WORM_BUBLIK.GY

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

Arrival Details

This worm 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 worm drops the following copies of itself into the affected system and executes them:

• %Application Data%\{random folder found}\{filename found in %System%}

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)

It drops the following files:

• {removable drive letter}:\{random folder name}\$REChCLE.BIN
• {removable drive letter}:\{random folder name}\thLmbs.db
• {removable drive letter}:\{random folder name}\vagefile.sys
• {removable drive letter}:\{random folder name}\desktopfini
• {removable drive letter}:\{random folder name}\readme.tat

Autostart Technique

This worm adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{random CLSID} = "%Application Data%\{random folder found}\{filename found in %System%}"

Other Details

This worm connects to the following possibly malicious URL:

• https://{BLOCKED}ections.cc/ping.html
• https://{BLOCKED}s.su/ping.html
• https://{BLOCKED}s.su/files/rar.exe
• https://{BLOCKED}s.su/files/vnc.dll
• https://{BLOCKED}.{BLOCKED}.88.87:8890/files/010-update-vl0d3/msg.gsm

NOTES:
It creates .LNK (shortcut) files using folder names found in removable drives. It then hides the original folder tricking users to click .LNK files. These .LNK files point out to a dropped copy of itself in the removable drive using a {random folder found in removable}\{random name}.{random extension}.