General
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Target
https://github.com/theevilteam/KILLER-CLOWN-extracted/raw/main/3MB%20Online%20Install.exe
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Sample
240522-nh59ksch35
Score
10/10
Malware Config
Targets
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Target
https://github.com/theevilteam/KILLER-CLOWN-extracted/raw/main/3MB%20Online%20Install.exe
Score10/10-
Modifies WinLogon for persistence
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UAC bypass
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Deletes shadow copies
Ransomware often targets backup files to inhibit system recovery.
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Downloads MZ/PE file
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Drops file in Drivers directory
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Modifies Installed Components in the registry
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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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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Modifies system executable filetype association
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Registers COM server for autorun
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Legitimate hosting services abused for malware hosting/C2
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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 Matrix ATT&CK v13
Persistence
Boot or Logon Autostart Execution
3Registry Run Keys / Startup Folder
2Winlogon Helper DLL
1Event Triggered Execution
1Change Default File Association
1Privilege Escalation
Boot or Logon Autostart Execution
3Registry Run Keys / Startup Folder
2Winlogon Helper DLL
1Abuse Elevation Control Mechanism
1Bypass User Account Control
1Event Triggered Execution
1Change Default File Association
1