arrow_back
search
close

WORM_VBVRX.SMD

March 16, 2011
 ALIASES:

Worm:Win32/VB.FW (Microsoft), W32/Virut.n.gen (McAfee), Virus.Win32.Virut.ce (Kaspersky)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This worm arrives by connecting affected removable drives to a system. It may be dropped by other malware.

It modifies registry entries to enable its automatic execution at every system startup.

It drops copies of itself in all drives. These dropped copies use the names of the folders located on the said drives for their file names.

  TECHNICAL DETAILS

File Size:

Varies

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

01 Dec 2010

Arrival Details

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

It may be dropped by other malware.

Installation

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

  • %Windows%\winlogon.exe

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

Autostart Technique

This worm modifies the following registry entries to ensure it automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
Shell = "Explorer.exe %Windows%\winlogon.exe"

(Note: The default value data of the said registry entry is "Explorer.exe".)

File Infection

This is the Trend Micro detection for files infected by:

  • PE_VIRUX.S-1

Propagation

This worm drops the following copy of itself in all physical and removable drives:

  • {drive letter}:\winlogon.exe

It drops copies of itself in all drives. These dropped copies use the names of the folders located on the said drives for their file names.

  SOLUTION

Minimum Scan Engine:

8.900

NOTES:

Trend customers:

    Keep your pattern and scan engine files updated. Trend Micro antivirus software can clean or remove most types of computer threats. Malware, though, such as Trojans, scripts, overwriting viruses and joke programs which are identified as uncleanable, should simply be deleted.

All Internet users:

  • Use HouseCall - the Trend Micro online threat scanner to check for malware that may already be on your PC.
  • Catch malware/grayware before they affect your PC or network. Secure your Web world with Trend Micro products that offer the best anti-threat and content security solutions for home users, corporate users, and ISPs. Go here for more information on Trend Micro products that fit your needs.


Did this description help? Tell us how we did.