General
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Target
https://github.com/enginestein/Virus-Collection/blob/main/Windows/Binaries/Ransomware/Krotten.exe
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Sample
240619-srnhcaxcrp
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
https://github.com/enginestein/Virus-Collection/blob/main/Windows/Binaries/Ransomware/Krotten.exe
Resource
win10v2004-20240611-en
Malware Config
Extracted
F:\$RECYCLE.BIN\S-1-5-21-3665033694-1447845302-680750983-1000\JDBZRIXWF-MANUAL.txt
gandcrab
http://gandcrabmfe6mnef.onion/9afdf213bd7f960e
Extracted
C:\g6QpgrhJDdQZeF0\DECRYPT_YOUR_FILES.HTML
Extracted
C:\g6QpgrhJDdQZeF0\DECRYPT_YOUR_FILES.HTML
Extracted
C:\g6QpgrhJDdQZeF0\DECRYPT_YOUR_FILES.HTML
Targets
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Target
https://github.com/enginestein/Virus-Collection/blob/main/Windows/Binaries/Ransomware/Krotten.exe
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Renames multiple (1008) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Disables RegEdit via registry modification
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Disables Task Manager via registry modification
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Drops startup file
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Executes dropped EXE
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Adds Run key to start application
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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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Legitimate hosting services abused for malware hosting/C2
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Sets desktop wallpaper using registry
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