Analysis by: Roland Marco Dela Paz
ALIASES:

Win32/AutoRun.FlyStudio.ZE (NOD32); W32.SillyFDC (Symantec)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This worm arrives by connecting affected removable drives to a system. It arrives by accessing affected shared networks.

  TECHNICAL DETAILS

File Size: 815,214 bytes
File Type: EXE
Initial Samples Received Date: 01 Jun 2012

Arrival Details

This worm arrives by connecting affected removable drives to a system.

It arrives by accessing affected shared networks.

Installation

This worm drops the following files:

  • %System Root%\autorun.inf\desktop.ini
  • %Program Files%\autorun.inf\desktop.ini
  • %Program Files%\Windows Media Player\autorun.inf\desktop.ini
  • %User Temp%\E_N4\eAPI.fne
  • %User Temp%\E_N4\internet.fne
  • %User Temp%\E_N4\krnln.fnr
  • %User Temp%\E_N4\Md5.fne

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %Program Files% is the default Program Files folder, usually C:\Program Files.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

It drops the following copies of itself into the affected system:

  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6\6\e\7\d\f\f\9\f\9\8\7\6\4\d\a\autorun.inf\svchost.exe¡¡

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)

It creates the following folders:

  • %System Root%\autorun.inf
  • %System Root%\autorun.inf\ÎļþÃâÒß.
  • %Program Files%\autorun.inf
  • %Program Files%\autorun.inf\ÎļþÃâÒß.
  • %Program Files%\Windows Media Player\autorun.inf
  • %Program Files%\Windows Media Player\autorun.inf\ÎļþÃâÒß.
  • %User Temp%\E_N4
  • %Program Files%\Windows Media Player\c\f
  • %Program Files%\Windows Media Player\c\f\c
  • %Program Files%\Windows Media Player\c\f\c\d
  • %Program Files%\Windows Media Player\c\f\c\d\2
  • %Program Files%\Windows Media Player\c\f\c\d\2\0
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6\6
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6\6\e
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6\6\e\7
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6\6\e\7\d
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6\6\e\7\d\f
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6\6\e\7\d\f\f
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6\6\e\7\d\f\f\9
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6\6\e\7\d\f\f\9\f
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6\6\e\7\d\f\f\9\f\9
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6\6\e\7\d\f\f\9\f\9\8
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6\6\e\7\d\f\f\9\f\9\8\7
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6\6\e\7\d\f\f\9\f\9\8\7\6
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6\6\e\7\d\f\f\9\f\9\8\7\6\4
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6\6\e\7\d\f\f\9\f\9\8\7\6\4\d
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6\6\e\7\d\f\f\9\f\9\8\7\6\4\d\a
  • %Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6\6\e\7\d\f\f\9\f\9\8\7\6\4\d\a\autorun.inf

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %Program Files% is the default Program Files folder, usually C:\Program Files.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

Autostart Technique

This worm modifies the following registry entry(ies) to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
Userinit = Userinit,"%Program Files%\Windows Media Player\c\f\c\d\2\0\8\4\9\5\d\5\6\5\e\f\6\6\e\7\d\f\f\9\f\9\8\7\6\4\d\a\autorun.inf\svchost.exe¡¡

(Note: The default value data of the said registry entry is C:\WINDOWS\system32\userinit.exe,.)

Other System Modifications

This worm adds the following registry keys:

HKEY_CLASSES_ROOT\.exe¡¡

HKEY_CURRENT_USER\Software\LoveQ

Propagation

This worm searches for folders in all physical and removable drives then drops copies of itself inside the folder as {folder name}.EXE.

It uses the following file names for the copies it drops into shared networks:

  • ...exe
  • ..exe