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Resubmissions
08/03/2024, 01:50
240308-b9hw5sda7w 10Analysis
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max time kernel
145s -
max time network
174s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
08/03/2024, 01:50
Behavioral task
behavioral1
Sample
ba375d0625001102fc1f2ccb6f582d91.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
ba375d0625001102fc1f2ccb6f582d91.exe
Resource
win10v2004-20240226-en
General
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Target
ba375d0625001102fc1f2ccb6f582d91.exe
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Size
66KB
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MD5
ba375d0625001102fc1f2ccb6f582d91
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SHA1
379ebd1eff6f8685f4ff72657626bf6df5383d87
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SHA256
c6e2ef30a86baa670590bd21acf5b91822117e0cbe6060060bc5fe0182dace99
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SHA512
795b10a638e289729192de6a6d9964b5ad3b8084f84d58da077ca8ec08c8b8cb1acadb5240962d4ccacf66242bab1430923fc77bdbbfacd0badd64df2ba1487f
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SSDEEP
1536:HzICS4AT6GxdEe+TOdincJXvKvWLBjkl:4R7auJXSOhC
Malware Config
Extracted
C:\k7lIe3tIu.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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Renames multiple (151) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Sets desktop wallpaper using registry 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\k7lIe3tIu.bmp" ba375d0625001102fc1f2ccb6f582d91.exe Set value (str) \REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\k7lIe3tIu.bmp" ba375d0625001102fc1f2ccb6f582d91.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
pid Process 488 ba375d0625001102fc1f2ccb6f582d91.exe 488 ba375d0625001102fc1f2ccb6f582d91.exe 488 ba375d0625001102fc1f2ccb6f582d91.exe 488 ba375d0625001102fc1f2ccb6f582d91.exe 488 ba375d0625001102fc1f2ccb6f582d91.exe 488 ba375d0625001102fc1f2ccb6f582d91.exe -
Modifies Control Panel 3 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International ba375d0625001102fc1f2ccb6f582d91.exe Key created \REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\Desktop ba375d0625001102fc1f2ccb6f582d91.exe Set value (str) \REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\Desktop\WallpaperStyle = "10" ba375d0625001102fc1f2ccb6f582d91.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 488 ba375d0625001102fc1f2ccb6f582d91.exe 488 ba375d0625001102fc1f2ccb6f582d91.exe 488 ba375d0625001102fc1f2ccb6f582d91.exe 488 ba375d0625001102fc1f2ccb6f582d91.exe -
Suspicious use of AdjustPrivilegeToken 17 IoCs
description pid Process Token: SeBackupPrivilege 488 ba375d0625001102fc1f2ccb6f582d91.exe Token: SeDebugPrivilege 488 ba375d0625001102fc1f2ccb6f582d91.exe Token: 36 488 ba375d0625001102fc1f2ccb6f582d91.exe Token: SeImpersonatePrivilege 488 ba375d0625001102fc1f2ccb6f582d91.exe Token: SeIncBasePriorityPrivilege 488 ba375d0625001102fc1f2ccb6f582d91.exe Token: SeIncreaseQuotaPrivilege 488 ba375d0625001102fc1f2ccb6f582d91.exe Token: 33 488 ba375d0625001102fc1f2ccb6f582d91.exe Token: SeManageVolumePrivilege 488 ba375d0625001102fc1f2ccb6f582d91.exe Token: SeProfSingleProcessPrivilege 488 ba375d0625001102fc1f2ccb6f582d91.exe Token: SeRestorePrivilege 488 ba375d0625001102fc1f2ccb6f582d91.exe Token: SeSecurityPrivilege 488 ba375d0625001102fc1f2ccb6f582d91.exe Token: SeSystemProfilePrivilege 488 ba375d0625001102fc1f2ccb6f582d91.exe Token: SeTakeOwnershipPrivilege 488 ba375d0625001102fc1f2ccb6f582d91.exe Token: SeShutdownPrivilege 488 ba375d0625001102fc1f2ccb6f582d91.exe Token: SeBackupPrivilege 3092 vssvc.exe Token: SeRestorePrivilege 3092 vssvc.exe Token: SeAuditPrivilege 3092 vssvc.exe -
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\ba375d0625001102fc1f2ccb6f582d91.exe"C:\Users\Admin\AppData\Local\Temp\ba375d0625001102fc1f2ccb6f582d91.exe"1⤵
- Sets desktop wallpaper using registry
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Modifies Control Panel
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:488
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3092
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1KB
MD58a485e9f1237d69236522d2409a7fc3c
SHA1fab1b7c56399623ae49ba840d0a88deb20099b5d
SHA256d9006d5c753c364b27388831f03332f404b719a66f344ce8b1a340da24e93d53
SHA512d0f2416496c77ad305de712ac8b6b42d9b57337eec88e66dddd8fc59309acda7a08ab3a492b961a850e8e501eafc0b23f6371af78210b86beefaae980e014483