Analysis
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max time kernel
147s -
max time network
96s -
platform
windows11-21h2_x64 -
resource
win11-20240419-en -
resource tags
arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system -
submitted
27-04-2024 05:15
Static task
static1
Behavioral task
behavioral1
Sample
4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
Resource
win10v2004-20240419-en
Behavioral task
behavioral2
Sample
4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
Resource
win11-20240419-en
General
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Target
4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
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Size
749KB
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MD5
cf3c3f6d06eb8dd404cc00985d48aac9
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SHA1
18983221c5bddef39d652c56aaf86ebbe0b543ee
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SHA256
4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a
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SHA512
96bab63db330605f3a1ae3394b685bf2d21e257341723d440a9277cad6b971b403a8a29ae692ca6c2f1e7e5060765111120c1bfc87132befee658da71038ecd4
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SSDEEP
12288:PNoZVbIhDoX1L9nC+DUSKEMz4exreOipN0RJaHute4UKxVMdNawFIq7fD6d/A:PSZZiy1B5DUSrdexiOS6JJGqVMayfOd
Malware Config
Extracted
djvu
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
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Detected Djvu ransomware 15 IoCs
Processes:
resource yara_rule behavioral2/memory/2916-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4816-5-0x00000000049B0000-0x0000000004ACB000-memory.dmp family_djvu behavioral2/memory/2916-2-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2916-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2916-1-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2916-12-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1996-15-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1996-16-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1996-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1996-18-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1996-25-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1996-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1996-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1996-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1996-31-0x0000000000400000-0x0000000000537000-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:
4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-293923083-2364846840-4256557006-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c7f5879b-deb1-40b3-92fd-1dad4443444c\\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe\" --AutoStart" 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe -
Looks up external IP address via web service 2 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 -
Suspicious use of SetThreadContext 2 IoCs
Processes:
4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exedescription pid process target process PID 4816 set thread context of 2916 4816 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 2864 set thread context of 1996 2864 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.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:
4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exepid process 2916 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 2916 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 1996 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 1996 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exedescription pid process target process PID 4816 wrote to memory of 2916 4816 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 4816 wrote to memory of 2916 4816 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 4816 wrote to memory of 2916 4816 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 4816 wrote to memory of 2916 4816 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 4816 wrote to memory of 2916 4816 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 4816 wrote to memory of 2916 4816 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 4816 wrote to memory of 2916 4816 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 4816 wrote to memory of 2916 4816 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 4816 wrote to memory of 2916 4816 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 4816 wrote to memory of 2916 4816 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 2916 wrote to memory of 3772 2916 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe icacls.exe PID 2916 wrote to memory of 3772 2916 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe icacls.exe PID 2916 wrote to memory of 3772 2916 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe icacls.exe PID 2916 wrote to memory of 2864 2916 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 2916 wrote to memory of 2864 2916 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 2916 wrote to memory of 2864 2916 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 2864 wrote to memory of 1996 2864 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 2864 wrote to memory of 1996 2864 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 2864 wrote to memory of 1996 2864 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 2864 wrote to memory of 1996 2864 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 2864 wrote to memory of 1996 2864 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 2864 wrote to memory of 1996 2864 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 2864 wrote to memory of 1996 2864 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 2864 wrote to memory of 1996 2864 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 2864 wrote to memory of 1996 2864 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe PID 2864 wrote to memory of 1996 2864 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe 4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe"C:\Users\Admin\AppData\Local\Temp\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe"C:\Users\Admin\AppData\Local\Temp\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.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\c7f5879b-deb1-40b3-92fd-1dad4443444c" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe"C:\Users\Admin\AppData\Local\Temp\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exe"C:\Users\Admin\AppData\Local\Temp\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.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\Local\c7f5879b-deb1-40b3-92fd-1dad4443444c\4eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a.exeFilesize
749KB
MD5cf3c3f6d06eb8dd404cc00985d48aac9
SHA118983221c5bddef39d652c56aaf86ebbe0b543ee
SHA2564eef5e028393fef4a08e76a3f92de13f3de5d6289ea873e488cdc4d48729bd2a
SHA51296bab63db330605f3a1ae3394b685bf2d21e257341723d440a9277cad6b971b403a8a29ae692ca6c2f1e7e5060765111120c1bfc87132befee658da71038ecd4
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memory/1996-25-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/1996-18-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/1996-31-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/1996-29-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/1996-16-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/1996-28-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/1996-27-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/1996-15-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/1996-17-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2916-1-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2916-12-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2916-4-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2916-2-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2916-6-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4816-5-0x00000000049B0000-0x0000000004ACB000-memory.dmpFilesize
1.1MB
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memory/4816-3-0x0000000003000000-0x00000000030A0000-memory.dmpFilesize
640KB