Analysis
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max time kernel
148s -
max time network
130s -
platform
windows11-21h2_x64 -
resource
win11-20240426-en -
resource tags
arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system -
submitted
24-05-2024 19:21
Static task
static1
Behavioral task
behavioral1
Sample
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
Resource
win11-20240426-en
General
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Target
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
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Size
716KB
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MD5
2a02c81a9994f011090e174bb076ec9b
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SHA1
50cf1a96d5e2945143b6fb3484b124d41349c77c
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SHA256
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18
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SHA512
d6d44ee8d3cb1a39228e24f669e86ee871f0bef7b3348924b63e4b067b0ccf0f9f00333fa55d7f46b18dcd13fb4144e83e2611d118557639aa837861eb51342a
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SSDEEP
12288:0k0wJoEANTCwX67nsbdxnZF2+9R32y1Cbd8n34rtzjg1S0lWEKm:0kVCGwX6LsbS+9Uy1CxCwtQkeKm
Malware Config
Extracted
djvu
http://cajgtus.com/test1/get.php
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extension
.vepi
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offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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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/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 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: 0871PsawqS
Signatures
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Detected Djvu ransomware 15 IoCs
Processes:
resource yara_rule behavioral2/memory/424-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1776-4-0x0000000004AD0000-0x0000000004BEB000-memory.dmp family_djvu behavioral2/memory/424-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/424-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/424-2-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/424-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2884-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2884-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2884-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2884-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2884-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2884-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2884-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2884-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2884-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2551177587-3778486488-1329702901-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\bd25abf0-373b-446d-b87f-1a1bf18218be\\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe\" --AutoStart" c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe -
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 1 api.2ip.ua 3 api.2ip.ua 6 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exec4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exedescription pid process target process PID 1776 set thread context of 424 1776 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2232 set thread context of 2884 2232 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exec4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exepid process 424 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe 424 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe 2884 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe 2884 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exec4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exec4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exedescription pid process target process PID 1776 wrote to memory of 424 1776 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1776 wrote to memory of 424 1776 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1776 wrote to memory of 424 1776 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1776 wrote to memory of 424 1776 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1776 wrote to memory of 424 1776 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1776 wrote to memory of 424 1776 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1776 wrote to memory of 424 1776 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1776 wrote to memory of 424 1776 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1776 wrote to memory of 424 1776 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1776 wrote to memory of 424 1776 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 424 wrote to memory of 2920 424 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe icacls.exe PID 424 wrote to memory of 2920 424 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe icacls.exe PID 424 wrote to memory of 2920 424 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe icacls.exe PID 424 wrote to memory of 2232 424 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 424 wrote to memory of 2232 424 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 424 wrote to memory of 2232 424 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2232 wrote to memory of 2884 2232 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2232 wrote to memory of 2884 2232 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2232 wrote to memory of 2884 2232 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2232 wrote to memory of 2884 2232 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2232 wrote to memory of 2884 2232 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2232 wrote to memory of 2884 2232 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2232 wrote to memory of 2884 2232 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2232 wrote to memory of 2884 2232 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2232 wrote to memory of 2884 2232 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2232 wrote to memory of 2884 2232 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.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\bd25abf0-373b-446d-b87f-1a1bf18218be" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EAFilesize
1KB
MD57bb5a14437331aad24915a3d8546fbc1
SHA19a5570c07af0c0cde02858f61e1c7094f5a70f38
SHA25642397d9f3c8164d4cef19fc169d7bcea77a3ea7e9bcb8cfa7db2ff0bbd3a7e00
SHA512a2333a078be981eafe3f666ff3944cd3b28279a9da99f354014d81d80e98a0effabff2a8f5ab5fba61f7de9e49e2af3112dda6b28678192a1d80d2ca22004f13
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
724B
MD58202a1cd02e7d69597995cabbe881a12
SHA18858d9d934b7aa9330ee73de6c476acf19929ff6
SHA25658f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA51297ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EAFilesize
410B
MD5735bfc17cc52d5666757cec7c536b652
SHA139eecd9b1ebc5976af45930fadb4d2d798a7aae2
SHA256d7c1a3efabbbf2eaed2bbc0272a6459f7192becb0f55a4e33f684ce3240a3b6b
SHA512796f7261a1922826e3ced13d4f4380f1f338b383d7f5d1331139abbaae14aa880d88df7f52b2aba275a240f44a980b918c0977b25fb1ed2fd21779e7df07cf84
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
392B
MD5e8b466468524bbc1c2d26b6817ac5ad7
SHA18bdfae9101e2fab93ba84dab95d726a327ec1f0c
SHA256d9cf9dd976bc3af78ae0d1a10d6d98e8ce183d9d1d6e1b24e11c4b8e068dd7f5
SHA51235bf90eb1887e70e7eb1ae55c1aa1bdd4b7a6a55aeb6228700fb2d50b76952265a869797f792ce8a40876ad074283c1c27a81bb015a8d8f25fd05932526f4689
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C:\Users\Admin\AppData\Local\bd25abf0-373b-446d-b87f-1a1bf18218be\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exeFilesize
716KB
MD52a02c81a9994f011090e174bb076ec9b
SHA150cf1a96d5e2945143b6fb3484b124d41349c77c
SHA256c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18
SHA512d6d44ee8d3cb1a39228e24f669e86ee871f0bef7b3348924b63e4b067b0ccf0f9f00333fa55d7f46b18dcd13fb4144e83e2611d118557639aa837861eb51342a
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memory/424-2-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/424-3-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/424-19-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/424-5-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/424-6-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/1776-4-0x0000000004AD0000-0x0000000004BEB000-memory.dmpFilesize
1.1MB
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memory/1776-1-0x0000000004A30000-0x0000000004ACE000-memory.dmpFilesize
632KB
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memory/2884-22-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2884-27-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2884-28-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2884-29-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2884-34-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2884-35-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2884-32-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2884-36-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2884-37-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB