Analysis
-
max time kernel
143s -
max time network
152s -
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 10:12
Behavioral task
behavioral1
Sample
2c323453e9.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2c323453e9.exe
Resource
win10v2004-20240226-en
General
-
Target
2c323453e9.exe
-
Size
66KB
-
MD5
a55bc3368a10ca5a92c1c9ecae97ced9
-
SHA1
72ed32b0e8692c7caa25d61e1828cdb48c4fe361
-
SHA256
2c323453e959257c7aa86dc180bb3aaaa5c5ec06fa4e72b632d9e4b817052009
-
SHA512
da3187046c267b8053f0274de81665234dd07c1d06c61108878abccccb2f10bfe4bf7c53e0e4100ed76772b8b92bdd6c4953f19250f33be7dd9380ab3b63db3c
-
SSDEEP
1536:HzICS4AT6GxdEe+TOdincJXvKvWLBjklE:4R7auJXSOhCE
Malware Config
Extracted
C:\MaiYWlrYr.README.txt
blackmatter
http://supp24yy6a66hwszu2piygicgwzdtbwftb76htfj7vnip3getgqnzxid.onion/GDBJS76DH3D4IKQD2QO7R
Signatures
-
BlackMatter Ransomware
BlackMatter ransomware group claims to be Darkside and REvil succesor.
-
Renames multiple (149) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
-
Sets desktop wallpaper using registry 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\MaiYWlrYr.bmp" 2c323453e9.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\MaiYWlrYr.bmp" 2c323453e9.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
pid Process 1712 2c323453e9.exe 1712 2c323453e9.exe 1712 2c323453e9.exe 1712 2c323453e9.exe 1712 2c323453e9.exe 1712 2c323453e9.exe -
Modifies Control Panel 3 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\Desktop\WallpaperStyle = "10" 2c323453e9.exe Key created \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International 2c323453e9.exe Key created \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\Desktop 2c323453e9.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1712 2c323453e9.exe 1712 2c323453e9.exe 1712 2c323453e9.exe 1712 2c323453e9.exe -
Suspicious use of AdjustPrivilegeToken 17 IoCs
description pid Process Token: SeBackupPrivilege 1712 2c323453e9.exe Token: SeDebugPrivilege 1712 2c323453e9.exe Token: 36 1712 2c323453e9.exe Token: SeImpersonatePrivilege 1712 2c323453e9.exe Token: SeIncBasePriorityPrivilege 1712 2c323453e9.exe Token: SeIncreaseQuotaPrivilege 1712 2c323453e9.exe Token: 33 1712 2c323453e9.exe Token: SeManageVolumePrivilege 1712 2c323453e9.exe Token: SeProfSingleProcessPrivilege 1712 2c323453e9.exe Token: SeRestorePrivilege 1712 2c323453e9.exe Token: SeSecurityPrivilege 1712 2c323453e9.exe Token: SeSystemProfilePrivilege 1712 2c323453e9.exe Token: SeTakeOwnershipPrivilege 1712 2c323453e9.exe Token: SeShutdownPrivilege 1712 2c323453e9.exe Token: SeBackupPrivilege 936 vssvc.exe Token: SeRestorePrivilege 936 vssvc.exe Token: SeAuditPrivilege 936 vssvc.exe -
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
-
C:\Users\Admin\AppData\Local\Temp\2c323453e9.exe"C:\Users\Admin\AppData\Local\Temp\2c323453e9.exe"1⤵
- Sets desktop wallpaper using registry
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Modifies Control Panel
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1712
-
C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:936
-
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3804 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:81⤵PID:2976
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
1KB
MD58a485e9f1237d69236522d2409a7fc3c
SHA1fab1b7c56399623ae49ba840d0a88deb20099b5d
SHA256d9006d5c753c364b27388831f03332f404b719a66f344ce8b1a340da24e93d53
SHA512d0f2416496c77ad305de712ac8b6b42d9b57337eec88e66dddd8fc59309acda7a08ab3a492b961a850e8e501eafc0b23f6371af78210b86beefaae980e014483