Analysis
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max time kernel
147s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
09/04/2024, 09:20
Static task
static1
Behavioral task
behavioral1
Sample
bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral2
Sample
bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe
Resource
win11-20240214-en
General
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Target
bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe
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Size
771KB
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MD5
3673d9d72e9a1c772c4893f20f87d106
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SHA1
9b345d65d056afb21352dd1ae43c18bae3bcd7c0
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SHA256
bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d
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SHA512
320e6945b6eb7cb37e8a4c4dc307687993765c07faa7c225ed0cfa8903500f7ccd8c7e6a672104bf7749858f35ffd4b744532bd88da4208c4210f55f9ab0a509
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SSDEEP
12288:fnpOZS2Q/3MXnCZLB0WZWkWn6xxVKqOlTsADs/37nNAtZb616:MSy8nZWb6jGlTVg/LnqtZWs
Malware Config
Extracted
djvu
http://sajdfue.com/test2/get.php
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extension
.uazq
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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 17 IoCs
resource yara_rule behavioral1/memory/3004-2-0x0000000004B90000-0x0000000004CAB000-memory.dmp family_djvu behavioral1/memory/1748-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1748-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1748-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1748-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1748-18-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2136-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2136-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2136-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2136-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2136-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2136-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2136-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2136-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2136-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2136-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2136-39-0x0000000000400000-0x0000000000537000-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.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 4576 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f8a8f0b9-7ca5-4685-8343-4ed8e8ba22b9\\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe\" --AutoStart" bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.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 3 api.2ip.ua 4 api.2ip.ua 19 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 3004 set thread context of 1748 3004 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 86 PID 4968 set thread context of 2136 4968 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 93 -
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 1748 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 1748 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 2136 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 2136 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 3004 wrote to memory of 1748 3004 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 86 PID 3004 wrote to memory of 1748 3004 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 86 PID 3004 wrote to memory of 1748 3004 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 86 PID 3004 wrote to memory of 1748 3004 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 86 PID 3004 wrote to memory of 1748 3004 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 86 PID 3004 wrote to memory of 1748 3004 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 86 PID 3004 wrote to memory of 1748 3004 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 86 PID 3004 wrote to memory of 1748 3004 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 86 PID 3004 wrote to memory of 1748 3004 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 86 PID 3004 wrote to memory of 1748 3004 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 86 PID 1748 wrote to memory of 4576 1748 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 89 PID 1748 wrote to memory of 4576 1748 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 89 PID 1748 wrote to memory of 4576 1748 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 89 PID 1748 wrote to memory of 4968 1748 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 90 PID 1748 wrote to memory of 4968 1748 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 90 PID 1748 wrote to memory of 4968 1748 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 90 PID 4968 wrote to memory of 2136 4968 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 93 PID 4968 wrote to memory of 2136 4968 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 93 PID 4968 wrote to memory of 2136 4968 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 93 PID 4968 wrote to memory of 2136 4968 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 93 PID 4968 wrote to memory of 2136 4968 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 93 PID 4968 wrote to memory of 2136 4968 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 93 PID 4968 wrote to memory of 2136 4968 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 93 PID 4968 wrote to memory of 2136 4968 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 93 PID 4968 wrote to memory of 2136 4968 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 93 PID 4968 wrote to memory of 2136 4968 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 93
Processes
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C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe"C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3004 -
C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe"C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1748 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\f8a8f0b9-7ca5-4685-8343-4ed8e8ba22b9" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4576
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C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe"C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4968 -
C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe"C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2136
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
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
MD568942175603ad5a678766b0531422f70
SHA18fb740b104b1b6e1653fd0b54bebeba3bfb740dc
SHA256eccc37e09f5aab5322800e2621852e8ce1762a317e60aa598fcd11c746bedd29
SHA512da13dd40bc634cb3f5409b44b2c27bdeb7f011757cc794cd554f5bb4547a1f9aac1821c2582fe45aa0e3b2a3491f7dca1b8fb5715a6145764b55285257d52589
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD58b04dc782cb59efccd211451ce19fd07
SHA19a16734d3eb4249b38b965624d65d080555af1d3
SHA256cbad0e5ccd5796c459f7cae553d0bed4caa0da2cbd4eb864c3952897d0a6aa46
SHA512ea70c446bbd45e603dec6837872f38bd76c7abff2a9893cf8212edac04d1da028961c05d69d91d980b1134fdf1880dfeaffebb3743ad24c340d91f50909d59d2
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C:\Users\Admin\AppData\Local\f8a8f0b9-7ca5-4685-8343-4ed8e8ba22b9\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe
Filesize771KB
MD53673d9d72e9a1c772c4893f20f87d106
SHA19b345d65d056afb21352dd1ae43c18bae3bcd7c0
SHA256bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d
SHA512320e6945b6eb7cb37e8a4c4dc307687993765c07faa7c225ed0cfa8903500f7ccd8c7e6a672104bf7749858f35ffd4b744532bd88da4208c4210f55f9ab0a509