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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

PayClicker.EO

Threat LevelHigh threatDamageSevereDistributionNot widespread
Common name:PayClicker.EO
Technical name:Bck/PayClicker.EO
Threat level:Medium
Type:Backdoor
Effects:   It allows to gain remote access to the affected computer. It affects the productivity of the computer, the network to which it’s connected or other remote sites. It changes the security settings of Internet Explorer. It downloads files from several websites. It uses stealth techniques to avoid being detected by the user. It uses anti-monitoring techniques in order to prevent it being detected by antivirus companies. It does not spread automatically using its own means.
Affected platforms:

Windows 2003/XP/2000/NT/ME/98/95

First detected on:Sept. 24, 2006
Detection updated on:Sept. 24, 2006
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies

Brief Description 

    

PayClicker.EO is a backdoor that allows hackers to gain remote access to the affected computer in order to carry out actions that compromise user confidentiality and impede the tasks performed on the computer.

 

It captures certain information entered or saved by the user, with the corresponding threat to privacy: .

 

It affects productivity, preventing tasks from being carried out:

  • In the affected computer: it displays pop-up windows.
  • In the local network: it generates a large amount of network activity and consumes bandwidth.

 

It reduces the security level of the computer: it changes the security settings of Internet Explorer, decreasing its security level.

 

PayClicker.EO accesses several websites to download files, which it then runs. These can be any type of file, although they are normally malware.

 

It uses stealth techniques to avoid being detected by the user:

  • It uses techniques included in its code to hide itself while it is active.
  • It injects itself in running processes.

 

It uses several methods in order to avoid detection by antivirus companies:

  • It prevents scanning tools from running, such as Windows Registry Editor, FileMonitor, etc.
  • Its code is encrypted and it is only decrypted when it is going to run. Because of this, its code is not legible through a memory dump.

 

PayClicker.EO does not spread automatically using its own means. It needs an attacking user's intervention in order to reach the affected computer. The means of transmission used include, among others, floppy disks, CD-ROMs, email messages with attached files, Internet downloads, FTP, IRC channels, peer-to-peer (P2P) file sharing networks, etc.