Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-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 behavioral1/memory/1352-2-0x0000000004BF0000-0x0000000004D0B000-memory.dmp family_djvu behavioral1/memory/2244-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2244-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2244-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2244-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2244-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3148-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3148-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3148-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3148-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3148-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3148-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3148-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3148-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3148-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3148-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3148-39-0x0000000000400000-0x0000000000537000-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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 4876 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\622f7fcd-b718-4e50-bc6a-c98eee1b9528\\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 4 api.2ip.ua 5 api.2ip.ua 18 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 1352 set thread context of 2244 1352 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 85 PID 3628 set thread context of 3148 3628 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 93 -
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 2244 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 2244 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 3148 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 3148 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 1352 wrote to memory of 2244 1352 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 85 PID 1352 wrote to memory of 2244 1352 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 85 PID 1352 wrote to memory of 2244 1352 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 85 PID 1352 wrote to memory of 2244 1352 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 85 PID 1352 wrote to memory of 2244 1352 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 85 PID 1352 wrote to memory of 2244 1352 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 85 PID 1352 wrote to memory of 2244 1352 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 85 PID 1352 wrote to memory of 2244 1352 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 85 PID 1352 wrote to memory of 2244 1352 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 85 PID 1352 wrote to memory of 2244 1352 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 85 PID 2244 wrote to memory of 4876 2244 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 89 PID 2244 wrote to memory of 4876 2244 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 89 PID 2244 wrote to memory of 4876 2244 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 89 PID 2244 wrote to memory of 3628 2244 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 90 PID 2244 wrote to memory of 3628 2244 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 90 PID 2244 wrote to memory of 3628 2244 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 90 PID 3628 wrote to memory of 3148 3628 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 93 PID 3628 wrote to memory of 3148 3628 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 93 PID 3628 wrote to memory of 3148 3628 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 93 PID 3628 wrote to memory of 3148 3628 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 93 PID 3628 wrote to memory of 3148 3628 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 93 PID 3628 wrote to memory of 3148 3628 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 93 PID 3628 wrote to memory of 3148 3628 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 93 PID 3628 wrote to memory of 3148 3628 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 93 PID 3628 wrote to memory of 3148 3628 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 93 PID 3628 wrote to memory of 3148 3628 a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe 93
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:1352 -
C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe"C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2244 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\622f7fcd-b718-4e50-bc6a-c98eee1b9528" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4876
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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:3628 -
C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe"C:\Users\Admin\AppData\Local\Temp\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3148
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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
MD5a791dc660eb1a20532715092eec9e1a2
SHA10d5e484ddf9c2d25e8c856d8447a9adcf113300b
SHA25663ad6f14dedb9e1d22bc2a5bff7af908b9ada094d211559d596ac7395dbc0f6d
SHA5126c2929b0dd28dd4fe4887df2ac95968deca1cdd91a1002ee1fcc99073f34460c16ff187e4b3f9ecd827d8cc1ea7543d6fa46944130c2c8681d88213d17574c13
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5edeaeee2db8bf0c849c0de68474259e4
SHA1eb132a6b4a11481c50491978795fe9821f2ef966
SHA256c90d48e9112a020d890e99083fdbb3b4dba2d79af2684fc7d032549b2a25731e
SHA512d04f79278105cf40f350f7b7b70c2cacf710dcdc3f3d73c5105ac6e6249508db136d675371718729996c144fa7577d38b6197e5a5779919e72c71ff53e4ee3b2
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C:\Users\Admin\AppData\Local\622f7fcd-b718-4e50-bc6a-c98eee1b9528\a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f.exe
Filesize771KB
MD53a8a7c0a60f77b76feac5c6f736119b8
SHA11966c2a7262aa4161958f168c4bc75dee4a291f4
SHA256a9bc848466303ba203b2d8648ba71bc9e15115fbcaf723b0e47f47f91585e33f
SHA5123b29ffe7c556245f91838282a3667f097ff951936d3f3e054a3ae8d766c06605568f59c5020547e58523bf849ac5ac30f15d29363315c2c1b69a45953ac7d2d2