Analysis
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max time kernel
147s -
max time network
151s -
platform
windows11-21h2_x64 -
resource
win11-20240412-en -
resource tags
arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system -
submitted
16/04/2024, 04:32
Static task
static1
Behavioral task
behavioral1
Sample
71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral2
Sample
71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe
Resource
win11-20240412-en
General
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Target
71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe
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Size
774KB
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MD5
d201b331c5953dd3271f84a687e893b4
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SHA1
18f7ec36314d7eb2dfb695a1d6629ef17a45ba62
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SHA256
71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364
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SHA512
4d93d9d6876ee49fd9878ea0f35e09ba1798a33bad8d0b0a54696c48c8f9a147f57de7c9947f06fbdf4853a9a9161e06a167a3db4531ded9adbfa52de67741c0
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SSDEEP
24576:42B0dAqubtqQKHYxDlZpOlClp4iJ6CEK:edAVoQKHYBoAF6CE
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 behavioral2/memory/3352-2-0x0000000004A90000-0x0000000004BAB000-memory.dmp family_djvu behavioral2/memory/4840-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4840-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4840-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4840-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4840-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2148-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2148-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2148-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2148-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2148-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2148-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2148-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2148-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2148-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2148-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2148-39-0x0000000000400000-0x0000000000537000-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 1556 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2516240262-2296879883-3965305654-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b590dbf0-80f1-456f-aff1-230e3d952627\\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe\" --AutoStart" 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.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 3352 set thread context of 4840 3352 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 81 PID 2216 set thread context of 2148 2216 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 -
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 4840 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 4840 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 2148 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 2148 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 3352 wrote to memory of 4840 3352 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 81 PID 3352 wrote to memory of 4840 3352 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 81 PID 3352 wrote to memory of 4840 3352 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 81 PID 3352 wrote to memory of 4840 3352 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 81 PID 3352 wrote to memory of 4840 3352 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 81 PID 3352 wrote to memory of 4840 3352 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 81 PID 3352 wrote to memory of 4840 3352 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 81 PID 3352 wrote to memory of 4840 3352 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 81 PID 3352 wrote to memory of 4840 3352 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 81 PID 3352 wrote to memory of 4840 3352 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 81 PID 4840 wrote to memory of 1556 4840 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 82 PID 4840 wrote to memory of 1556 4840 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 82 PID 4840 wrote to memory of 1556 4840 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 82 PID 4840 wrote to memory of 2216 4840 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 83 PID 4840 wrote to memory of 2216 4840 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 83 PID 4840 wrote to memory of 2216 4840 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 83 PID 2216 wrote to memory of 2148 2216 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 2216 wrote to memory of 2148 2216 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 2216 wrote to memory of 2148 2216 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 2216 wrote to memory of 2148 2216 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 2216 wrote to memory of 2148 2216 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 2216 wrote to memory of 2148 2216 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 2216 wrote to memory of 2148 2216 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 2216 wrote to memory of 2148 2216 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 2216 wrote to memory of 2148 2216 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 2216 wrote to memory of 2148 2216 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe"C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3352 -
C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe"C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4840 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\b590dbf0-80f1-456f-aff1-230e3d952627" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1556
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C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe"C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2216 -
C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe"C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2148
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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
MD577fff4010e48018b867bb350fb78b7c2
SHA131b0dfcc0b92a789cd5c94dbf8d0f5aca820ed31
SHA2563e95094f49fea7951fb5ea5551a8b344c1ec16ddaf4f5da7b6bfe1151afa9ee5
SHA51278a8fc7de1b3cbbc2225790bf55fd64b3c7fa922b4601dcbb1103cc12491da71ebae1eebfaa3a2ce2e0b3b3a7b7229dd448012c23a707f84aae8fe0e996c7e89
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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
MD53b54db73024a1b2367f67c0831f8c926
SHA1937636f43594602a4c474b4d55720ea808c8781e
SHA256674c176ae6c9cb5ebf5dede4da1de6b7bcde4cd0dc15313dc94cfc15d74227d2
SHA512984908f27fe007ed5df9ce9c89b8b8043e4264e441b00d6658d10d38b9d2ed4363e806dcc4fe0b76895194e0e32197571e661ece52e9103683dc4f64e81831d4
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD53f1c31c7ee904fc443740315cd6a640a
SHA1a6529bdd6a64376f2c8667d8a291ebd8f1802f9a
SHA256d1942e3921c03b7fd20a308aceda293c71c61a2beb34638dd61b95f1c088d190
SHA5127073e45cb948165bf1fc04fe2ebb183e17a4b093412e42f84c5881a18e5d868bb44caeb377f12dab1608d630a3790badcdc99847eb51427b885b7358201910c7
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C:\Users\Admin\AppData\Local\b590dbf0-80f1-456f-aff1-230e3d952627\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe
Filesize774KB
MD5d201b331c5953dd3271f84a687e893b4
SHA118f7ec36314d7eb2dfb695a1d6629ef17a45ba62
SHA25671d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364
SHA5124d93d9d6876ee49fd9878ea0f35e09ba1798a33bad8d0b0a54696c48c8f9a147f57de7c9947f06fbdf4853a9a9161e06a167a3db4531ded9adbfa52de67741c0