Analysis
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max time kernel
146s -
max time network
130s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
22-05-2024 12:42
Static task
static1
Behavioral task
behavioral1
Sample
81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe
Resource
win11-20240508-en
General
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Target
81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe
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Size
707KB
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MD5
468a3f5c25350ab961951730de8c4ede
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SHA1
d8ff3e77681ab16fb0da2bf80bd1fd76aae75b7c
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SHA256
81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc
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SHA512
0ed8087d988a9b2f0ff3572e29b720890e24ccc1423c7f6d1260992197033018cc415c60d4f0d22c80c7d329b83daae0a27dc98d341e5563fef209a20b05f69d
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SSDEEP
12288:YSQYWaFRQdi4YyslM3FqvlVdfQ9gqSXHTSPT/HqoBMfffJJlh4jUHDixdSVHA:YSQwFROi4hF1+bdIKLXwTRufff8U+vSq
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
-
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 behavioral1/memory/4952-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/932-4-0x0000000004A00000-0x0000000004B1B000-memory.dmp family_djvu behavioral1/memory/4952-2-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4952-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4952-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4952-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1280-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1280-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1280-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1280-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1280-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1280-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1280-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1280-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1280-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\18670b35-acb2-4ccb-98f4-118fee0d294b\\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe\" --AutoStart" 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.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 5 api.2ip.ua 6 api.2ip.ua 23 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exedescription pid process target process PID 932 set thread context of 4952 932 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3368 set thread context of 1280 3368 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.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:
81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exepid process 4952 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 4952 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 1280 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 1280 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exedescription pid process target process PID 932 wrote to memory of 4952 932 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 932 wrote to memory of 4952 932 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 932 wrote to memory of 4952 932 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 932 wrote to memory of 4952 932 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 932 wrote to memory of 4952 932 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 932 wrote to memory of 4952 932 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 932 wrote to memory of 4952 932 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 932 wrote to memory of 4952 932 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 932 wrote to memory of 4952 932 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 932 wrote to memory of 4952 932 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 4952 wrote to memory of 2740 4952 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe icacls.exe PID 4952 wrote to memory of 2740 4952 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe icacls.exe PID 4952 wrote to memory of 2740 4952 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe icacls.exe PID 4952 wrote to memory of 3368 4952 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 4952 wrote to memory of 3368 4952 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 4952 wrote to memory of 3368 4952 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3368 wrote to memory of 1280 3368 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3368 wrote to memory of 1280 3368 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3368 wrote to memory of 1280 3368 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3368 wrote to memory of 1280 3368 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3368 wrote to memory of 1280 3368 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3368 wrote to memory of 1280 3368 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3368 wrote to memory of 1280 3368 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3368 wrote to memory of 1280 3368 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3368 wrote to memory of 1280 3368 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe PID 3368 wrote to memory of 1280 3368 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe 81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe"C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:932 -
C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe"C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4952 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\18670b35-acb2-4ccb-98f4-118fee0d294b" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2740 -
C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe"C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3368 -
C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe"C:\Users\Admin\AppData\Local\Temp\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:1280
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize1KB
MD56728aea2631b86a76c237508d8ba9b55
SHA17a670f95cac088313f7558869162fe01c6dc0ec9
SHA256e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b
SHA512533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize724B
MD58202a1cd02e7d69597995cabbe881a12
SHA18858d9d934b7aa9330ee73de6c476acf19929ff6
SHA25658f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA51297ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize410B
MD5616d3c6a010e479b2007212b8d9394d8
SHA14ec157977440d9f6c459a5d57d0f7357407e4322
SHA256437174dbe4c037a1661fded7ca7e43569bd8e2b7a2d79965f6257868f6c7f38d
SHA512207ef12842611a8f5a661269184712f0cc1c8320100ba0684b0b94e6f17f35f99ad077888b25d9dd061d2121e94c63e54ab14ecc1c566ba5def2ff1057dbf865
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD55d5bcba47f11c475f5a157fdf50300f3
SHA14e64de416dfea4f909ccec5b565b4ea118ffb836
SHA25672929c83c7a6bfdbb8bbfe5a938257fb7f0b10a41309720c4ef0787252e97dab
SHA5120b825bc576505c3ded5b4f8fe9e6ad4902b52026195de1fec07c805a4819fe43c10fd9f2b5ef900c9e9002113ae26c9ee5f964329f8d40af746bb5461d73fae8
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C:\Users\Admin\AppData\Local\18670b35-acb2-4ccb-98f4-118fee0d294b\81fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc.exe
Filesize707KB
MD5468a3f5c25350ab961951730de8c4ede
SHA1d8ff3e77681ab16fb0da2bf80bd1fd76aae75b7c
SHA25681fc7c9924ad00d3e9d0b8323673a8cd9298079040d2b69ad117f3253e99addc
SHA5120ed8087d988a9b2f0ff3572e29b720890e24ccc1423c7f6d1260992197033018cc415c60d4f0d22c80c7d329b83daae0a27dc98d341e5563fef209a20b05f69d