Zentom System Guard is the name of a rogue from the same family as Antimalware Doctor. This program is categorized as a rogue because it displays false scan results and alerts in order to scare you into thinking that your computer is infected. This rogue is typically promoted through the use of web sites that show an advertisement that pretends to be online anti-malware scanner. Once the advertisement has finished it will state that it has found numerous computer infections and then prompt you to download and install the malware onto your computer.
Once the program is downloaded and installed it will display an alert that states it is a Windows Automatic Update that prompts you to install a System Security Pack Upgrade for Windows. This fake security update is titled
System Security Pack 2010.78.932 (Zentom System Guard Upgrade; KB904067) and does nothing but start the Zentom System Guard program on your computer. Once started it will scan your computer and state that there are numerous infections present, but will not remove any of them until you purchase the program. As all of the scan results this program displays are false, please do not purchase this program based on anything it may display.
Zentom System Guard
For more screen shots of this infection click on the image above.
There are a total of 4 images you can view.
While Zentom System Guard is running it will also display fake security alerts that are crafted to make it seem that your computer is under attack by a remote user or infected with a variety of different computer infections. The text of these alerts include:
Infections on your PC can cause:
- Applications won't start
- Unwanted advertising displaying
- Loss of Internet communication
- Lost documents and settings
- Some files can disappear from PC
- You need registered version of Zentom System Guard to remove these infections.
Click "Remove threats" to activate protection and eliminate these security hazards.
Trojan.Spy threat has been detected.
This threat module advertises websites with explicit content. Be advised of such content being possibly illegal. Please click button below to locate and remove this threat now.
Warning! Removed attack detected!
Zentom System Guard has detected that somebody is trying to stole Your private data remotely via Trojan.Win32.Generic!BT.
Transfer for Your private data via internet will start in: 10 seconds
We strongly recommend You to block attack immediately.
Zentom System Guard - Hacker attack detected
Your computer is subjected to hacker attack. Zentom System Guard has detected that somebody is trying to transfer Your private data via internet. We strongly recommend you to block attack immediately.
Firewall file transfer detected
Hidden file transfer to remote host was detected
Zentom System Guard has detected that somebody is trying to transfer Your private data via internet. We strongly recommend you to block attack immediately.
Warning! Threat detected!
Threat module detected on your PC!
Zlob.Porn.Ad threat has been detected. This threat module advertises websites with explicit content. Be advised of such content being possibly illegal. Please click button below to locate and remove this threat now.
Network intrusion detected!
Warning! Network attack detected!
Process is trying to steal your passwords listed below. It is highly recommended to block this threat now.
Your computer is being attacked from a remote PC.
Attack from: 126.96.36.199:34630
Protection Center Alert
To help protect your computer, Zentom System Guard has blocked some features of this program
Zentom System Guard has detected unauthorized activity, but unfortunately trial version cannot remove viruses, keyloggers and other treats. Your personal data under serious risk. It is strongly recommended to register Your copy of Zentom System Guard and prevent intrusion for future.
Do You want to block this suspicious software?
Alert level: High
Description: It is highly recommended to remove this threat from your PC
As all of these security alerts are fake and are only being shown to scare you into purchasing the program. Therefore, please ignore anything this program displays.
As you can see, Zentom System Guard was created to scare you into thinking that your computer has a security problem so that you will then purchase the program. For no reason should you purchase Zentom System Guard, and if you have, you should contact
your credit card company and dispute the charge stating that the program is
a computer virus. To remove Zentom System Guard and any related malware, please
follow the steps in the removal guide below.
View Zentom System Guard files.
View Zentom System Guard Registry Information.
Entries for this program found in the Uninstall Programs control panel:
Zentom System Guard
Tools Needed for this fix:
Symptoms that may be in a HijackThis Log:
O4 - HKCU\..\Run: [<random>.exe] "%AppData%\<random>\<random>.exe"
07/19/11 - Initial guide creation.
Automated Removal Instructions for Zentom System Guard using Malwarebytes Anti-Malware:
- Print out these instructions as we may need to close every window that is
open later in the fix.
- It is possible that the infection you are trying to remove will not allow
you to download files on the infected computer. If this is the case, then
you will need to download the files requested in this guide on another computer
and then transfer them to the infected computer. You can transfer the files
via a CD/DVD, external drive, or USB flash drive.
- Before we can do anything we must first end the processes that belong to
Zentom System Guard
so that it does not interfere with the cleaning procedure. To do this, please
download RKill to your desktop from the following link.
Download Link - (Download page will open in a new tab or browser window.)
When at the download page, click on the Download Now button
labeled iExplore.exe download link. When you are prompted
where to save it, please save it on your desktop.
- Once it is downloaded, double-click on the iExplore.exe
icon in order to automatically attempt to stop any processes associated with
Zentom System Guard
and other Rogue programs. Please be patient while the program looks for various
malware programs and ends them. When it has finished, the black window will
automatically close and you can continue with the next step. If you get a
message that RKill is an infection, do not be concerned. This message is just
a fake warning given by
Zentom System Guard
when it terminates programs that may potentially remove it. If you run into
these infections warnings that close RKill, a trick is to leave the warning
on the screen and then run RKill again. By not closing the warning, this typically
will allow you to bypass the malware trying to protect itself so that rkill
Zentom System Guard
. So, please try running RKill until the malware is no longer running. You
will then be able to proceed with the rest of the guide. If you continue
having problems running RKill, you can download the other renamed versions
of RKill from the rkill
download page. All of the files are renamed copies of RKill, which you
can try instead. Please note that the download page will open in a new browser
window or tab.
Do not reboot your computer after running RKill as the malware programs will
- At this point you should download Malwarebytes Anti-Malware, or MBAM, to scan your computer for any any infections or adware that may be present. Please download Malwarebytes from the following
location and save it to your desktop:
Malwarebytes Anti-Malware Download Link (Download page will open in a new window)
- Once downloaded, close all programs and Windows on your computer, including
- Double-click on the icon on your desktop named mbam-setup.exe.
This will start the installation of MBAM onto your computer.
- When the installation begins, keep following the prompts in order to continue
with the installation process. Do not make any changes to default settings
and when the program has finished installing, make sure you leave Launch
Malwarebytes Anti-Malware checked. Then click on the Finish button. If MalwareBytes prompts you to reboot, please do not do so.
- MBAM will now start and you will be at the main screen as shown below.
Please click on the Scan Now button to start the scan. If there is an update available for Malwarebytes it will automatically download and install it before performing the scan.
- MBAM will now start scanning your computer for malware. This process can
take quite a while, so we suggest you do something else and periodically
check on the status of the scan to see when it is finished.
- When MBAM is finished scanning it will display a screen that displays any malware that it has detected. Please note that the infections found may be different
than what is shown in the image below due to the guide being updated for newer versions of MBAM.
You should now click on the Remove Selected button to remove
all the seleted malware. MBAM will now delete all of the files and registry
keys and add them to the programs quarantine. When removing the files, MBAM
may require a reboot in order to remove some of them. If it displays a message
stating that it needs to reboot, please allow it to do so. Once your computer
has rebooted, and you are logged in, please continue with the rest of the
- You can now exit the MBAM program.
- As many rogues and other malware are installed through vulnerabilities found
in out-dated and insecure programs, it is strongly suggested that you use
Secunia PSI to scan for vulnerable programs on your computer. A tutorial on
how to use Secunia PSI to scan for vulnerable programs can be found here:
detect vulnerable and out-dated programs using Secunia Personal Software Inspector
Your computer should now be free of the
Zentom System Guard
program. If your current anti-virus solution let this infection through,
you may want to consider purchasing the
PRO version of Malwarebytes Anti-Malware to protect against these types
of threats in the future.
If you are still having problems with your computer after completing these instructions, then please follow the steps outlined in the topic linked below:
Preparation Guide For Use Before Using Malware Removal Tools and Requesting Help
View Associated Zentom System Guard Files
%AppData%\Microsoft\Internet Explorer\Quick Launch\Zentom System Guard.lnk
%StartMenu%\Zentom System Guard.lnk
%StartMenu%\Programs\Zentom System Guard\
%StartMenu%\Programs\Startup\Zentom System Guard.lnk
%StartMenu%\Programs\Zentom System Guard\Uninstall.lnk
%StartMenu%\Programs\Zentom System Guard\Zentom System Guard.lnk
%UserProfile%\Desktop\Zentom System Guard.lnk
File Location Notes:
%UserProfile% refers to the current user's profile folder. By default, this is C:\Documents and Settings\<Current User> for Windows 2000/XP, C:\Users\<Current User> for Windows Vista/7/8, and c:\winnt\profiles\<Current User> for Windows NT.
%AppData% refers to the current users Application Data folder. By default, this is C:\Documents and Settings\<Current User>\Application Data for Windows 2000/XP. For Windows Vista and Windows 7 it is C:\Users\<Current User>\AppData\Roaming.
%StartMenu% refers to the Windows Start Menu. For Windows 95/98/ME it refers to C:\windows\start menu\, for Windows XP, Vista, NT, 2000 and 2003 it refers to C:\Documents and Settings\<Current User>\Start Menu\, and for Windows Vista/7/8 it is C:\Users\<Current User>\AppData\Roaming\Microsoft\Windows\Start Menu.
This is a self-help guide. Use at your own risk.
BleepingComputer.com can not be held responsible for problems that may occur by using this information. If you would like help with any of these fixes, you can ask for malware removal assistance in our Virus, Trojan, Spyware, and Malware Removal Logs forum.
If you have any questions about this self-help guide then please post those questions in our Am I infected? What do I do? and someone will help you.