Suspicious use of AdjustPrivilegeToken 17 IoCs
description pid Process Token: SeBackupPrivilege 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe Token: SeDebugPrivilege 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe Token: 36 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe Token: SeImpersonatePrivilege 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe Token: SeIncBasePriorityPrivilege 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe Token: SeIncreaseQuotaPrivilege 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe Token: 33 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe Token: SeManageVolumePrivilege 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe Token: SeProfSingleProcessPrivilege 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe Token: SeRestorePrivilege 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe Token: SeSecurityPrivilege 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe Token: SeSystemProfilePrivilege 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe Token: SeTakeOwnershipPrivilege 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe Token: SeShutdownPrivilege 1744 BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe Token: SeBackupPrivilege 3984 vssvc.exe Token: SeRestorePrivilege 3984 vssvc.exe Token: SeAuditPrivilege 3984 vssvc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.exe"C:\Users\Admin\AppData\Local\Temp\BluStealer_2466fca0e29b06c78ffa8a44193fb58c30e6bec4e54bbef8e6622349b95cce4c.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:1744
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3984