General
- Target https://github.com/theevilteam/KILLER-CLOWN-extracted/raw/main/3MB%20Online%20Install.exe
- Sample240520-nfmdpahb49
Malware Config
Targets
-
- Target https://github.com/theevilteam/KILLER-CLOWN-extracted/raw/main/3MB%20Online%20Install.exe
Score10/10Modifies WinLogon for persistence
UAC bypass
Deletes shadow copies
Ransomware often targets backup files to inhibit system recovery.
Downloads MZ/PE file
Drops file in Drivers directory
Modifies Installed Components in the registry
Drops startup file
Executes dropped EXE
Loads dropped DLL
Modifies system executable filetype association
Adds Run key to start application
Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
Legitimate hosting services abused for malware hosting/C2
Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
Drops file in System32 directory
Sets desktop wallpaper using registry
Suspicious use of SetThreadContext
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
3Registry Run Keys / Startup Folder
2Winlogon Helper DLL
1Event Triggered Execution
1Change Default File Association
1Pre-OS Boot
1Bootkit
1Scheduled Task/Job
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
3Registry Run Keys / Startup Folder
2Winlogon Helper DLL
1Event Triggered Execution
1Change Default File Association
1Scheduled Task/Job
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Impair Defenses
1Disable or Modify Tools
1Indicator Removal
1File Deletion
1Modify Registry
8Pre-OS Boot
1Bootkit
1