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You have been re-routed to the Trojan:Win32/Vundo.QA write up because Trojan%3aWin32%2fVundo.QA has been renamed to Trojan:Win32/Vundo.QA
 

Trojan:Win32/Vundo.QA


Trojan:Win32/Vundo.QA is a member of Win32/Vundo - a multiple component family of programs that deliver 'out of context' pop-up advertisements. They may also download and execute arbitrary files. Vundo is often distributed as a DLL file and installed on an affected computer as a Browser Helper Object (BHO) without a user's consent. This family uses advanced defensive and stealth techniques to escape detection and to hinder removal.


What to do now

To detect and remove this threat and other malicious software that may have been installed in your computer, run a full-system scan with an up-to-date antivirus product such as the following: For more information about using antivirus software, see http://www.microsoft.com/windows/antivirus-partners/.

Threat behavior

Trojan:Win32/Vundo.QA is a member of Win32/Vundo - a multiple component family of programs that deliver 'out of context' pop-up advertisements. They may also download and execute arbitrary files. Vundo is often distributed as a DLL file and installed on an affected computer as a Browser Helper Object (BHO) without a user's consent. This family uses advanced defensive and stealth techniques to escape detection and to hinder removal.
Installation
When executed, Trojan:Win32/Vundo.QA copies itself to c:\documents and settings\administrator\application data\netprotocol.exe.

The malware modifies the following registry entries to ensure that its copy executes at each Windows start:

Adds value: "Netprotocol"
With data: "c:\documents and settings\administrator\application data\netprotocol.exe"
To subkey: HKCU\Software\Microsoft\windows\currentversion\run

The malware creates the following files on an affected computer:

  • c:\documents and settings\administrator\application data\system.log
Payload
Contacts remote hosts
Trojan:Win32/Vundo.QA may contact the following remote hosts using port 80:

  • adrave.be
  • cyteam.be
  • eksyghskgsbakrys.com
  • msrgejsdyvekadh.com

Commonly, malware may contact a remote host for the following purposes:
  • To confirm Internet connectivity
  • To report a new infection to its author
  • To receive configuration or other data
  • To download and execute arbitrary files (including updates or additional malware)
  • To receive instruction from a remote attacker
  • To upload data taken from the affected computer

This malware description was produced and published using our automated analysis system's examination of file SHA1 5aa47d1a3413c1f20c14dca92d78a4176b94a85f.

Symptoms

System changes
The following system changes may indicate the presence of this malware:

  • The presence of the following files:

  • c:\documents and settings\administrator\application data\netprotocol.exe
    c:\documents and settings\administrator\application data\system.log

  • The presence of the following registry modifications:
  • Adds value: "Netprotocol"
    With data: "c:\documents and settings\administrator\application data\netprotocol.exe"
    To subkey: HKCU\Software\Microsoft\Windows\CurrentVersion\Run


Prevention


Alert level: Severe
First detected by definition: 1.127.1891.0
Latest detected by definition: 1.185.355.0 and higher
First detected on: Jun 13, 2012
This entry was first published on: Jun 22, 2012
This entry was updated on: Jun 26, 2012

This threat is also detected as:
  • PWS-FAAG!1CC49796A593 (McAfee)
  • Trojan.Win32.Jorik.Buterat.bdk (Kaspersky)