Analysis
- max time kernel
144s - max time network
125s - platform
windows11-21h2_x64 - resource
win11-20240412-en - resource tags
- submitted
24/04/2024, 23:27
General
- Target a192cbe0397ea6917647dc2b715551884a30b3d8f49ba326c77ed5dceaf8e3ba.exe
- Size 767KB
- Sample240424-3fh4labf2s
- SHA256 a192cbe0397ea6917647dc2b715551884a30b3d8f49ba326c77ed5dceaf8e3ba
Malware Config
Extracted
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djvu
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http://cajgtus.com/test1/get.php
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extension
.bgjs
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offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://cajgtus.com/files/1/build3.exe
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ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0863PsawqS
Signatures
- Detected Djvu ransomware 17 IoCs
- Djvu Ransomware
Ransomware which is a variant of the STOP family.
- Modifies file permissions 1 TTPs 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of WriteProcessMemory 26 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\a192cbe0397ea6917647dc2b715551884a30b3d8f49ba326c77ed5dceaf8e3ba.exe"C:\Users\Admin\AppData\Local\Temp\a192cbe0397ea6917647dc2b715551884a30b3d8f49ba326c77ed5dceaf8e3ba.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\a192cbe0397ea6917647dc2b715551884a30b3d8f49ba326c77ed5dceaf8e3ba.exe"C:\Users\Admin\AppData\Local\Temp\a192cbe0397ea6917647dc2b715551884a30b3d8f49ba326c77ed5dceaf8e3ba.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\7c9f2fb7-f7d7-49f9-9b91-356ee0d9d2e1" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\a192cbe0397ea6917647dc2b715551884a30b3d8f49ba326c77ed5dceaf8e3ba.exe"C:\Users\Admin\AppData\Local\Temp\a192cbe0397ea6917647dc2b715551884a30b3d8f49ba326c77ed5dceaf8e3ba.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\a192cbe0397ea6917647dc2b715551884a30b3d8f49ba326c77ed5dceaf8e3ba.exe"C:\Users\Admin\AppData\Local\Temp\a192cbe0397ea6917647dc2b715551884a30b3d8f49ba326c77ed5dceaf8e3ba.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
a192cbe0397ea6917647dc2b715551884a30b3d8f49ba326c77ed5dceaf8e3ba.exe
memory/912-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/912-2-0x0000000000400000-0x0000000000537000-memory.dmp
memory/912-20-0x0000000000400000-0x0000000000537000-memory.dmp
memory/912-6-0x0000000000400000-0x0000000000537000-memory.dmp
memory/912-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3016-22-0x0000000004290000-0x000000000432B000-memory.dmp
memory/3940-24-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3940-26-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3940-25-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3940-33-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3940-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3940-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3940-38-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3940-40-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3940-41-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3940-42-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3940-43-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4144-1-0x0000000004420000-0x00000000044B3000-memory.dmp
memory/4144-3-0x0000000005E60000-0x0000000005F7B000-memory.dmp