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Analysis
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max time kernel
141s -
max time network
167s -
platform
windows11-21h2_x64 -
resource
win11-20240221-en -
resource tags
arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system -
submitted
06/04/2024, 21:39
Static task
static1
Behavioral task
behavioral1
Sample
ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral2
Sample
ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe
Resource
win11-20240221-en
General
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Target
ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe
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Size
745KB
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MD5
03813c0d02b548f6d16a09dc6220e157
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SHA1
03666fedc343f1ea458f1d8c7e0ffad796e90788
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SHA256
ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe
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SHA512
c856f9dd525c98a5200f3ef7201dd1566306a7c33b7ca9988e91f2d12694bc3fac761f24096b9a0044ba9c9044d4b8f7feef967b9395cfee71b1e0d9fd50aa70
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SSDEEP
12288:6dgX02mhTllwTf0YCzdBXdoGSMEihOpT5dXRwSJmu9A5KJ8h23+BvY3mNgVhLlM4:6dG+Tllyf0YCV4i2dBwUjx6AmNgVhaBi
Malware Config
Extracted
djvu
http://sajdfue.com/test2/get.php
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extension
.uazq
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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 9 IoCs
resource yara_rule behavioral2/memory/4048-2-0x0000000004BD0000-0x0000000004CEB000-memory.dmp family_djvu behavioral2/memory/4920-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4920-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4920-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4920-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4920-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1488-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1488-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1488-25-0x0000000000400000-0x0000000000537000-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 3136 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3852399462-405385529-394778097-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\934fff50-f4f1-444a-bd95-5db3e4038b00\\ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe\" --AutoStart" ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe -
Looks up external IP address via web service 2 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 -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 4048 set thread context of 4920 4048 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 80 PID 2252 set thread context of 1488 2252 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 85 -
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 4924 1488 WerFault.exe 85 -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 4920 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 4920 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 4048 wrote to memory of 4920 4048 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 80 PID 4048 wrote to memory of 4920 4048 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 80 PID 4048 wrote to memory of 4920 4048 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 80 PID 4048 wrote to memory of 4920 4048 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 80 PID 4048 wrote to memory of 4920 4048 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 80 PID 4048 wrote to memory of 4920 4048 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 80 PID 4048 wrote to memory of 4920 4048 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 80 PID 4048 wrote to memory of 4920 4048 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 80 PID 4048 wrote to memory of 4920 4048 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 80 PID 4048 wrote to memory of 4920 4048 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 80 PID 4920 wrote to memory of 3136 4920 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 81 PID 4920 wrote to memory of 3136 4920 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 81 PID 4920 wrote to memory of 3136 4920 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 81 PID 4920 wrote to memory of 2252 4920 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 82 PID 4920 wrote to memory of 2252 4920 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 82 PID 4920 wrote to memory of 2252 4920 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 82 PID 2252 wrote to memory of 1488 2252 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 85 PID 2252 wrote to memory of 1488 2252 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 85 PID 2252 wrote to memory of 1488 2252 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 85 PID 2252 wrote to memory of 1488 2252 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 85 PID 2252 wrote to memory of 1488 2252 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 85 PID 2252 wrote to memory of 1488 2252 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 85 PID 2252 wrote to memory of 1488 2252 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 85 PID 2252 wrote to memory of 1488 2252 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 85 PID 2252 wrote to memory of 1488 2252 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 85 PID 2252 wrote to memory of 1488 2252 ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe"C:\Users\Admin\AppData\Local\Temp\ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4048 -
C:\Users\Admin\AppData\Local\Temp\ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe"C:\Users\Admin\AppData\Local\Temp\ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4920 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\934fff50-f4f1-444a-bd95-5db3e4038b00" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3136
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C:\Users\Admin\AppData\Local\Temp\ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe"C:\Users\Admin\AppData\Local\Temp\ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2252 -
C:\Users\Admin\AppData\Local\Temp\ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe"C:\Users\Admin\AppData\Local\Temp\ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe" --Admin IsNotAutoStart IsNotTask4⤵PID:1488
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1488 -s 6005⤵
- Program crash
PID:4924
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1488 -ip 14881⤵PID:2392
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\934fff50-f4f1-444a-bd95-5db3e4038b00\ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe.exe
Filesize745KB
MD503813c0d02b548f6d16a09dc6220e157
SHA103666fedc343f1ea458f1d8c7e0ffad796e90788
SHA256ecd4ed3aeeb6604487a212f72c127f36cdb8825e63aebef8dd9e927f165e2cbe
SHA512c856f9dd525c98a5200f3ef7201dd1566306a7c33b7ca9988e91f2d12694bc3fac761f24096b9a0044ba9c9044d4b8f7feef967b9395cfee71b1e0d9fd50aa70