ALIASES:

Virus:Win32/Virut.N (Microsoft); W32/Virut (McAfee); W32.Virut.W (Symantec); Virus.Win32.Virut.t (Kaspersky); Virus.Win32.Virut.t (v) (Sunbelt); Win32/Virut (AVG)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:

  • Threat Type: File infector

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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

  TECHNICAL DETAILS

File Size: 176,128 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 05 Jul 2013

Arrival Details

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

Other System Modifications

This file infector modifies the following registry entries:

HKEY_CURRENT_USER\Control Panel\Desktop\
WindowMetrics
Shell Icon Size = "48"

(Note: The default value data of the said registry entry is 32.)

HKEY_CURRENT_USER\Control Panel\Desktop\
WindowMetrics
Shell Icon Size = "64"

(Note: The default value data of the said registry entry is 32.)

HKEY_CURRENT_USER\Control Panel\Desktop\
WindowMetrics
Shell Icon Size = "32"

(Note: The default value data of the said registry entry is 32.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.300

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Control Panel\Desktop\WindowMetrics
    • From: Shell Icon Size = "48"
      To: Shell Icon Size = ""32""
  • In HKEY_CURRENT_USER\Control Panel\Desktop\WindowMetrics
    • From: Shell Icon Size = "64"
      To: Shell Icon Size = ""32""
  • In HKEY_CURRENT_USER\Control Panel\Desktop\WindowMetrics
    • From: Shell Icon Size = "32"
      To: Shell Icon Size = ""32""

Step 3

Scan your computer with your Trend Micro product to clean files detected as PE_VIRUT.ED. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


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