PC Defender Plus

PC Defender Plus Description

ScreenshotEven though PC Defender Plus' name implies that PC Defender Plus is a security application, PC Defender Plus is actually a kind of malware threat from the WinPC Defender family. This program is part of the payload for a dangerous Trojan infection designed to install fake security software on victims' computer systems. Rogue security programs like PC Defender Plus are used to carry out a well known online scam in which criminals convince inexperienced computer users to pay for useless, fake security software. It is important to remember that PC Defender Plus is part of a malware attack on your computer and that all of its indications and messages should be ignored. Rather than following PC Defender Plus' instructions, ESG malware analysts strongly urge computer users to remove this fake security program with a real, effective and fully-updated anti-malware application.

Fake security applications like PC Defender Plus have been the most common kinds of malware infections for the last several years. Among the PC Defender Plus variants are SystemDefender, IE Defender, IE Defender, XPdefender, WinDefender2008, Malware Defender 2009, WinPC Defender, PC Privacy Defender, Smart Defender Pro, Ultimate Defender, Advanced XP Defender, Security Defender Pro 2015.

These fake security programs will display numerous error messages and security alerts, regardless of the actual state of the victim's computer. PC Defender Plus also makes changes to the Windows Registry and to the system settings that allow PC Defender Plus to cause problems deliberately on the infected computer. For example, PC Defender Plus has been known to reduce system performance or to hide files on the infected computer. This is all done to convince the victim that it is necessary to purchase an expensive 'full version' of PC Defender Plus. However, since PC Defender Plus is actually a malware infection, ESG malware researchers advise against paying for an upgraded version of this fake security tool.

There is no question that using properly updated anti-malware software can protect your computer from PC Defender Plus infections. However, most of these kinds of attacks start with a social engineering approach that can be avoided by simply using common sense. You should avoid downloading unknown files or clicking on unknown links. In most cases, the initial Trojan responsible for the PC Defender Plus infection is actually downloaded and installed by the computer users themselves, thinking that it is actually a completely different file (such as a news item or photo contained in a spam email message or a fake video codec for viewing a pornographic streaming video online).

Technical Information

Registry Details

PC Defender Plus creates the following registry entry or registry entries:
RegistryKey
HKEY_CURRENT_USER\.EXE\SHELL\OPEN\COMMAND\
HKEY_CURRENT_USER\.EXE\SHELL\OPEN\
HKEY_CURRENT_USER\.EXE\SHELL\RUNAS\COMMAND\ISOLATEDCOMMAND = "%1" %*
HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\PCDFSVC = %ALLUSERSPROFILE%\Application Data\pcdfdata\[RANDOM CHARACTERS]/min
HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\PCDFDATA\DISPLAYICON = %ALLUSERSPROFILE%\Application Data\pcdfdata\[RANDOM CHARACTERS],0
HKEY_CURRENT_USER\SOFTWARE\CLASSES\.EXE\
HKEY_CURRENT_USER\.EXE\SHELL\
HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\PCDFDATA\
HKEY_CURRENT_USER\.EXE\SHELL\OPEN\COMMAND\ISOLATEDCOMMAND = "%1" %*
HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\PCDFDATA\DISPLAYNAME = PC Defender Plus
HKEY_CURRENT_USER\.EXE\SHELL\RUNAS\COMMAND\
HKEY_CURRENT_USER\.EXE\SHELL\RUNAS\
HKEY_CURRENT_USER\SOFTWARE\CLASSES\.EXE\DEFAULTICON\
HKEY_CURRENT_USER\.EXE\CONTENT TYPE = application/x-m
HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\PCDFDATA\INSTALLLOCATION = %ALLUSERSPROFILE%\Application Data\pcdfdata
HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\PCDFDATA\UNINSTALLSTRING = %ALLUSERSPROFILE%\Application Data\pcdfdata\[RANDOM CHARACTERS] /tout

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