General
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Target
https://gitea.com/ImMoonDev/pysilon-upload
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Sample
250228-xkl36atya1
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
https://gitea.com/ImMoonDev/pysilon-upload
Resource
win10ltsc2021-20250217-de
Malware Config
Targets
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Target
https://gitea.com/ImMoonDev/pysilon-upload
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BadRabbit
Ransomware family discovered in late 2017, mainly targeting Russia and Ukraine.
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Badrabbit family
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Dharma
Dharma is a ransomware that uses security software installation to hide malicious activities.
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Dharma family
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Deletes shadow copies
Ransomware often targets backup files to inhibit system recovery.
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Enumerates VirtualBox DLL files
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Renames multiple (676) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Command and Scripting Interpreter: PowerShell
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
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Disables Task Manager via registry modification
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Credentials from Password Stores: Windows Credential Manager
Suspicious access to Credentials History.
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Drops startup file
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Executes dropped EXE
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Loads dropped DLL
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Adds Run key to start application
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Drops desktop.ini file(s)
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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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Modifies WinLogon
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Drops file in System32 directory
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Sets desktop wallpaper using registry
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MITRE ATT&CK Enterprise v15
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1Windows Management Instrumentation
1Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Direct Volume Access
1Hide Artifacts
2Hidden Files and Directories
2Indicator Removal
2File Deletion
2Modify Registry
3Virtualization/Sandbox Evasion
1Credential Access
Credentials from Password Stores
2Credentials from Web Browsers
1Windows Credential Manager
1Unsecured Credentials
1Credentials In Files
1