Analysis
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max time kernel
146s -
max time network
138s -
platform
windows11-21h2_x64 -
resource
win11-20240221-en -
resource tags
arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system -
submitted
09/04/2024, 08:02
Static task
static1
Behavioral task
behavioral1
Sample
c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral2
Sample
c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe
Resource
win11-20240221-en
General
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Target
c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe
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Size
771KB
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MD5
f797618d3ffd9c1240db9d52a9a977ac
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SHA1
51683323368d28657a2916a2c7bd0e5d3b2f2f7c
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SHA256
c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3
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SHA512
be0c7e88ca37fdc212033c70e527e99d939c62c0846a39e79c3f87d81fb1b9a38f5da835a41f6a3e73f3f1ea2fb0f1eb420a010edd78edfaf44c06595e921482
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SSDEEP
24576:e7cwUFF1eUyif8Wg5Mbc0MEK/Qt0N5AM:e7cYSg5M0p7NOM
Malware Config
Extracted
djvu
http://sajdfue.com/test1/get.php
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extension
.uajs
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offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://sajdfue.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 18 IoCs
resource yara_rule behavioral2/memory/5000-2-0x0000000004B50000-0x0000000004C6B000-memory.dmp family_djvu behavioral2/memory/1548-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1548-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1548-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1548-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1548-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4600-20-0x0000000004990000-0x0000000004A2B000-memory.dmp family_djvu behavioral2/memory/3372-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3372-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3372-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3372-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3372-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3372-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3372-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3372-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3372-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3372-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3372-40-0x0000000000400000-0x0000000000537000-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
pid Process 4868 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3084248216-1643706459-906455512-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\84c58587-00db-4012-ac72-72f4fffc2a43\\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe\" --AutoStart" c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.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.
flow ioc 1 api.2ip.ua 2 api.2ip.ua 7 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 5000 set thread context of 1548 5000 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 79 PID 4600 set thread context of 3372 4600 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 85 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1548 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 1548 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 3372 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 3372 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 5000 wrote to memory of 1548 5000 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 79 PID 5000 wrote to memory of 1548 5000 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 79 PID 5000 wrote to memory of 1548 5000 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 79 PID 5000 wrote to memory of 1548 5000 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 79 PID 5000 wrote to memory of 1548 5000 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 79 PID 5000 wrote to memory of 1548 5000 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 79 PID 5000 wrote to memory of 1548 5000 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 79 PID 5000 wrote to memory of 1548 5000 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 79 PID 5000 wrote to memory of 1548 5000 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 79 PID 5000 wrote to memory of 1548 5000 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 79 PID 1548 wrote to memory of 4868 1548 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 81 PID 1548 wrote to memory of 4868 1548 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 81 PID 1548 wrote to memory of 4868 1548 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 81 PID 1548 wrote to memory of 4600 1548 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 82 PID 1548 wrote to memory of 4600 1548 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 82 PID 1548 wrote to memory of 4600 1548 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 82 PID 4600 wrote to memory of 3372 4600 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 85 PID 4600 wrote to memory of 3372 4600 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 85 PID 4600 wrote to memory of 3372 4600 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 85 PID 4600 wrote to memory of 3372 4600 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 85 PID 4600 wrote to memory of 3372 4600 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 85 PID 4600 wrote to memory of 3372 4600 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 85 PID 4600 wrote to memory of 3372 4600 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 85 PID 4600 wrote to memory of 3372 4600 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 85 PID 4600 wrote to memory of 3372 4600 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 85 PID 4600 wrote to memory of 3372 4600 c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe"C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5000 -
C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe"C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1548 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\84c58587-00db-4012-ac72-72f4fffc2a43" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4868
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C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe"C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4600 -
C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe"C:\Users\Admin\AppData\Local\Temp\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3372
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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
MD5fc5408c48a55314c72e200b74330cac4
SHA17e8889ec3189a40e6078088927bf3612753fa628
SHA2567ea2a016d97635b1367455af2250cbf9e9c34d293829d11fc21ce905347590c4
SHA512481753ef755c188012919ea728ea0395f22b6ce83f2f9a11675be6072f154db141b2382dc62ad7c3c95e36596529176a66f40e3d118cf0e33ea8e6f716ae1d77
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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
MD524acbe75f6b0b1c9e428c74e549ff208
SHA161ced175574280d3c9d3eb1ecc4bdf7c01bbbdd5
SHA256ec6a7c3a74465ac17d68cf2960899f6eaaa85a3208931c2a3838d3347ec1dbc7
SHA51226650b47a30cbda3df09488482d36740289c4f49bad43a4b45e8e4498b35a0ccf53d5a4d465e95b0c4a1041cb651521b049a7c7ef80a5f01057449ec014810c8
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD563cdeed2ee9542c9d5d8f6c898d1b32f
SHA18976da045e280f555e18a3af4a8baa90b0402539
SHA25612e9b04f3dfd97b24a2eeafda29b88d2d847ecc87b645d2668be8bdaa65ee961
SHA51289e5596f19af064a86d8e8afc97f2579c14c92307ec16847d0bf15c2892f0453a7de54dfe675d1894254451953ba8d9fbb8f5daed68d9cbdec7e92e84bdc54f0
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C:\Users\Admin\AppData\Local\84c58587-00db-4012-ac72-72f4fffc2a43\c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3.exe
Filesize771KB
MD5f797618d3ffd9c1240db9d52a9a977ac
SHA151683323368d28657a2916a2c7bd0e5d3b2f2f7c
SHA256c9344fbec95521e5ae836c54130418c2cc6dbe94aa3b4ee606e8c2a5387230b3
SHA512be0c7e88ca37fdc212033c70e527e99d939c62c0846a39e79c3f87d81fb1b9a38f5da835a41f6a3e73f3f1ea2fb0f1eb420a010edd78edfaf44c06595e921482