How To Remove Conflicker.B Spam Trojan - (Uninstall Guide)
Article by George Norman
On 21 Oct 2009
A new spam campaign is making the rounds, warning users about a Conflicker.B Infection. The spam message pretends to be a warning message from Microsoft that advises users to download the attached file in order to keep their system protected a new variant of the Conflicker worm. It goes without saying that you should ignore these spam messages; it also goes without saying that you should not download the attachment.

Here is how the spam message looks like:


Subject: Conflicker.B Infection Alert
Attached file:
Message body:

Dear Microsoft Customer,

Starting 18/10/2009 the ‘Conficker’ worm began infecting Microsoft customers unusually rapidly. Microsoft has been advised by your Internet provider that your network is infected.

To counteract further spread we advise removing the infection using an antispyware program. We are supplying all effected Windows Users with a free system scan in order to clean any files infected by the virus.

Please install attached file to start the scan. The process takes under a minute and will prevent your files from being compromised. We appreciate your prompt cooperation.

Microsoft Windows Agent #2 (Hollis)
Microsoft Windows Computer Safety Division

The email’s attachment is a ZIP file that contains a file called install.exe. If you run the install.exe file you will let a Trojan loose on your system. This is what will happen:
  • The settings of Internet Explorer will be changed so that it will run files considered risky
  • You will be presented with phony security warnings like this one (the spelling mistakes are real - see image above): Your computer is infected! Windows has detected spyware infection!
    It is recomended to use special antispyware tools to pervent data loss.Windows will now download and install the most up-to-date antispyware for you.
    Click here to protect your computer from spyware!
  • Rogue antispyware program Antivirus Pro 2010 will be installed on your machine.

Automatic removal guide

Manual removal guide

Using Task Manager, shut down and remove the processes:


Access the Windows Registry Editor and delete the following registry keys:

HKEY_CURRENT_USERSoftwareMicrosoftInternet ExplorerDownload "RunInvalidSignatures" = "1"
HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionPoliciesAssociations "LowRiskFileTypes" = "zip;.rar;.cab;.txt;.exe;.reg;.msi;.htm;.html;.gif;.bmp;.jpg;.avi;.mov;.mp3;.wav"
HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionPoliciesAssociations "SaveZoneInformation" = "1"
HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionPoliciesExplorer "ForceClassicControlPanel" = "1"
HKEY_CURRENT_USERSoftwareMicrosoftInternet ExplorerDownload "CheckExeSignatures" = "no"
HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRun "mserv"
HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRun "svchost"
HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionRun "Antivirus Pro 2010"

Locate and delete the following files:

%UserProfile%Application Dataseres.exe
%UserProfile%Application Datasvcst.exe
%UserProfile%Application Datalizkavd.exe

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