Analysis
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max time kernel
144s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-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 14 IoCs
resource yara_rule behavioral1/memory/1200-2-0x00000000045B0000-0x00000000046CB000-memory.dmp family_djvu behavioral1/memory/2676-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2676-8-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2676-9-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2676-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2660-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2660-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2660-49-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2660-50-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2660-51-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2660-55-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2660-58-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2660-57-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2660-59-0x0000000000400000-0x0000000000537000-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 2972 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-452311807-3713411997-1028535425-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c5894b6b-31bc-4ec5-8c2a-cbbe9285969e\\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 3 api.2ip.ua 4 api.2ip.ua 9 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 1200 set thread context of 2676 1200 5ce52f628bfa89f48f929961d04fa6c8.exe 28 PID 2880 set thread context of 2660 2880 5ce52f628bfa89f48f929961d04fa6c8.exe 31 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 3 IoCs
pid Process 2676 5ce52f628bfa89f48f929961d04fa6c8.exe 2660 5ce52f628bfa89f48f929961d04fa6c8.exe 2660 5ce52f628bfa89f48f929961d04fa6c8.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 1200 wrote to memory of 2676 1200 5ce52f628bfa89f48f929961d04fa6c8.exe 28 PID 1200 wrote to memory of 2676 1200 5ce52f628bfa89f48f929961d04fa6c8.exe 28 PID 1200 wrote to memory of 2676 1200 5ce52f628bfa89f48f929961d04fa6c8.exe 28 PID 1200 wrote to memory of 2676 1200 5ce52f628bfa89f48f929961d04fa6c8.exe 28 PID 1200 wrote to memory of 2676 1200 5ce52f628bfa89f48f929961d04fa6c8.exe 28 PID 1200 wrote to memory of 2676 1200 5ce52f628bfa89f48f929961d04fa6c8.exe 28 PID 1200 wrote to memory of 2676 1200 5ce52f628bfa89f48f929961d04fa6c8.exe 28 PID 1200 wrote to memory of 2676 1200 5ce52f628bfa89f48f929961d04fa6c8.exe 28 PID 1200 wrote to memory of 2676 1200 5ce52f628bfa89f48f929961d04fa6c8.exe 28 PID 1200 wrote to memory of 2676 1200 5ce52f628bfa89f48f929961d04fa6c8.exe 28 PID 1200 wrote to memory of 2676 1200 5ce52f628bfa89f48f929961d04fa6c8.exe 28 PID 2676 wrote to memory of 2972 2676 5ce52f628bfa89f48f929961d04fa6c8.exe 29 PID 2676 wrote to memory of 2972 2676 5ce52f628bfa89f48f929961d04fa6c8.exe 29 PID 2676 wrote to memory of 2972 2676 5ce52f628bfa89f48f929961d04fa6c8.exe 29 PID 2676 wrote to memory of 2972 2676 5ce52f628bfa89f48f929961d04fa6c8.exe 29 PID 2676 wrote to memory of 2880 2676 5ce52f628bfa89f48f929961d04fa6c8.exe 30 PID 2676 wrote to memory of 2880 2676 5ce52f628bfa89f48f929961d04fa6c8.exe 30 PID 2676 wrote to memory of 2880 2676 5ce52f628bfa89f48f929961d04fa6c8.exe 30 PID 2676 wrote to memory of 2880 2676 5ce52f628bfa89f48f929961d04fa6c8.exe 30 PID 2880 wrote to memory of 2660 2880 5ce52f628bfa89f48f929961d04fa6c8.exe 31 PID 2880 wrote to memory of 2660 2880 5ce52f628bfa89f48f929961d04fa6c8.exe 31 PID 2880 wrote to memory of 2660 2880 5ce52f628bfa89f48f929961d04fa6c8.exe 31 PID 2880 wrote to memory of 2660 2880 5ce52f628bfa89f48f929961d04fa6c8.exe 31 PID 2880 wrote to memory of 2660 2880 5ce52f628bfa89f48f929961d04fa6c8.exe 31 PID 2880 wrote to memory of 2660 2880 5ce52f628bfa89f48f929961d04fa6c8.exe 31 PID 2880 wrote to memory of 2660 2880 5ce52f628bfa89f48f929961d04fa6c8.exe 31 PID 2880 wrote to memory of 2660 2880 5ce52f628bfa89f48f929961d04fa6c8.exe 31 PID 2880 wrote to memory of 2660 2880 5ce52f628bfa89f48f929961d04fa6c8.exe 31 PID 2880 wrote to memory of 2660 2880 5ce52f628bfa89f48f929961d04fa6c8.exe 31 PID 2880 wrote to memory of 2660 2880 5ce52f628bfa89f48f929961d04fa6c8.exe 31
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:1200 -
C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe"C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2676 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\c5894b6b-31bc-4ec5-8c2a-cbbe9285969e" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2972
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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:2880 -
C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe"C:\Users\Admin\AppData\Local\Temp\5ce52f628bfa89f48f929961d04fa6c8.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2660
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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
MD5d1622115f5a796a6c720b52a989f76e9
SHA1810749d76c93ce8d53387c9efba28d888f952478
SHA2560db8d6bdd592d4b1fce3fe454e1bf33596408dcf31b0a3d201add22b5ef2b96e
SHA5128e5fe2b776d1b161c6cfffdda6cd5bf305be93698c2ea8b7e1b24b3008630f80b80053c41acab516974eca49f7f93e4116fb8c75d745f891bfb41197de28bf18
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize344B
MD54b499f67a343129c67c624d17da57982
SHA173db3745065aeda8fb3c5fbfb9491cfb3b206742
SHA25634f126524ed7efe601693084bbd66c60bae18e114c70272ce918820ac2f909ed
SHA5123a05ba9d8e74753c8419aaff0e9d4c942e3d85c172ceb0864992d1da54ddf464ea6016a2a23cef86e53e22c3ffe589998aeb43755b8494c8d0e6da12bba21ea8
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5a4c3205e8f9686544632a3d681b0b437
SHA15b4172c19644e4d3f444e48cd8617ab9521df102
SHA256a13d4bde73db23d7dee8363683fb01a64dab9eeaa348c4f7159dbc2314d33d03
SHA5121ebd6646830a591d256c3cb85d7600608f6c6639fd201b1ea828b85b0f1397024f269eaa037eb1e121949291cc410b30fe35aebd4dd83f0b1001f2cac732cb27
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Filesize
65KB
MD5ac05d27423a85adc1622c714f2cb6184
SHA1b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA5126d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d
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C:\Users\Admin\AppData\Local\c5894b6b-31bc-4ec5-8c2a-cbbe9285969e\5ce52f628bfa89f48f929961d04fa6c8.exe
Filesize730KB
MD55ce52f628bfa89f48f929961d04fa6c8
SHA1aa9c7a0e0721b6cc8a44ef28bd3b23328d8bcb7a
SHA2567912d5bd90e1c9427ef14e571589aab9017c823c16849976b6d2fc483fe34d10
SHA512a89eef90f56c652b7821d52b1695cf965cd56bf342f6747ac8bcc75a034f8a137e3ce6c37ed0a0e8ef76a7f26a8dfbab94ada5329836bd8c80a0a57873ab812c