Analysis
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max time kernel
143s -
max time network
123s -
platform
windows11-21h2_x64 -
resource
win11-20240221-en -
resource tags
arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system -
submitted
09/04/2024, 05:47
Static task
static1
Behavioral task
behavioral1
Sample
f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral2
Sample
f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe
Resource
win11-20240221-en
General
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Target
f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe
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Size
771KB
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MD5
1be477c579869b30cd8f9ec09e2611b3
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SHA1
897d59324c868c1d194dd0107212d119b15aa76a
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SHA256
f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56
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SHA512
23236d3b8f3452155496e9097aad21c9b9f9c06a1379a1cb819445d265b21a1cb2f859f5672c6e3e57e7ac7fef6b0ab25271e47202582b2f3c43a39d27e6c4df
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SSDEEP
12288:r+c8FbuiWKbuolBBIxEon4AdBCYg1CONb/2k04NrQwLJw9JM1y4V7vlci7i:sWKbLBoEon4AuCOti7SJOCy4dvlde
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/800-2-0x0000000004CC0000-0x0000000004DDB000-memory.dmp family_djvu behavioral2/memory/4252-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4252-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4252-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4252-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4252-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2712-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2712-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2712-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2712-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2712-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2712-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2712-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2712-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2712-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2712-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2712-39-0x0000000000400000-0x0000000000537000-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 1492 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-4181651180-3163410697-3990547336-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4ee7e203-58d4-411e-9b85-aad544db5358\\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe\" --AutoStart" f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.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 7 api.2ip.ua 1 api.2ip.ua 2 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 800 set thread context of 4252 800 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 78 PID 3480 set thread context of 2712 3480 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 83 -
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 4252 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 4252 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 2712 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 2712 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 800 wrote to memory of 4252 800 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 78 PID 800 wrote to memory of 4252 800 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 78 PID 800 wrote to memory of 4252 800 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 78 PID 800 wrote to memory of 4252 800 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 78 PID 800 wrote to memory of 4252 800 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 78 PID 800 wrote to memory of 4252 800 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 78 PID 800 wrote to memory of 4252 800 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 78 PID 800 wrote to memory of 4252 800 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 78 PID 800 wrote to memory of 4252 800 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 78 PID 800 wrote to memory of 4252 800 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 78 PID 4252 wrote to memory of 1492 4252 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 79 PID 4252 wrote to memory of 1492 4252 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 79 PID 4252 wrote to memory of 1492 4252 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 79 PID 4252 wrote to memory of 3480 4252 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 80 PID 4252 wrote to memory of 3480 4252 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 80 PID 4252 wrote to memory of 3480 4252 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 80 PID 3480 wrote to memory of 2712 3480 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 83 PID 3480 wrote to memory of 2712 3480 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 83 PID 3480 wrote to memory of 2712 3480 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 83 PID 3480 wrote to memory of 2712 3480 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 83 PID 3480 wrote to memory of 2712 3480 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 83 PID 3480 wrote to memory of 2712 3480 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 83 PID 3480 wrote to memory of 2712 3480 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 83 PID 3480 wrote to memory of 2712 3480 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 83 PID 3480 wrote to memory of 2712 3480 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 83 PID 3480 wrote to memory of 2712 3480 f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe"C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:800 -
C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe"C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4252 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\4ee7e203-58d4-411e-9b85-aad544db5358" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1492
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C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe"C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3480 -
C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe"C:\Users\Admin\AppData\Local\Temp\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2712
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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
MD5580071ebd24cccfd9268e1474bb8134e
SHA1443665efe7009fe1d4c5bc4786dc9cc540e59ef6
SHA25653e3fd53196b53d23b724612cf2704518edf3e979dca02f5674ac419b5f7b461
SHA51213d52455d8a30a0af06c420cd01f13f55efc4c55b59883c5208bf4929352e7b783557bff6a157c4fc71a8e7cbfadf00d55eef8ebef4b984624d8feb116a960a4
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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
MD5ae205a1749bdb7b70656d9abeebe7952
SHA17cb36d8093083a4926dffcee8d48f0e15e4336a9
SHA25628ec58d780a3eb481bb0bb08b8f6590e65c42221ff365ca10e087f1fd88e5813
SHA5123a85e4468bc7c9b8992cb9d555ea58bbf5d041653e3ca0dd489261c4ac0b6c437a7438a47871fe20c6dab6d6f5088b558677de38f4f4d571384b2becdbc88e8b
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD50c35495e9b6093a61964e508204036fd
SHA1d80f999f6854b291112fd23b124ac87aedc84004
SHA256de425888e45e9ef9291093533a06b69d9aec7405b7cb8e0a6a91a2cf9800f664
SHA51297fb05f3420dc026f0d96f2753ea389670e5097050b7f1b96b17c71915462f3210671baa9c968c0c961127031e331b30ed85fb24d8bfd745d903ac17c1606e30
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C:\Users\Admin\AppData\Local\4ee7e203-58d4-411e-9b85-aad544db5358\f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56.exe
Filesize771KB
MD51be477c579869b30cd8f9ec09e2611b3
SHA1897d59324c868c1d194dd0107212d119b15aa76a
SHA256f585d7f7bf9e7a6e5ef8ef61f42b7eeabb44a5ca37292781116392b795774f56
SHA51223236d3b8f3452155496e9097aad21c9b9f9c06a1379a1cb819445d265b21a1cb2f859f5672c6e3e57e7ac7fef6b0ab25271e47202582b2f3c43a39d27e6c4df