PE_VIRUT.XO-1
Win32/Virut.H (AVG), W32/Virut.G (Fortinet), Virus.Win32.Virut (Ikarus), Virus.Win32.Virut.q (Kaspersky), Virus:Win32/Virut.L (Microsoft), W32/Virut.gen (McAfee), Win32/Virut.Q (Eset), W32.Virut.U (Symantec),
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Threat Type: File infector
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
This file infector infects by appending its code to target host files.
TECHNICAL DETAILS
145,168 bytes
EXE
Yes
08 Apr 2009
Installation
This file infector adds the following mutexes to ensure that only one of its copies runs at any one time:
- Vx_4
File Infection
This file infector infects the following file types:
- .EXE
- .SCR
It infects by appending its code to target host files.
It avoids infecting files that contain the following strings in their names:
- WINC
- WCUN
- WC32
- PSTO
Backdoor Routine
This file infector connects to any of the following IRC server(s):
- proxim.{BLOCKED}axy.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 expectant, standing: -
- Watching all day and night, for friends I wait:
- Where are you, friends?
- Come! It is time! It's late!
NOTES:
It hooks the following APIs so that when these APIs are called, the virus code is executed which then infects files:
- NtCreateFile
- NtCreateProcess
- NtCreateProcessEx
- NtOpenFile
It connects to the mentioned servers using 8-randomly generated character for its NICK. Once connected to the IRC server, it joins a certain channel to receive and execute commands on the affected system.
SOLUTION
9.700
5.883.00
08 Apr 2009
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.XO-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.
- 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.
- 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 delete files detected as PE_VIRUT.XO-1. 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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