Analysis
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max time kernel
141s -
max time network
125s -
platform
windows11-21h2_x64 -
resource
win11-20240508-en -
resource tags
arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system -
submitted
23-05-2024 19:46
Static task
static1
Behavioral task
behavioral1
Sample
75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
Resource
win11-20240508-en
General
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Target
75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
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Size
771KB
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MD5
d07907a0efa31135f9392fa623d821bf
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SHA1
942c7783ad119e8f8f7b54035793c501e4204f0e
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SHA256
75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca
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SHA512
6794144445c5d8b4ea64291cd72ddf25a536a7c96d9eeb88c71e0a0094651168ad8a9205caf5ec5da6b0b46b3f26def663f578369a1b3a084343c44e59dc455a
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SSDEEP
12288:gdY2I03rbaek5sc5pYca5CEAkMQYoI+EEi4KbzjgZ2xa80/gNYWzjWno:gdYHNSRi44jgZyaxAWno
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
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Signatures
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Detected Djvu ransomware 15 IoCs
Processes:
resource yara_rule behavioral2/memory/4600-2-0x0000000003E70000-0x0000000003F8B000-memory.dmp family_djvu behavioral2/memory/2568-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2568-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2568-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2568-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2568-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2076-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2076-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2076-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2076-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2076-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2076-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2076-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2076-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2076-37-0x0000000000400000-0x0000000000537000-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:
75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3001105534-2705918504-2956618779-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\fe2e814b-4f27-4afa-8774-77cf5ce49438\\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe\" --AutoStart" 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.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 2 api.2ip.ua 6 api.2ip.ua 1 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exedescription pid process target process PID 4600 set thread context of 2568 4600 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 1348 set thread context of 2076 1348 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.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:
75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exepid process 2568 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 2568 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 2076 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 2076 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exedescription pid process target process PID 4600 wrote to memory of 2568 4600 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 4600 wrote to memory of 2568 4600 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 4600 wrote to memory of 2568 4600 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 4600 wrote to memory of 2568 4600 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 4600 wrote to memory of 2568 4600 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 4600 wrote to memory of 2568 4600 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 4600 wrote to memory of 2568 4600 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 4600 wrote to memory of 2568 4600 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 4600 wrote to memory of 2568 4600 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 4600 wrote to memory of 2568 4600 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 2568 wrote to memory of 4216 2568 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe icacls.exe PID 2568 wrote to memory of 4216 2568 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe icacls.exe PID 2568 wrote to memory of 4216 2568 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe icacls.exe PID 2568 wrote to memory of 1348 2568 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 2568 wrote to memory of 1348 2568 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 2568 wrote to memory of 1348 2568 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 1348 wrote to memory of 2076 1348 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 1348 wrote to memory of 2076 1348 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 1348 wrote to memory of 2076 1348 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 1348 wrote to memory of 2076 1348 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 1348 wrote to memory of 2076 1348 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 1348 wrote to memory of 2076 1348 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 1348 wrote to memory of 2076 1348 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 1348 wrote to memory of 2076 1348 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 1348 wrote to memory of 2076 1348 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe PID 1348 wrote to memory of 2076 1348 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe 75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe"C:\Users\Admin\AppData\Local\Temp\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe"C:\Users\Admin\AppData\Local\Temp\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.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\fe2e814b-4f27-4afa-8774-77cf5ce49438" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe"C:\Users\Admin\AppData\Local\Temp\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exe"C:\Users\Admin\AppData\Local\Temp\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.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
MD59e130b50184e39e32205c9dd3befee15
SHA1150b8bfb3208d3a854996e02c1470d81530335b5
SHA2567b5bd8bc8ac2cd655c212c4790e5d9a259046730a9f0bb51616b036da55d2c50
SHA5123cf76690e692c874792fa99d6358ebdd3596bab33bede653067375fc7de617eb7f150f52e640d34b2d51dcbe39c5bb88381bdc0279054ab65d5f1492d89f648f
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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
MD540cf2f6e5aecbf76691f9a64bfb39335
SHA13bfb6a0d4d7443878bfa28c957f467fe41ec813e
SHA2568fc7877a6cf63076d277a2e06cb3c3bd1d63a39364cd022a565ff9b3214d6972
SHA512fe5ccd690bf2eb88fda155e8f8b50f78435838042be44c5ccf65edceb981f2ce7c08c89780f37684f085279b78a5ae1693e1e0e219148afe924b646aab1f38ed
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
392B
MD5b9e27e752632793ce33252e14b0e5447
SHA10b605bc1509c96b01b6c82fdc6ffaf2068a22e7d
SHA2565bd1db3f5f186799fa5750557a8ff88eba6e7b00105f38aa33d047da26925b40
SHA512aa6c0da0f44f09192b7c99d7f20a9f5143e62bb8d637015ef8d77ea8dc7024a434c00d9f05bd03eb42abc170a9c44f2b18927bae91f530add30d3ae09ad0057a
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C:\Users\Admin\AppData\Local\fe2e814b-4f27-4afa-8774-77cf5ce49438\75fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca.exeFilesize
771KB
MD5d07907a0efa31135f9392fa623d821bf
SHA1942c7783ad119e8f8f7b54035793c501e4204f0e
SHA25675fdcad9646ad3fa16eb6958f285a073a77ab99d08aa8653f09b990f5c57cdca
SHA5126794144445c5d8b4ea64291cd72ddf25a536a7c96d9eeb88c71e0a0094651168ad8a9205caf5ec5da6b0b46b3f26def663f578369a1b3a084343c44e59dc455a
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memory/2076-29-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2076-28-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2076-34-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2076-22-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2076-36-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2076-35-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2076-32-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2076-37-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2076-27-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2568-6-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2568-5-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2568-4-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2568-3-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2568-19-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4600-1-0x0000000002370000-0x000000000240D000-memory.dmpFilesize
628KB
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memory/4600-2-0x0000000003E70000-0x0000000003F8B000-memory.dmpFilesize
1.1MB