Ransom.Win32.RTMCOMMAND.THKBFBB

This Ransomware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It drops files as ransom note.

Arrival Details

This Ransomware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Ransomware adds the following processes:

• %System%\cmd.exe" /c PING -n 5 127.0.0.1 > NUL && del "{Malware Full Path}" → deletes itself

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Other System Modifications

This Ransomware changes the desktop wallpaper by modifying the following registry entries:

HKEY_CURRENT_USER\Control Panel\Desktop
Wallpaper = "%User Temp%"\img{3 Random Characters}.tmp

Process Termination

This Ransomware terminates the following processes if found running in the affected system's memory:

• sql.exe
• oracle.exe
• ocssd.exe
• dbsnmp.exe
• synctime.exe
• agntsvc.exe
• isqlplussvc.exe
• xfssvccon.exe
• mydesktopservice.exe
• ocautoupds.exe
• encsvc.exe
• firefox.exe
• tbirdconfig.exe
• mydesktopqos.exe
• ocomm.exe
• dbeng50.exe
• sqbcoreservice.exe
• excel.exe
• infopath.exe
• msaccess.exe
• mspub.exe
• onenote.exe
• outlook.exe
• powerpnt.exe
• steam.exe
• thebat.exe
• thunderbird.exe
• visio.exe
• winword.exe
• wordpad.exe
• notepad.exe

Information Theft

This Ransomware accepts the following parameters:

• -debug - Display debug info

Other Details

This Ransomware does the following:

• It uses WQL to delete shadow copies.
• It encrypts network drives.
• It empties recycle bin
• If not executed with admins rights, it will relaunch itself as admin using this command:
  • %System%\cmd.exe" /c ECHO "You must restart the program to resolve a critical error" && start "" {Malware Full Path}

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Ransomware Routine

This Ransomware avoids encrypting files found in the following folders:

• windows
• appdata
• application data
• boot
• google
• mozilla
• program files
• program files (x86)
• programdata
• system volume information
• tor browser
• windows.old
• intel
• msocache
• perflogs
• x64dbg
• public
• all users
• default

It appends the following extension to the file name of the encrypted files:

• .{64 Random Characters}

It drops the following file(s) as ransom note:

• "%User Temp%"\img{3 Random Characters}.tmp
  
• {Encrypted directory}\How To Restore Your Files.txt