Analysis
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max time kernel
142s -
max time network
123s -
platform
windows11-21h2_x64 -
resource
win11-20240214-en -
resource tags
arch:x64arch:x86image:win11-20240214-enlocale:en-usos:windows11-21h2-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 18 IoCs
resource yara_rule behavioral2/memory/1740-2-0x0000000004B40000-0x0000000004C5B000-memory.dmp family_djvu behavioral2/memory/2800-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2800-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2800-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2800-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2800-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2092-20-0x0000000002FF0000-0x000000000308C000-memory.dmp family_djvu behavioral2/memory/4104-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4104-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4104-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4104-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4104-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4104-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4104-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4104-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4104-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4104-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4104-39-0x0000000000400000-0x0000000000537000-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 1844 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2567984660-2719943099-2683635618-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\972c59d6-0672-4da8-843e-dccb60b16645\\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 1 api.2ip.ua 2 api.2ip.ua 7 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 1740 set thread context of 2800 1740 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 77 PID 2092 set thread context of 4104 2092 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 82 -
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 2800 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 2800 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 4104 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 4104 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 1740 wrote to memory of 2800 1740 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 77 PID 1740 wrote to memory of 2800 1740 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 77 PID 1740 wrote to memory of 2800 1740 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 77 PID 1740 wrote to memory of 2800 1740 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 77 PID 1740 wrote to memory of 2800 1740 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 77 PID 1740 wrote to memory of 2800 1740 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 77 PID 1740 wrote to memory of 2800 1740 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 77 PID 1740 wrote to memory of 2800 1740 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 77 PID 1740 wrote to memory of 2800 1740 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 77 PID 1740 wrote to memory of 2800 1740 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 77 PID 2800 wrote to memory of 1844 2800 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 78 PID 2800 wrote to memory of 1844 2800 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 78 PID 2800 wrote to memory of 1844 2800 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 78 PID 2800 wrote to memory of 2092 2800 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 79 PID 2800 wrote to memory of 2092 2800 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 79 PID 2800 wrote to memory of 2092 2800 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 79 PID 2092 wrote to memory of 4104 2092 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 82 PID 2092 wrote to memory of 4104 2092 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 82 PID 2092 wrote to memory of 4104 2092 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 82 PID 2092 wrote to memory of 4104 2092 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 82 PID 2092 wrote to memory of 4104 2092 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 82 PID 2092 wrote to memory of 4104 2092 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 82 PID 2092 wrote to memory of 4104 2092 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 82 PID 2092 wrote to memory of 4104 2092 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 82 PID 2092 wrote to memory of 4104 2092 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 82 PID 2092 wrote to memory of 4104 2092 bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe 82
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:1740 -
C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe"C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2800 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\972c59d6-0672-4da8-843e-dccb60b16645" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1844
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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:2092 -
C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe"C:\Users\Admin\AppData\Local\Temp\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4104
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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
MD5a8a6decac88caae3b60459b14c01e907
SHA1daeb406b57bb1ad2d0367fb12a02b5ddc54dae4b
SHA256e5bb1089eb3791d14638e235a0dcc91afa1c7a3d5350b4ea0b5f75d17c2dc5af
SHA5125cbb9ab87eb60c3dcdacf621bd57b8e0d7e5eb588934d2b61e2a95e042928cd3125f243f4347ebaf13696fb2a9c0da33c909383e992af71d36ed2828cfab51ad
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD57965b46f6938502199f3fa3b6316c862
SHA1cd6c705029b6dcb446d555a21bf0b6d1bff32123
SHA256c2f8e09f97308014b56dfdad627b1ac2c11e89c98941ea216bcaf91887b02bc5
SHA512c431864e2cc8b9499a0b7587ddc24ea5360b31c1e8f7ac56f0de3807b6bebf3dfa6862d3421164b355f5480b3f4bebbef63220dbc9e823011177f754edf6f820
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C:\Users\Admin\AppData\Local\972c59d6-0672-4da8-843e-dccb60b16645\bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d.exe
Filesize771KB
MD53673d9d72e9a1c772c4893f20f87d106
SHA19b345d65d056afb21352dd1ae43c18bae3bcd7c0
SHA256bbf4bf6d8f4ae6601964a7886f93cdb7e2389cb073a0675f738af95f3dbad32d
SHA512320e6945b6eb7cb37e8a4c4dc307687993765c07faa7c225ed0cfa8903500f7ccd8c7e6a672104bf7749858f35ffd4b744532bd88da4208c4210f55f9ab0a509