Analysis
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max time kernel
143s -
max time network
126s -
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, 09:50
Static task
static1
Behavioral task
behavioral1
Sample
a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral2
Sample
a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
Resource
win11-20240221-en
General
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Target
a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
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Size
771KB
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MD5
3a8a7c0a60f77b76feac5c6f736119b8
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SHA1
1966c2a7262aa4161958f168c4bc75dee4a291f4
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SHA256
a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f
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SHA512
3b29ffe7c556245f91838282a3667f097ff951936d3f3e054a3ae8d766c06605568f59c5020547e58523bf849ac5ac30f15d29363315c2c1b69a45953ac7d2d2
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SSDEEP
12288:ULaenOBDWTYc0uPoGKe6twNgOlj+eOnnkB35Xs5d6IdBuASBBhxlsz6A3SfpQO3:LIYpGh6twiu+eOnkq6HASrFsmA34OO3
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/3916-2-0x0000000004C90000-0x0000000004DAB000-memory.dmp family_djvu behavioral2/memory/404-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/404-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/404-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/404-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/404-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1032-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1032-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1032-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1032-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1032-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1032-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1032-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1032-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1032-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1032-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1032-39-0x0000000000400000-0x0000000000537000-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 2528 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\\19c5fb75-ae0c-41c6-a592-c1c7534e14d3\\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe\" --AutoStart" a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.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 7 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 3916 set thread context of 404 3916 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 77 PID 3444 set thread context of 1032 3444 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 82 -
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 404 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 404 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 1032 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 1032 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 3916 wrote to memory of 404 3916 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 77 PID 3916 wrote to memory of 404 3916 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 77 PID 3916 wrote to memory of 404 3916 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 77 PID 3916 wrote to memory of 404 3916 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 77 PID 3916 wrote to memory of 404 3916 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 77 PID 3916 wrote to memory of 404 3916 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 77 PID 3916 wrote to memory of 404 3916 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 77 PID 3916 wrote to memory of 404 3916 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 77 PID 3916 wrote to memory of 404 3916 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 77 PID 3916 wrote to memory of 404 3916 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 77 PID 404 wrote to memory of 2528 404 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 78 PID 404 wrote to memory of 2528 404 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 78 PID 404 wrote to memory of 2528 404 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 78 PID 404 wrote to memory of 3444 404 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 79 PID 404 wrote to memory of 3444 404 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 79 PID 404 wrote to memory of 3444 404 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 79 PID 3444 wrote to memory of 1032 3444 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 82 PID 3444 wrote to memory of 1032 3444 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 82 PID 3444 wrote to memory of 1032 3444 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 82 PID 3444 wrote to memory of 1032 3444 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 82 PID 3444 wrote to memory of 1032 3444 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 82 PID 3444 wrote to memory of 1032 3444 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 82 PID 3444 wrote to memory of 1032 3444 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 82 PID 3444 wrote to memory of 1032 3444 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 82 PID 3444 wrote to memory of 1032 3444 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 82 PID 3444 wrote to memory of 1032 3444 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe"C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3916 -
C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe"C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:404 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\19c5fb75-ae0c-41c6-a592-c1c7534e14d3" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2528
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C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe"C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3444 -
C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe"C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:1032
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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
MD5fc5408c48a55314c72e200b74330cac4
SHA17e8889ec3189a40e6078088927bf3612753fa628
SHA2567ea2a016d97635b1367455af2250cbf9e9c34d293829d11fc21ce905347590c4
SHA512481753ef755c188012919ea728ea0395f22b6ce83f2f9a11675be6072f154db141b2382dc62ad7c3c95e36596529176a66f40e3d118cf0e33ea8e6f716ae1d77
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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
MD56c4e4c1ba6120e79a921c78fc4420d98
SHA17393e3394deae984e1d0636e7a84c52eaa030709
SHA2567163eff14947a55ee70fd563d0451bac4ec1c4567f21e1ed0e963c8f0ea20732
SHA512cf7b2bf2105068f2ce12a5e25687aec782a14863d38e358b3d539a853cc89fde10775ddf37f9c8fa9bb5a4c4264432915d15b407c065e64fb6547a10b00e8dca
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5b2b7d1020b419952c9d3dad123ba2f15
SHA193b559545b242b05a97098d811ca77cb763f8449
SHA2562a8caa0fbce62e0a551202430295867e0d4ed58eddfcec534b5c2df5e3795222
SHA512abadee643b7927b4da58b71de90ce92968525a37a7d5c6f00c342672513a80bf9048cd636a5707c5ac271fd0efb5896065d155e56e00aafd86789ace7e0d3f94
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C:\Users\Admin\AppData\Local\19c5fb75-ae0c-41c6-a592-c1c7534e14d3\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
Filesize771KB
MD53a8a7c0a60f77b76feac5c6f736119b8
SHA11966c2a7262aa4161958f168c4bc75dee4a291f4
SHA256a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f
SHA5123b29ffe7c556245f91838282a3667f097ff951936d3f3e054a3ae8d766c06605568f59c5020547e58523bf849ac5ac30f15d29363315c2c1b69a45953ac7d2d2