Analysis
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max time kernel
142s -
max time network
123s -
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, 09:26
Static task
static1
Behavioral task
behavioral1
Sample
235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral2
Sample
235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe
Resource
win11-20240221-en
General
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Target
235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe
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Size
771KB
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MD5
ee8058320fb4a8fb8246a79f2bdc6201
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SHA1
97cc9afb26cc57eb82daa74319aaa8375175ff05
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SHA256
235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d
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SHA512
6a1b7cfc6a617a4cb9797cf4ee7791c5bb30ad8156683080e7fad00474d61fb8b1392bdfde658953d44cc41aeddfbab5ce836fc8b6b4ddae24064462942f8028
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SSDEEP
12288:OjfHuSUI79taNFbFZeZhqpPqnLyh8lEhvibAeVPao00kVCzk1vkmJuK0EqAtphYn:Hvqn2FbPeZhsphvaatuaqeOeW
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 behavioral1/memory/3848-2-0x0000000004A40000-0x0000000004B5B000-memory.dmp family_djvu behavioral1/memory/2736-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2736-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2736-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2736-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2736-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1856-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1856-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1856-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1856-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1856-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1856-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1856-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1856-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1856-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1856-39-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1856-40-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1856-41-0x0000000000400000-0x0000000000537000-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-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 4848 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-275798769-4264537674-1142822080-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\7b7a6805-12d1-45c2-a39e-612452f0ec2a\\235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe\" --AutoStart" 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.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 13 api.2ip.ua 3 api.2ip.ua 4 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 3848 set thread context of 2736 3848 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 87 PID 4084 set thread context of 1856 4084 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 94 -
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 2736 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 2736 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 1856 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 1856 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 3848 wrote to memory of 2736 3848 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 87 PID 3848 wrote to memory of 2736 3848 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 87 PID 3848 wrote to memory of 2736 3848 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 87 PID 3848 wrote to memory of 2736 3848 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 87 PID 3848 wrote to memory of 2736 3848 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 87 PID 3848 wrote to memory of 2736 3848 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 87 PID 3848 wrote to memory of 2736 3848 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 87 PID 3848 wrote to memory of 2736 3848 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 87 PID 3848 wrote to memory of 2736 3848 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 87 PID 3848 wrote to memory of 2736 3848 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 87 PID 2736 wrote to memory of 4848 2736 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 90 PID 2736 wrote to memory of 4848 2736 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 90 PID 2736 wrote to memory of 4848 2736 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 90 PID 2736 wrote to memory of 4084 2736 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 91 PID 2736 wrote to memory of 4084 2736 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 91 PID 2736 wrote to memory of 4084 2736 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 91 PID 4084 wrote to memory of 1856 4084 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 94 PID 4084 wrote to memory of 1856 4084 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 94 PID 4084 wrote to memory of 1856 4084 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 94 PID 4084 wrote to memory of 1856 4084 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 94 PID 4084 wrote to memory of 1856 4084 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 94 PID 4084 wrote to memory of 1856 4084 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 94 PID 4084 wrote to memory of 1856 4084 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 94 PID 4084 wrote to memory of 1856 4084 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 94 PID 4084 wrote to memory of 1856 4084 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 94 PID 4084 wrote to memory of 1856 4084 235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe 94
Processes
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C:\Users\Admin\AppData\Local\Temp\235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe"C:\Users\Admin\AppData\Local\Temp\235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3848 -
C:\Users\Admin\AppData\Local\Temp\235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe"C:\Users\Admin\AppData\Local\Temp\235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2736 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\7b7a6805-12d1-45c2-a39e-612452f0ec2a" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4848
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C:\Users\Admin\AppData\Local\Temp\235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe"C:\Users\Admin\AppData\Local\Temp\235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4084 -
C:\Users\Admin\AppData\Local\Temp\235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe"C:\Users\Admin\AppData\Local\Temp\235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:1856
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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
MD5b715790f51f0d2733b82e94647b9b91c
SHA11bbc5dbd2877eee1945160cb0e7310cd6ca98071
SHA256005e81e16fa80f4f5559c8d6245ac120ed0e8c1b6fb89b491a8386810ec5c44c
SHA51259fbe9a43e4b82dfb26b4ae99ca1d40c2810a153034279275f0ceaf6fff1db59342cff6b86349b84c317abbadc041415c503c01015334b10e7c0c91c08ef9082
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD516ce98ddfa8f4d2a88a765f789546876
SHA15f817515731de00def0a79f80695b537553db161
SHA25611452f53930eb6f5acc9987fce6115b36ed905092c1f33671a488be3eb877285
SHA512c9edab4969ac78da2388685a59dd6eae3e99d38ce81631bf69ae02dc9aedb081dc7d6a230c440f0be0760fe98cb2a21679b95c1864b74a5b807cc6c1d5accc6e
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C:\Users\Admin\AppData\Local\7b7a6805-12d1-45c2-a39e-612452f0ec2a\235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d.exe
Filesize771KB
MD5ee8058320fb4a8fb8246a79f2bdc6201
SHA197cc9afb26cc57eb82daa74319aaa8375175ff05
SHA256235de559e03d9801d51c0fb033284e3a74ede0fbc24d9a064a35af879f64ff3d
SHA5126a1b7cfc6a617a4cb9797cf4ee7791c5bb30ad8156683080e7fad00474d61fb8b1392bdfde658953d44cc41aeddfbab5ce836fc8b6b4ddae24064462942f8028