Analysis
- max time kernel
149s - max time network
156s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system - submitted
12/01/2024, 23:05
Static task
static1
Behavioral task
behavioral1
Sample
26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe
Resource
win10v2004-20231215-en
General
- Target 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe
- Size 684KB
- Sample240112-225daaffcr
- SHA256 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7
- MD5 d3d46d0339ceb24c85568e75f78846a7
- SHA1 36f63066beba540453e1b93e6b1e282aed804234
- SHA512 d669aaafddb658f88dd6d325883d7b568b9e6b6dc5914b0d7d9d01cf468f0e0521e05e5a7f46e0437e9389470f4f5ec751b416b94412956c2a208b0bccc8227c
- SSDEEP 12288:vE1Gh9OfPNkHH1fl8Zjc38izOfdXacgGeOM0GejX6B:qM9ZZl4mGXjxeOMg4
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Extracted
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djvu
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http://zexeq.com/test1/get.php
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extension
.cdqw
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offline_id
mMsRxMUuXypapZbGOAfxD9pczHmW8zVRP7Pgjwt1
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payload_url
http://brusuax.com/dl/build2.exe
http://zexeq.com/files/1/build3.exe
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ransomnote
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Signatures
- Detect Vidar Stealer 5 IoCs
resource yara_rule behavioral2/memory/1416-49-0x0000000000400000-0x000000000065E000-memory.dmp family_vidar_v6 behavioral2/memory/1416-50-0x0000000000400000-0x000000000065E000-memory.dmp family_vidar_v6 behavioral2/memory/1416-46-0x0000000000400000-0x000000000065E000-memory.dmp family_vidar_v6 behavioral2/memory/5084-45-0x00000000006E0000-0x000000000072B000-memory.dmp family_vidar_v6 behavioral2/memory/1416-59-0x0000000000400000-0x000000000065E000-memory.dmp family_vidar_v6 - Detected Djvu ransomware 18 IoCs
resource yara_rule behavioral2/memory/4556-2-0x0000000002720000-0x000000000283B000-memory.dmp family_djvu behavioral2/memory/4836-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4836-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4836-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4836-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4836-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3076-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3076-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3076-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3076-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3076-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3076-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3076-51-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3076-54-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3076-56-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3076-57-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3076-58-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3076-62-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu - Djvu Ransomware
Ransomware which is a variant of the STOP family.
- Downloads MZ/PE file
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe Key value queried \REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe - Executes dropped EXE 2 IoCs
pid Process 5084 build2.exe 1416 build2.exe - Modifies file permissions 1 TTPs 1 IoCs
pid Process 1684 icacls.exe - Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e3d34435-2f61-48c3-b95f-d469161890e3\\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe\" --AutoStart" 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.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 12 api.2ip.ua 13 api.2ip.ua 32 api.2ip.ua - Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 4556 set thread context of 4836 4556 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 90 PID 4784 set thread context of 3076 4784 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 94 PID 5084 set thread context of 1416 5084 build2.exe 103 - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
pid pid_target Process procid_target 1216 1416 WerFault.exe 103 - Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 4836 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 4836 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 3076 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 3076 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe - Suspicious use of WriteProcessMemory 39 IoCs
description pid Process procid_target PID 4556 wrote to memory of 4836 4556 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 90 PID 4556 wrote to memory of 4836 4556 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 90 PID 4556 wrote to memory of 4836 4556 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 90 PID 4556 wrote to memory of 4836 4556 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 90 PID 4556 wrote to memory of 4836 4556 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 90 PID 4556 wrote to memory of 4836 4556 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 90 PID 4556 wrote to memory of 4836 4556 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 90 PID 4556 wrote to memory of 4836 4556 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 90 PID 4556 wrote to memory of 4836 4556 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 90 PID 4556 wrote to memory of 4836 4556 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 90 PID 4836 wrote to memory of 1684 4836 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 91 PID 4836 wrote to memory of 1684 4836 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 91 PID 4836 wrote to memory of 1684 4836 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 91 PID 4836 wrote to memory of 4784 4836 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 92 PID 4836 wrote to memory of 4784 4836 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 92 PID 4836 wrote to memory of 4784 4836 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 92 PID 4784 wrote to memory of 3076 4784 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 94 PID 4784 wrote to memory of 3076 4784 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 94 PID 4784 wrote to memory of 3076 4784 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 94 PID 4784 wrote to memory of 3076 4784 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 94 PID 4784 wrote to memory of 3076 4784 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 94 PID 4784 wrote to memory of 3076 4784 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 94 PID 4784 wrote to memory of 3076 4784 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 94 PID 4784 wrote to memory of 3076 4784 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 94 PID 4784 wrote to memory of 3076 4784 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 94 PID 4784 wrote to memory of 3076 4784 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 94 PID 3076 wrote to memory of 5084 3076 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 102 PID 3076 wrote to memory of 5084 3076 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 102 PID 3076 wrote to memory of 5084 3076 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe 102 PID 5084 wrote to memory of 1416 5084 build2.exe 103 PID 5084 wrote to memory of 1416 5084 build2.exe 103 PID 5084 wrote to memory of 1416 5084 build2.exe 103 PID 5084 wrote to memory of 1416 5084 build2.exe 103 PID 5084 wrote to memory of 1416 5084 build2.exe 103 PID 5084 wrote to memory of 1416 5084 build2.exe 103 PID 5084 wrote to memory of 1416 5084 build2.exe 103 PID 5084 wrote to memory of 1416 5084 build2.exe 103 PID 5084 wrote to memory of 1416 5084 build2.exe 103 PID 5084 wrote to memory of 1416 5084 build2.exe 103
Processes
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C:\Users\Admin\AppData\Local\Temp\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe"C:\Users\Admin\AppData\Local\Temp\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4556 -
C:\Users\Admin\AppData\Local\Temp\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe"C:\Users\Admin\AppData\Local\Temp\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4836 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\e3d34435-2f61-48c3-b95f-d469161890e3" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1684
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C:\Users\Admin\AppData\Local\Temp\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe"C:\Users\Admin\AppData\Local\Temp\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4784 -
C:\Users\Admin\AppData\Local\Temp\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe"C:\Users\Admin\AppData\Local\Temp\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3076 -
C:\Users\Admin\AppData\Local\8df46cca-24f9-4ee0-8d85-1b5fbff29302\build2.exe"C:\Users\Admin\AppData\Local\8df46cca-24f9-4ee0-8d85-1b5fbff29302\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5084 -
C:\Users\Admin\AppData\Local\8df46cca-24f9-4ee0-8d85-1b5fbff29302\build2.exe"C:\Users\Admin\AppData\Local\8df46cca-24f9-4ee0-8d85-1b5fbff29302\build2.exe"6⤵
- Executes dropped EXE
PID:1416 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1416 -s 22367⤵
- Program crash
PID:1216
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1416 -ip 14161⤵PID:5092
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
- Size 1KB
- SHA256 5ef8b74df59ad2233b8d40cea334c416975a910ea76892cb3946016a5602aa73
- MD5 1a5a4d4587426c60f5430f7d8dd2f3a4
- SHA1 e13512e746665b5da9cf6c19e36b2651edfbbb05
- SHA512 7c0d45af1577fea5649db6050195dbd5f129e2a0503171f02ccc5053f443ff294f2fd413070e613b30a80461bd88a24d77f769b4f76fb96552e79485a2bc7bcb
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
- Size 724B
- SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
- MD5 8202a1cd02e7d69597995cabbe881a12
- SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
- SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
- Size 410B
- SHA256 9b74ff5006f2221848deaf51ef368d125e8445b207f2375c9ff33bd5dc145ed0
- MD5 6534bbb869046f357dab474d190706b7
- SHA1 8091ba18299e6acbc9d8d56ebbb909dd0d56dac3
- SHA512 34241567c41e0fd8676b4ff5d9cdd44abb40de804eaee5efb25e6fefcd2d899a7586520904e070f967b5ad2289758cb460745763caf1bb960c61a803389c6b11
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
- Size 392B
- SHA256 45223f4f01fe5260a85aca9b3a29d21878e47f27a78d6aa02348e19eb059bb74
- MD5 c24d988b6f55c9a54712a90caa22b30e
- SHA1 ae9a97e8b5361daf9ac6cf58e480648c7995217a
- SHA512 93858854c1c1028e579f3b01d265ef2a56dadd9177d75de5eae216e91c05f50899d975e6f3fb5b1cfb864d36c3419596e91dd6a1c2c139f104fd3b068a201097
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\Local\8df46cca-24f9-4ee0-8d85-1b5fbff29302\build2.exe
- Size 358KB
- SHA256 26063c78e5418610471a9f3a00a155d7d1e5b29856e1979ba3bdc42681a871d0
- MD5 c4070da9f9b0581171af16e681ccdff8
- SHA1 3fb4182921fdc3acd7873ebe113ac5522585312a
- SHA512 c7569cea7f1a841e7cac9cd41287dba3bcacf2cf9dee7bece88800848a7ad5dc4cd2bdc896c7389f0f1144079bbe168048b3f722bcd76fa5d6e14f3081bb6427
- SSDEEP 6144:pfLgtyckjU51Vc7lLUvTlR2agQAYNMQSnjbeg:pfMtycGU5/klLUvTlR5Aiuv
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\e3d34435-2f61-48c3-b95f-d469161890e3\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe
- Size 684KB
- SHA256 26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7
- MD5 d3d46d0339ceb24c85568e75f78846a7
- SHA1 36f63066beba540453e1b93e6b1e282aed804234
- SHA512 d669aaafddb658f88dd6d325883d7b568b9e6b6dc5914b0d7d9d01cf468f0e0521e05e5a7f46e0437e9389470f4f5ec751b416b94412956c2a208b0bccc8227c
- SSDEEP 12288:vE1Gh9OfPNkHH1fl8Zjc38izOfdXacgGeOM0GejX6B:qM9ZZl4mGXjxeOMg4
- MD5 SHA1 SHA512 SSDEEP