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PE_VIRUT.XP-3

October 08, 2013
 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: File infector

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This file infector arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It may be dropped by other malware.

It infects files by overwriting code in the entry point and saving the overwritten code in the virus body. It then appends the virus body to the host file.

It connects to Internet Relay Chat (IRC) servers.

  TECHNICAL DETAILS

File Size:

Varies

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

08 Sep 2008

Arrival Details

This file infector arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

It may be dropped by other malware.

Installation

This file infector adds the following mutexes to ensure that only one of its copies runs at any one time:

  • VtSect

File Infection

This file infector infects the following file types:

  • .EXE
  • .SCR

It overwrites code found in the entry point of a target file. It then appends the virus body to the target file. The overwritten code is saved in the virus body.

It avoids infecting files that contain the following strings in their names:

  • PSTO
  • WC32
  • WCUN
  • WINC

Backdoor Routine

This file infector connects to any of the following Internet Relay Chat (IRC) servers:

  • proxim.ircgalazy.pl

Other Details

This file infector contains the following strings in its code:

  • O noon of life! O time to celebrate!
  • O summer garden!
  • Relentlessly happy and expectatnt, standing:
  • Watching all day and night, for friends I wait:
  • Where are you, friends? Come! It is time! It's late!

  SOLUTION

Minimum Scan Engine:

8.900

VSAPI PATTERN File:

05.530.07

VSAPI PATTERN Date:

08 Sep 2008

VSAPI PATTERN Date:

9/8/2008 12:00:00 AM

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

Identify and terminate files detected as PE_VIRUT.XP-3

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

Scan your computer with your Trend Micro product to clean files detected as PE_VIRUT.XP-3. 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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