Trojan.Downloader.VB is a trojan created to exploit software vulnerabilities. Once infected by Trojan.Downloader.VB, it may modify the user’s computer registry and place certain files in key system directories to run on every Windows startup.

In addition, Trojan.Downloader.VB may use the user’s Internet connection to download and install additional malware on the user’s computer system. Trojan.Downloader.VB may also generate popups, causing system slowdowns and threatening user’s privacy. Trojan.Downloader.VB may reduce the user’s Internet speed and cause difficulties while running other applications.

Smart Antivirus 2009 or SmartAntivirus2009, is a rogue anti-spyware application related to MS Antivirus 2008 and clone of XPAntivirus and WinAntivirusPro. Smart Antivirus 2009 may have installed in the user’s computer system by a Trojan Zlob or the user may have clicked on a rogue security popup from a domain related to Smart Antivirus 2009. Smart Antivirus 2009’s fake popups may state that the user’s computer is infected with spyware and then launch a rogue online malware scanner. Smart Antivirus 2009 will try to make the user believe he/she is infected with spyware to then offer Smart Antivirus 2009’s full version of the program to remove the spyware found.

If the user is infected through a Trojan Zlob, he/she may be bombarded by rogue Windows alerts informing the user about spyware infections found in the computer system. These alerts will not dissapear unless the user purchases the full Smart Antivirus 2009 program. However, Smart Antivirus 2009 will not able to locate or remove any spyware infections.

In addition, Smart Antivirus 2009 may change the user’s desktop background to a rogue security alert and disable access to user’s display properties. Smart Antivirus 2009 may cause damage to Windows operating system and install additional malware. Smart Antivirus 2009 is another scam created to trick users into purchasing a rogue anti-spyware program for $50.00. Smart Antivirus 2009 is known to launch on every Windows startup.

XLG Security Center, XLG SecurityCenter or XL Guarder, is a rogue anti-spyware application. XLG Security Center is usually installed by Trojan Zlob through a fake video codec download or the user may have downloaded it from a malicious website. Once infected, Zlob may generate a large amount of fake popups and system notification messages stating that the user’s computer is being threatened by spyware. XLG Security Center will then urge the user to purchase XLG Security Center’s full version of the program to remove the imaginary threats.

In addition, XLG Security Center may generate a fake system scan and display a list of spyware infections as a result of the scan. If the user decides to purchase the rogue anti-spyware program, he/she will be redirected to XLG Security Center’s website, XLGuarder.com, to further download the full XLG Security Center program. XLG Security Center may hijack the user’s Internet browser and launch on every Windows startup.

AntivirusDoc or Antivirus Doc, is a rogue anti-spyware application, clone of WinAntivirusPro. AntivirusDoc is usually installed by Trojan Zlob or Vundo, or the user may have downloaded it manually from a malicious website. Once Zlob is installed, it may generate an exaggerated amount of popups stating that the user’s computer is infecetd with spyware. In order to remove the imaginary threats, AntivirusDoc will then urge the user to purchase its full version. In addition, AntivirusDoc may run its computer system scan to deceive the user into believing his/her computer is infecetd with spyware.

The links provided by AntivirusDoc may redirect the user to AntivirusDoc’s homepage, AntivirusDoc.net, where AntivirusDoc’s “full” version of the program is sold as a legitimate spyware removal tool. AntivirusDoc may run on every Windows startup.

XLG Privacy Control Center or XLGPrivacyControlCenter, is a rogue anti-spyware application, clone of XLG Security Center and XLGuarder. XLG Privacy Control Center may have installed in the user’s computer system by Trojan Zlob through a fake video codec installation, spam email or it may have come bundled with other malware software. Once infected, the user will receive a large amount of fake popup adverts and system notification messages informing the him/her about the imaginary threats found on his/her computer. XLG Privacy Control Center will then offer XLG Privacy Control Center’s full version to remove the imaginary spyware infections. XLG Privacy Control Center may also display a rogue icon on the user’s system tray stating that the user’s computer is infected with spyware.

XLG Privacy Control Center may also launch its rogue system scanner and emulate a computer system scan. XLG Privacy Control Center will then display a list of spyware infections and redirect the user to XLG Privacy Control Center’s website or other malicious websites that distribute XLG Privacy Control Center’s full program as a real spyware removal application.

XLG Privacy Control Center may launch on every Windows startup. XLG Privacy Control Center may recreate itself, making it difficult to remove manually.