Analysis
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max time kernel
147s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-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 behavioral1/memory/5060-2-0x0000000004A30000-0x0000000004B4B000-memory.dmp family_djvu behavioral1/memory/1472-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1472-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1472-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1472-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1472-15-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2508-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2508-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2508-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2508-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2508-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2508-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2508-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2508-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2508-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2508-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2508-37-0x0000000000400000-0x0000000000537000-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-1-5-21-776854024-226333264-2052258302-1000\Control Panel\International\Geo\Nation 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 3492 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-776854024-226333264-2052258302-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\0c4848a0-d056-4bf9-821b-96f4bc6d743a\\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 26 api.2ip.ua 27 api.2ip.ua 35 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 5060 set thread context of 1472 5060 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 4488 set thread context of 2508 4488 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 97 -
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 1472 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 1472 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 2508 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 2508 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 5060 wrote to memory of 1472 5060 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 5060 wrote to memory of 1472 5060 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 5060 wrote to memory of 1472 5060 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 5060 wrote to memory of 1472 5060 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 5060 wrote to memory of 1472 5060 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 5060 wrote to memory of 1472 5060 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 5060 wrote to memory of 1472 5060 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 5060 wrote to memory of 1472 5060 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 5060 wrote to memory of 1472 5060 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 5060 wrote to memory of 1472 5060 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 86 PID 1472 wrote to memory of 3492 1472 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 90 PID 1472 wrote to memory of 3492 1472 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 90 PID 1472 wrote to memory of 3492 1472 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 90 PID 1472 wrote to memory of 4488 1472 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 92 PID 1472 wrote to memory of 4488 1472 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 92 PID 1472 wrote to memory of 4488 1472 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 92 PID 4488 wrote to memory of 2508 4488 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 97 PID 4488 wrote to memory of 2508 4488 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 97 PID 4488 wrote to memory of 2508 4488 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 97 PID 4488 wrote to memory of 2508 4488 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 97 PID 4488 wrote to memory of 2508 4488 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 97 PID 4488 wrote to memory of 2508 4488 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 97 PID 4488 wrote to memory of 2508 4488 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 97 PID 4488 wrote to memory of 2508 4488 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 97 PID 4488 wrote to memory of 2508 4488 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 97 PID 4488 wrote to memory of 2508 4488 71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe 97
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:5060 -
C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe"C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1472 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\0c4848a0-d056-4bf9-821b-96f4bc6d743a" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3492
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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:4488 -
C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe"C:\Users\Admin\AppData\Local\Temp\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2508
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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
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
MD5b3b455ac23970e6752a0845e70df81ce
SHA1b1edc1e89a93421dd6e12441b5383c8f9d231272
SHA2568d20183789e2a2bbdaa48b2c78aa287abd8ed33e935942862755eaf0259d2c30
SHA5121b08ded060db3f95330f0b6c14373c8ef9ada68153f4ef766d9802c79ae0d9cfcb8c9473e63f12ddbdfc63cb76a840c6d00c6fdf28110b39b748e50332a85fd1
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5f83226d8b7744b693b9089e623b22664
SHA12472fe76b8d706ed072638ab5d03d71283defcdb
SHA25640a2845cf337d027cf6ef2395855bdbab0f06398761053043ec7b3143402cb2e
SHA51297530a24fff295273d2d5f202c97a327e8c9c174691bc21970c03d4b695f2b661554ff69c56f8ec88cbf759e0fb127caa441b477ea85e1a977d35838dada6003
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C:\Users\Admin\AppData\Local\0c4848a0-d056-4bf9-821b-96f4bc6d743a\71d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364.exe
Filesize774KB
MD5d201b331c5953dd3271f84a687e893b4
SHA118f7ec36314d7eb2dfb695a1d6629ef17a45ba62
SHA25671d99e9227e443da504412e4ead3349451b1205e302e3c5900040c226516b364
SHA5124d93d9d6876ee49fd9878ea0f35e09ba1798a33bad8d0b0a54696c48c8f9a147f57de7c9947f06fbdf4853a9a9161e06a167a3db4531ded9adbfa52de67741c0