Analysis
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max time kernel
142s -
max time network
124s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
25-05-2024 11:11
Static task
static1
Behavioral task
behavioral1
Sample
781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
Resource
win11-20240508-en
General
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Target
781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
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Size
731KB
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MD5
2f9fa03e1f9537e0168926a86df09dd9
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SHA1
e7ee393bbce53e7ac207b59c6e432558a8f778a1
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SHA256
781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761
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SHA512
240c75b77ae15afe2277f0393e8fe191487cb8af4b54aadd8b90d464c21ab526e8be687074fa6ea6ed38d83def7a5e960b239ab2d280084129e95321b98cfa28
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SSDEEP
12288:n5sbAah9nr2pnjCrddbRUbXV7O5Bt2RAT2lIgAm/jhOkfNCScUQliFIL2:5sfh9nr0jCPEXNcBt2RbqfKIk17cUQsD
Malware Config
Extracted
djvu
http://cajgtus.com/test2/get.php
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extension
.vehu
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offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://cajgtus.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 15 IoCs
Processes:
resource yara_rule behavioral1/memory/2392-2-0x00000000049D0000-0x0000000004AEB000-memory.dmp family_djvu behavioral1/memory/3132-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3132-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3132-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3132-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3132-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4500-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4500-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4500-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4500-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4500-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4500-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4500-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4500-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4500-37-0x0000000000400000-0x0000000000537000-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.
Processes:
781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\512bb6ef-073f-4cc8-a305-a7a24b275522\\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe\" --AutoStart" 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.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.
Processes:
flow ioc 5 api.2ip.ua 6 api.2ip.ua 20 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exedescription pid process target process PID 2392 set thread context of 3132 2392 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 1336 set thread context of 4500 1336 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exepid process 3132 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 3132 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 4500 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 4500 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exedescription pid process target process PID 2392 wrote to memory of 3132 2392 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 2392 wrote to memory of 3132 2392 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 2392 wrote to memory of 3132 2392 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 2392 wrote to memory of 3132 2392 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 2392 wrote to memory of 3132 2392 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 2392 wrote to memory of 3132 2392 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 2392 wrote to memory of 3132 2392 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 2392 wrote to memory of 3132 2392 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 2392 wrote to memory of 3132 2392 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 2392 wrote to memory of 3132 2392 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 3132 wrote to memory of 4880 3132 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe icacls.exe PID 3132 wrote to memory of 4880 3132 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe icacls.exe PID 3132 wrote to memory of 4880 3132 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe icacls.exe PID 3132 wrote to memory of 1336 3132 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 3132 wrote to memory of 1336 3132 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 3132 wrote to memory of 1336 3132 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 1336 wrote to memory of 4500 1336 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 1336 wrote to memory of 4500 1336 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 1336 wrote to memory of 4500 1336 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 1336 wrote to memory of 4500 1336 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 1336 wrote to memory of 4500 1336 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 1336 wrote to memory of 4500 1336 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 1336 wrote to memory of 4500 1336 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 1336 wrote to memory of 4500 1336 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 1336 wrote to memory of 4500 1336 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe PID 1336 wrote to memory of 4500 1336 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe 781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe"C:\Users\Admin\AppData\Local\Temp\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe"C:\Users\Admin\AppData\Local\Temp\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\512bb6ef-073f-4cc8-a305-a7a24b275522" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe"C:\Users\Admin\AppData\Local\Temp\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe"C:\Users\Admin\AppData\Local\Temp\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EAFilesize
1KB
MD56f6e3fca3096a0e7e7eb59d51f4a5350
SHA1c978fa12d9045c593d5e7e097037ee465e09c3b2
SHA256d27a9ba9c11dbd9c2b2bcb61a4128f457e7d15a3db20fad170588821e4003d78
SHA512c45004cb6359a32eb55f1f2ff762ab948d79991ec890ceaf988d513ff9cd4dc0168deb2235b391b43ca8d69d960ba302fde0ed13a2b0e1dddbd63135f27cb546
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
724B
MD58202a1cd02e7d69597995cabbe881a12
SHA18858d9d934b7aa9330ee73de6c476acf19929ff6
SHA25658f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA51297ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EAFilesize
410B
MD550a3dde288cacfbc61ff50450556f240
SHA1b764ca3829f677700ba82ac1a4b778364a041ad7
SHA256b84558daf5dd7883f6b6f2fefa931505aca6c160e3282c48532314fa135a0cf7
SHA512c469c6b146f08dfad5547e8996fb144a77138957084cb14e049c195eec19642329dd9be50915aba43f9fa836508ee2a56ecd9bb6074cff0e8589ae105c6c47f0
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
392B
MD5a6a3c195b70be9b920f54fdf0743ea47
SHA166938d528390f5c12fbb71d62e1df82a8f12cfca
SHA2569dbf84c2b267f10673d931f14bb46055d78ae6f1f41eee3429c19356d667c79b
SHA5125e94fda5064fef46a97b9fb9d92b4700a6449c056c3fbc442347e5d01df1d7d1591221d01ff68f3b971c0d91df5395531675340cc992dc496270f7e3681ecdbb
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C:\Users\Admin\AppData\Local\512bb6ef-073f-4cc8-a305-a7a24b275522\781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761.exeFilesize
731KB
MD52f9fa03e1f9537e0168926a86df09dd9
SHA1e7ee393bbce53e7ac207b59c6e432558a8f778a1
SHA256781071eaa0af09e9572394aa486e87e7deef135a03daca19deb81fa311bc3761
SHA512240c75b77ae15afe2277f0393e8fe191487cb8af4b54aadd8b90d464c21ab526e8be687074fa6ea6ed38d83def7a5e960b239ab2d280084129e95321b98cfa28
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memory/2392-2-0x00000000049D0000-0x0000000004AEB000-memory.dmpFilesize
1.1MB
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memory/2392-1-0x0000000004920000-0x00000000049C1000-memory.dmpFilesize
644KB
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memory/3132-5-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3132-3-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3132-19-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3132-6-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3132-4-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4500-28-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4500-27-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4500-22-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4500-29-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4500-32-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4500-35-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4500-34-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4500-36-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4500-37-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB