Analysis
- max time kernel
149s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20251223-en - resource tags
- submitted
18/12/2025, 21:50
General
- Target JaffaCakes118_39c0e005cd2892a7b315081f9db6dc37.exe
- Size 742KB
- Sample251218-1p8phasqby
- SHA256 9005436ea8f7c0dede260d1b249540c94a02431afe4d26956b4199705577ea62
Malware Config
Extracted
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C:\ProgramData\fbbkpkn.html
- Your documents, photos, databases and other important files have been encrypted with strongest encryption and unique key, generated for this computer. Private decryption key is stored on a secret Internet server and nobody can decrypt your files until you pay and obtain the private key. If you see the main locker window, follow the instructions on the locker. Overwise, it's seems that you or your antivirus deleted the locker program. Now you have the last chance to decrypt your files. Open http://fizxfsi3cad3kn7v.onion.cab or http://fizxfsi3cad3kn7v.tor2web.org in your browser. They are public gates to the secret server. If you have problems with gates, use direct connection: 1. Download Tor Browser from http://torproject.org. 2. In the Tor Browser open the http://fizxfsi3cad3kn7v.onion Note that this server is available via Tor Browser only. Retry in 1 hour if site is not reachable. Copy and paste the following public key in the input form on server. Avoid missprints. Follow the instructions on the server. The list of your encrypted files: Path File
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http://fizxfsi3cad3kn7v.onion.cab
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http://fizxfsi3cad3kn7v.tor2web.org
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http://fizxfsi3cad3kn7v.onion
Signatures
- CTB-Locker
Ransomware family which uses Tor to hide its C2 communications.
- Ctblocker family
- Executes dropped EXE 2 IoCs
- Drops desktop.ini file(s) 2 IoCs
- Enumerates connected drives 3 TTPs 1 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
- Drops file in System32 directory 5 IoCs
- Sets desktop wallpaper using registry 2 TTPs 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 3 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Modifies Internet Explorer settings 1 TTPs 4 IoCs
- Modifies data under HKEY_USERS 23 IoCs
- Suspicious behavior: EnumeratesProcesses 14 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 52 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SendNotifyMessage 1 IoCs
- Suspicious use of SetWindowsHookEx 2 IoCs
- Suspicious use of UnmapMainImage 1 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
Processes
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k DcomLaunch -p1⤵
- Drops desktop.ini file(s)
- Enumerates connected drives
- Modifies data under HKEY_USERS
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\DllHost.exeC:\Windows\system32\DllHost.exe /Processid:{AB8902B4-09CA-4BB6-B78D-A8F59079A8D5}2⤵
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Sets desktop wallpaper using registry
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
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C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_39c0e005cd2892a7b315081f9db6dc37.exe"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_39c0e005cd2892a7b315081f9db6dc37.exe"2⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
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C:\Users\Admin\AppData\Local\Temp\ehjowml.exeC:\Users\Admin\AppData\Local\Temp\ehjowml.exe1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\ehjowml.exe"C:\Users\Admin\AppData\Local\Temp\ehjowml.exe" -u2⤵
- Executes dropped EXE
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4828 -ip 48281⤵
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
fbbkpkn.html
homengn
homengn
homengn
homengn
ehjowml.exe
CachedImage_1280_720_POS0.jpg
CachedImage_1280_720_POS4.JPG.yjilmrn
memory/808-13-0x00000000345C0000-0x0000000034637000-memory.dmp
memory/808-3325-0x00000000345C0000-0x0000000034637000-memory.dmp
memory/808-21-0x00000000345C0000-0x0000000034637000-memory.dmp
memory/808-23-0x00000000345C0000-0x0000000034637000-memory.dmp
memory/808-19-0x00000000345C0000-0x0000000034637000-memory.dmp
memory/808-16-0x00000000345C0000-0x0000000034637000-memory.dmp
memory/808-222-0x00000000345C0000-0x0000000034637000-memory.dmp
memory/808-15-0x00000000345C0000-0x0000000034637000-memory.dmp
memory/3520-3407-0x00000000028E0000-0x0000000002B2B000-memory.dmp
memory/3520-3406-0x00000000028E0000-0x0000000002B2B000-memory.dmp
memory/3520-3403-0x00000000028E0000-0x0000000002B2B000-memory.dmp
memory/3520-3404-0x00000000028E0000-0x0000000002B2B000-memory.dmp
memory/3520-3358-0x00000000028E0000-0x0000000002B2B000-memory.dmp
memory/3520-3359-0x00000000028E0000-0x0000000002B2B000-memory.dmp
memory/3792-3-0x0000000002790000-0x00000000029AA000-memory.dmp
memory/3792-2-0x0000000000400000-0x00000000004BC000-memory.dmp
memory/3792-4-0x00000000029B0000-0x0000000002BFB000-memory.dmp
memory/3792-1-0x0000000000B90000-0x0000000000B91000-memory.dmp
memory/3792-0-0x0000000000770000-0x0000000000771000-memory.dmp
memory/3792-223-0x0000000000400000-0x00000000004BC000-memory.dmp
memory/4828-3337-0x0000000001520000-0x000000000176B000-memory.dmp
memory/4828-10-0x0000000001520000-0x000000000176B000-memory.dmp