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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

GrayBird.IL

Threat LevelHigh threatDamageSevereDistributionNot widespread
Common name:GrayBird.IL
Technical name:Bck/GrayBird.IL
Threat level:Medium
Type:Backdoor
Effects:   It allows to gain remote access to the affected computer. It captures certain information entered or saved by the user, with the corresponding threat to privacy. It uses the infected computer to take malicious actions on other users. It changes system permissions. 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 spreads , across the Internet.
Affected platforms:

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

First detected on:Dec. 10, 2006
Detection updated on:Dec. 10, 2006
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies

Brief Description 

    

GrayBird.IL 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: passwords saved by certain Windows services.

It sends the gathered information to a remote user by any available means: email, FTP, etc.

 

It affects productivity, preventing tasks from being carried out:

  • In the affected computer: it converts the computer into a platform for taking malicious action surreptitiously: spam sending, launch of Denial of Service attacks, malware distribution, etc.

 

It reduces the security level of the computer: it changes system permissions, decreasing the security level.

 

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

  • It injects itself in running processes.
  • It deletes the original file from which it was run once it is installed on the computer.

 

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

  • It terminates its own execution if it detects that it is being executed in a virtual machine environment, such as VMWare or VirtualPC.

 

GrayBird.IL uses the following propagation or distribution methods:

  • Exploiting vulnerabilities with the intervention of the user: exploiting vulnerabilities in file formats or applications. To exploit them successfully it needs the intervention of the user: opening files, viewing malicious web pages, reading emails, etc.
  • Via Internet, exploiting remote vulnerabilities: attacking random IP addresses, in which it tries to insert a copy of itself by exploiting one or more vulnerabilities.