Analysis
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max time kernel
150s -
max time network
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platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
15/01/2024, 10:50
Static task
static1
Behavioral task
behavioral1
Sample
5ce52f628bfa89f48f929961d04fa6c8.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
5ce52f628bfa89f48f929961d04fa6c8.exe
Resource
win10v2004-20231222-en
General
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Target
5ce52f628bfa89f48f929961d04fa6c8.exe
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Size
730KB
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MD5
5ce52f628bfa89f48f929961d04fa6c8
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SHA1
aa9c7a0e0721b6cc8a44ef28bd3b23328d8bcb7a
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SHA256
7912d5bd90e1c9427ef14e571589aab9017c823c16849976b6d2fc483fe34d10
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SHA512
a89eef90f56c652b7821d52b1695cf965cd56bf342f6747ac8bcc75a034f8a137e3ce6c37ed0a0e8ef76a7f26a8dfbab94ada5329836bd8c80a0a57873ab812c
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SSDEEP
12288:ldZWyTp94ZIAbE8+zauKD/3P1X8pBSMSjNwsAkDz11YEixpFgqzprF/qDc8FKU1t:5WyTp+ZIAglzatD39X8DSLJ1KfFgqzVx
Malware Config
Extracted
djvu
http://astdg.top/fhsgtsspen6/get.php
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extension
.nooa
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offline_id
PLtnD1U6oAmgxgJ2nJik1mY9SwUQg07CiN0zSet1
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payload_url
http://securebiz.org/dl/build2.exe
http://astdg.top/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/3688-2-0x0000000004BC0000-0x0000000004CDB000-memory.dmp family_djvu behavioral2/memory/4476-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4476-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4476-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4476-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4476-16-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1696-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1696-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1696-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1696-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1696-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1696-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1696-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1696-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1696-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1696-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1696-37-0x0000000000400000-0x0000000000537000-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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation 5ce52f628bfa89f48f929961d04fa6c8.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 2320 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\24687512-fddb-4022-8c85-a5cd2313b300\\5ce52f628bfa89f48f929961d04fa6c8.exe\" --AutoStart" 5ce52f628bfa89f48f929961d04fa6c8.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 20 api.2ip.ua 21 api.2ip.ua 37 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 3688 set thread context of 4476 3688 5ce52f628bfa89f48f929961d04fa6c8.exe 91 PID 3996 set thread context of 1696 3996 5ce52f628bfa89f48f929961d04fa6c8.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 4476 5ce52f628bfa89f48f929961d04fa6c8.exe 4476 5ce52f628bfa89f48f929961d04fa6c8.exe 1696 5ce52f628bfa89f48f929961d04fa6c8.exe 1696 5ce52f628bfa89f48f929961d04fa6c8.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 3688 wrote to memory of 4476 3688 5ce52f628bfa89f48f929961d04fa6c8.exe 91 PID 3688 wrote to memory of 4476 3688 5ce52f628bfa89f48f929961d04fa6c8.exe 91 PID 3688 wrote to memory of 4476 3688 5ce52f628bfa89f48f929961d04fa6c8.exe 91 PID 3688 wrote to memory of 4476 3688 5ce52f628bfa89f48f929961d04fa6c8.exe 91 PID 3688 wrote to memory of 4476 3688 5ce52f628bfa89f48f929961d04fa6c8.exe 91 PID 3688 wrote to memory of 4476 3688 5ce52f628bfa89f48f929961d04fa6c8.exe 91 PID 3688 wrote to memory of 4476 3688 5ce52f628bfa89f48f929961d04fa6c8.exe 91 PID 3688 wrote to memory of 4476 3688 5ce52f628bfa89f48f929961d04fa6c8.exe 91 PID 3688 wrote to memory of 4476 3688 5ce52f628bfa89f48f929961d04fa6c8.exe 91 PID 3688 wrote to memory of 4476 3688 5ce52f628bfa89f48f929961d04fa6c8.exe 91 PID 4476 wrote to memory of 2320 4476 5ce52f628bfa89f48f929961d04fa6c8.exe 92 PID 4476 wrote to memory of 2320 4476 5ce52f628bfa89f48f929961d04fa6c8.exe 92 PID 4476 wrote to memory of 2320 4476 5ce52f628bfa89f48f929961d04fa6c8.exe 92 PID 4476 wrote to memory of 3996 4476 5ce52f628bfa89f48f929961d04fa6c8.exe 94 PID 4476 wrote to memory of 3996 4476 5ce52f628bfa89f48f929961d04fa6c8.exe 94 PID 4476 wrote to memory of 3996 4476 5ce52f628bfa89f48f929961d04fa6c8.exe 94 PID 3996 wrote to memory of 1696 3996 5ce52f628bfa89f48f929961d04fa6c8.exe 97 PID 3996 wrote to memory of 1696 3996 5ce52f628bfa89f48f929961d04fa6c8.exe 97 PID 3996 wrote to memory of 1696 3996 5ce52f628bfa89f48f929961d04fa6c8.exe 97 PID 3996 wrote to memory of 1696 3996 5ce52f628bfa89f48f929961d04fa6c8.exe 97 PID 3996 wrote to memory of 1696 3996 5ce52f628bfa89f48f929961d04fa6c8.exe 97 PID 3996 wrote to memory of 1696 3996 5ce52f628bfa89f48f929961d04fa6c8.exe 97 PID 3996 wrote to memory of 1696 3996 5ce52f628bfa89f48f929961d04fa6c8.exe 97 PID 3996 wrote to memory of 1696 3996 5ce52f628bfa89f48f929961d04fa6c8.exe 97 PID 3996 wrote to memory of 1696 3996 5ce52f628bfa89f48f929961d04fa6c8.exe 97 PID 3996 wrote to memory of 1696 3996 5ce52f628bfa89f48f929961d04fa6c8.exe 97
Processes
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C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe"C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3688 -
C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe"C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4476 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\24687512-fddb-4022-8c85-a5cd2313b300" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2320
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C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe"C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3996 -
C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe"C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:1696
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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
MD5b7470a9aa569b259d4c2bb3b80ae3aa3
SHA1093290296b7f1e402ef96e4b33a88f064aa401eb
SHA256ee8aeed77dd9f1631fa75845214d75bfe04951a61892410ee369035e13fd14c6
SHA5124da3fc09260692f159c37b068664852931b712c8173de5e4b294799ac33ecf179055aaeb016fd0afad88cbfc50a571c4c88033dca56a573431af7462ea7979be
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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
MD53d8124d4f9906bd9e4252aab6fd5790f
SHA1334803f23b77c8b741c221c48e9188ca358ff14c
SHA2565afdc156f0549741d00d8ef4200851081e682336a1058e06a9deb627f669fb78
SHA5129c3f1903b1b815abf5ac7b3d8d5c984c6c6cdc4e3fce43b0c6d4ff8a725a553a0977d9a516ed743f3f222ceaaf67dbca8ecfeb700980e37b15da88ad0bc6b04b
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD505c9ce29ef34ddc3e63f5dc67120e130
SHA1edee1fc2c7a033a03dd810f3f9d8a62c2411014b
SHA256a23c5ba3aebd5f486f70d202f54e2506d508e492f177e2fe496f794ed1fa8e4d
SHA512654e76e2889f25c469f8ae1fb38d07a2fd0025072e1a8132a735bca4ba9d02fdef03e46df92132d767657225eba4467ecb74342eb188a45df138896fe6989377
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C:\Users\Admin\AppData\Local\24687512-fddb-4022-8c85-a5cd2313b300\5ce52f628bfa89f48f929961d04fa6c8.exe
Filesize369KB
MD5f6c60afc3994059536b8d00445177983
SHA15aaf7c2f63de2deebc23ca4282aaa25d608d3141
SHA256c6b321ebc936c13314c9a4b312fb58dd35797338bb7ef0d7b7b15ab682180ed2
SHA512345ffa7a918dd52038f0879e14b569cd002b3d230905c1a2748831a6808c27a2af8747a67ead82d7b8d02085397e3dbeed2bf0d2337f4bd87f3935f3f9c1cbab