Analysis
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max time kernel
143s -
max time network
130s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
15/04/2024, 19:21
Static task
static1
Behavioral task
behavioral1
Sample
56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral2
Sample
56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe
Resource
win11-20240412-en
General
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Target
56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe
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Size
819KB
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MD5
b1e4c479c6bfc09e7af5e586b47a5215
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SHA1
a5fed6e61786e5042ffcea44250078f0bab868c5
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SHA256
56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525
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SHA512
f1a46d9d8e1485ea37d29ede20fc2c2c7a7765b27f69e8d366956ca5f675bf7f69d9e0e3f5fb2a2bdc72b16499323a8c3908e2416fc26d9b572fc1fa643227e2
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SSDEEP
12288:uMW8zlkzKDV/gRojVmiNY1XsJroBL6JN5dwP7Pqc4vD9OsfdRr9f2h91kq:uMbYRojVmiSNy82srWOOxf2jmq
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 17 IoCs
resource yara_rule behavioral1/memory/1776-2-0x0000000004A70000-0x0000000004B8B000-memory.dmp family_djvu behavioral1/memory/2364-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2364-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2364-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2364-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2364-15-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4060-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4060-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4060-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4060-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4060-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4060-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4060-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4060-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4060-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4060-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4060-37-0x0000000000400000-0x0000000000537000-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-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 4100 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\8d376c37-2cac-475a-a0b6-4652508c9ca7\\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe\" --AutoStart" 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.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 10 api.2ip.ua 11 api.2ip.ua 26 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 1776 set thread context of 2364 1776 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 86 PID 2704 set thread context of 4060 2704 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 91 -
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 2364 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 2364 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 4060 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 4060 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 1776 wrote to memory of 2364 1776 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 86 PID 1776 wrote to memory of 2364 1776 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 86 PID 1776 wrote to memory of 2364 1776 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 86 PID 1776 wrote to memory of 2364 1776 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 86 PID 1776 wrote to memory of 2364 1776 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 86 PID 1776 wrote to memory of 2364 1776 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 86 PID 1776 wrote to memory of 2364 1776 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 86 PID 1776 wrote to memory of 2364 1776 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 86 PID 1776 wrote to memory of 2364 1776 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 86 PID 1776 wrote to memory of 2364 1776 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 86 PID 2364 wrote to memory of 4100 2364 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 88 PID 2364 wrote to memory of 4100 2364 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 88 PID 2364 wrote to memory of 4100 2364 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 88 PID 2364 wrote to memory of 2704 2364 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 89 PID 2364 wrote to memory of 2704 2364 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 89 PID 2364 wrote to memory of 2704 2364 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 89 PID 2704 wrote to memory of 4060 2704 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 91 PID 2704 wrote to memory of 4060 2704 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 91 PID 2704 wrote to memory of 4060 2704 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 91 PID 2704 wrote to memory of 4060 2704 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 91 PID 2704 wrote to memory of 4060 2704 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 91 PID 2704 wrote to memory of 4060 2704 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 91 PID 2704 wrote to memory of 4060 2704 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 91 PID 2704 wrote to memory of 4060 2704 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 91 PID 2704 wrote to memory of 4060 2704 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 91 PID 2704 wrote to memory of 4060 2704 56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe"C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1776 -
C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe"C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2364 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\8d376c37-2cac-475a-a0b6-4652508c9ca7" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4100
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C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe"C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2704 -
C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe"C:\Users\Admin\AppData\Local\Temp\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4060
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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
MD53c6a98dff2c8e5d41183fb934602bccf
SHA1389eea4f6c8b9a19dd6efd65b2c979feeb4262a7
SHA2568c5e90026091280487ae42d5c0f266528cacb6de18c7f3d693ecfdb547b06ac8
SHA512fde8e5de812641dc896e8d8182dcf4244670e431f3310aba576f0f330a9d8a4221eb7513005e9755512d0c645cbf164c4c5f8872689d2e52a58b3f39668de8fd
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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
MD573b54c0286039b6816bae576296dcde1
SHA16469d4989412faa90f12e80d323b4ea3c5ef1805
SHA256d941ce0d238c69b04519eaa36101f47f1247c64cd2f183159ddacd90670b7325
SHA512c81f618aa327feea57578248a14d876a8ff7bd91dea7617b75ce443a9eacd68515bd5228c32ab6b43cccb13a27346035d09f77f85845234858e7af59a8bb869f
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5de9de9bc2d926d063f2698043c43715b
SHA16f2677e481ac4b1af9d9ff7e2131e6638bf8105a
SHA2563473a45716e6c0a5d9582dff84a36d301f3d48c5db5f1d50e5ff5efdf701f25e
SHA512935a89d78a1e6d39944bbf33d11d6529aa947b9df9b7b85fb59e141612e331c2e9c4bfc53f49621f02114499a9d191ecc98e5a6ed10eeb2c37d86aa82a607456
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C:\Users\Admin\AppData\Local\8d376c37-2cac-475a-a0b6-4652508c9ca7\56f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525.exe
Filesize819KB
MD5b1e4c479c6bfc09e7af5e586b47a5215
SHA1a5fed6e61786e5042ffcea44250078f0bab868c5
SHA25656f554a175f5888a9bfb3cc17e3f010f2617f1e5d087601cc08781110e794525
SHA512f1a46d9d8e1485ea37d29ede20fc2c2c7a7765b27f69e8d366956ca5f675bf7f69d9e0e3f5fb2a2bdc72b16499323a8c3908e2416fc26d9b572fc1fa643227e2