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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Cimuz.X

Threat LevelHigh threatDamageSevereDistributionNot widespread
Common name:Cimuz.X
Technical name:Trj/Cimuz.X
Threat level:Medium
Alias:Zurrusco
Type:Trojan
Effects:  

It opens a random port in order to allow the computer to be used as an HTTP proxy, and connects to several websites in order to notify its author that the computer has been affected.

Affected platforms:

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

First detected on:Sept. 5, 2005
Detection updated on:Dec. 1, 2005
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies

Brief Description 

    

Cimuz.X is a Trojan that opens a random port, acting as a backdoor and allowing the affected computer to be used as an HTTP proxy.

Then, it connects to several web addresses, in order to notify its author that the computer has been compromised.

Cimuz.X is able to bypass process oriented firewalls, as it injects its own process into others that may have unlimited access to the Internet. It also adds its process to the list of authorized applications of the Windows XP firewall.

Cimuz.X 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.

Visible Symptoms 

    

Cimuz.X is difficult to recognize, as it does not display any messages or warnings that indicate it has reached the computer.