Analysis
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max time kernel
297s -
max time network
303s -
platform
windows10-1703_x64 -
resource
win10-20231220-en -
resource tags
arch:x64arch:x86image:win10-20231220-enlocale:en-usos:windows10-1703-x64system -
submitted
15-01-2024 04:53
Static task
static1
Behavioral task
behavioral1
Sample
7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe
Resource
win10-20231220-en
General
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Target
7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe
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Size
823KB
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MD5
2ef95cac7a29f753ddd6722ad578638b
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SHA1
ae4b034b625e18192d3f1e4da6a06c56e9241848
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SHA256
7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668
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SHA512
08335b9087c9d642935db87223b9a7e6ada2ff9f7a3b4431e7a0200112d11dfe51e0fd0931694a98eba48ee881eefcee37c51bb83892a3b7f9e05b7b38f5d31c
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SSDEEP
12288:Bu4Z0Rr/foApQ8BpUlsVHZ/w6P/VAspkABjeBjWtsHVj9OQBNemak+W9lPJ:Bu4aRjfLzBpysPCqkGqjWt+pBema30x
Malware Config
Extracted
djvu
http://zexeq.com/test1/get.php
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extension
.cdwe
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offline_id
dSwr1XNNi5cIitB5eDPbMANcusB1dWGDB8ToUnt1
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payload_url
http://brusuax.com/dl/build2.exe
http://zexeq.com/files/1/build3.exe
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ransomnote
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Signatures
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Detect Vidar Stealer 5 IoCs
resource yara_rule behavioral2/memory/1800-44-0x00000000020C0000-0x000000000210B000-memory.dmp family_vidar_v6 behavioral2/memory/396-43-0x0000000000400000-0x000000000065E000-memory.dmp family_vidar_v6 behavioral2/memory/396-39-0x0000000000400000-0x000000000065E000-memory.dmp family_vidar_v6 behavioral2/memory/396-45-0x0000000000400000-0x000000000065E000-memory.dmp family_vidar_v6 behavioral2/memory/396-51-0x0000000000400000-0x000000000065E000-memory.dmp family_vidar_v6 -
Detected Djvu ransomware 16 IoCs
resource yara_rule behavioral2/memory/2684-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2684-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2684-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2684-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/316-2-0x0000000002300000-0x000000000241B000-memory.dmp family_djvu behavioral2/memory/2684-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2004-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2004-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2004-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2004-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2004-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2004-47-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2004-53-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2004-56-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2004-55-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2004-57-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Downloads MZ/PE file
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Executes dropped EXE 2 IoCs
pid Process 1800 build2.exe 396 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 1148 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3934047325-4097474570-3437169968-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\28ce7fef-f09c-4687-a619-5f0ca079d85e\\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe\" --AutoStart" 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.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 10 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 316 set thread context of 2684 316 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 74 PID 2860 set thread context of 2004 2860 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 78 PID 1800 set thread context of 396 1800 build2.exe 79 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 1 IoCs
pid pid_target Process procid_target 3708 396 WerFault.exe 79 -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 2684 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 2684 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 2004 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 2004 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe -
Suspicious use of WriteProcessMemory 39 IoCs
description pid Process procid_target PID 316 wrote to memory of 2684 316 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 74 PID 316 wrote to memory of 2684 316 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 74 PID 316 wrote to memory of 2684 316 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 74 PID 316 wrote to memory of 2684 316 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 74 PID 316 wrote to memory of 2684 316 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 74 PID 316 wrote to memory of 2684 316 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 74 PID 316 wrote to memory of 2684 316 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 74 PID 316 wrote to memory of 2684 316 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 74 PID 316 wrote to memory of 2684 316 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 74 PID 316 wrote to memory of 2684 316 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 74 PID 2684 wrote to memory of 1148 2684 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 75 PID 2684 wrote to memory of 1148 2684 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 75 PID 2684 wrote to memory of 1148 2684 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 75 PID 2684 wrote to memory of 2860 2684 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 76 PID 2684 wrote to memory of 2860 2684 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 76 PID 2684 wrote to memory of 2860 2684 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 76 PID 2860 wrote to memory of 2004 2860 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 78 PID 2860 wrote to memory of 2004 2860 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 78 PID 2860 wrote to memory of 2004 2860 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 78 PID 2860 wrote to memory of 2004 2860 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 78 PID 2860 wrote to memory of 2004 2860 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 78 PID 2860 wrote to memory of 2004 2860 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 78 PID 2860 wrote to memory of 2004 2860 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 78 PID 2860 wrote to memory of 2004 2860 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 78 PID 2860 wrote to memory of 2004 2860 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 78 PID 2860 wrote to memory of 2004 2860 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 78 PID 2004 wrote to memory of 1800 2004 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 80 PID 2004 wrote to memory of 1800 2004 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 80 PID 2004 wrote to memory of 1800 2004 7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe 80 PID 1800 wrote to memory of 396 1800 build2.exe 79 PID 1800 wrote to memory of 396 1800 build2.exe 79 PID 1800 wrote to memory of 396 1800 build2.exe 79 PID 1800 wrote to memory of 396 1800 build2.exe 79 PID 1800 wrote to memory of 396 1800 build2.exe 79 PID 1800 wrote to memory of 396 1800 build2.exe 79 PID 1800 wrote to memory of 396 1800 build2.exe 79 PID 1800 wrote to memory of 396 1800 build2.exe 79 PID 1800 wrote to memory of 396 1800 build2.exe 79 PID 1800 wrote to memory of 396 1800 build2.exe 79
Processes
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C:\Users\Admin\AppData\Local\Temp\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe"C:\Users\Admin\AppData\Local\Temp\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:316 -
C:\Users\Admin\AppData\Local\Temp\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe"C:\Users\Admin\AppData\Local\Temp\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2684 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\28ce7fef-f09c-4687-a619-5f0ca079d85e" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1148
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C:\Users\Admin\AppData\Local\Temp\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe"C:\Users\Admin\AppData\Local\Temp\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2860 -
C:\Users\Admin\AppData\Local\Temp\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe"C:\Users\Admin\AppData\Local\Temp\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2004 -
C:\Users\Admin\AppData\Local\28033bc3-ca92-4d97-8fbc-cf09c61d8d8c\build2.exe"C:\Users\Admin\AppData\Local\28033bc3-ca92-4d97-8fbc-cf09c61d8d8c\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1800
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C:\Users\Admin\AppData\Local\28033bc3-ca92-4d97-8fbc-cf09c61d8d8c\build2.exe"C:\Users\Admin\AppData\Local\28033bc3-ca92-4d97-8fbc-cf09c61d8d8c\build2.exe"1⤵
- Executes dropped EXE
PID:396 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 396 -s 19082⤵
- Program crash
PID:3708
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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
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
MD5feecae61d880321dbbd0d32522d4b852
SHA1ee78bf411a139889dc1a691c4277e0e3e3629f7e
SHA256c55c8a7bd3391a265396f6f8de0490ca8784803c259dfaccb8ecfa83fa04ad12
SHA512c94e488487cd21b32be4b964da8f53fb75e0f38df71b58b8f3b391d47d8337207ec8b51c94b9d7178677b48265200366c1db1456ddbe042a80377a6c555bc14a
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD53540b29390984ff8967c0eee238c907a
SHA165e1a15c73b1695308f73c154673cde04c201b23
SHA256a7d25b5295a544a47958707fde8445fbc8d47b3f5670bae304239bc37c9f8d47
SHA51232cd7ab111b1155398e9ad38f0b0c273106b38b2942900a1c94bb464d26f79607da798da3a8bf7535311288e776e9a362d7c8f4baab2cfcb828cfe5caf307841
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Filesize
122KB
MD5cac7c1e98cd83b5b9b08e6402801e543
SHA1c84fc44831b50e3177a7a6d5b96202a91c883b72
SHA256b405fcbef76f9b3dd0cd40889f9475a978bde4034087dd183f97c5ffd546d4e0
SHA51275cc29303a2fc0ae78fbad6120ba5cf18eae7af9d3e2b1e31e4a54e189eeb50b03c7e0b358b5b878cee769e5feeb585a7f6a4e00f1a204d58790f690cc19dc24
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Filesize
64KB
MD5a7f4a71c03997e5363d8851d071cf00a
SHA1881489c07963f9c62d05dec13b8e6b7abadc3a3c
SHA2566d3943fce8b3da19e36f379a9707a365c9c62c0c6fe706abbc3ff866a248f60b
SHA512f2a982d98ee350ca3b09841294ff9ee9bb3028d6b7bab230db94ef6143f766d2b6d18814e10565b16978405398e01fd232cc0d9e608f950dbc9ec1d398f66395
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Filesize
46KB
MD5ba897519cf035a5d589cd1cc43e88acd
SHA10d4320c3e59b679122fbf01ff09ad95ab0ee2d47
SHA256ebbe00c547df623096cbd2452fdad6345ebb45c4f2f894123dc830b4959861ee
SHA512fefeff649f0ef23ce3f2f0f93ca6b2e7a535936be3fdc2269e414c1d71032e1984ec556b9f2d28142603caef13f9c759405c16577511c2b25c4d579918c1ee94
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C:\Users\Admin\AppData\Local\28ce7fef-f09c-4687-a619-5f0ca079d85e\7cb2404fa999ff73f52f546d050cb2dac937b38d6a02849300b2825f13ccd668.exe
Filesize11KB
MD56628eb387c0fb4329dd464a2e690278a
SHA1fe2a0e08f60b241f8963217d08a985dca531f97c
SHA2567200c9ba76424154d3164e096234eb5a89e7f02635b8c019b4ca7beb09188bdf
SHA512ff0112d8805e328c161d7dc4156ffbb4417a8afbcce50b5f5df3fa10a11f33b821369bfdf636a3911358ea4fd60405bbff33f7d61fc795a2b96f97c0e9e55e00