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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Small.J

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Small.J
Technical name:Trj/Small.J
Threat level:Low
Alias:TrojanDownloader.Win32.Small.j, Downloader-AZ
Type:Trojan
Effects:  

It downloads a program from a webpage, which calls a premium rate number in order to connect to the Internet.  

Affected platforms:

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

Detection updated on:July 29, 2004
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies

Brief Description 

    

Small.J is a dropper type Trojan. Once activated, Small.J downloads and executes a file from an specific webpage.

The downloaded file is Trj/Dialer, a dialer program which calls a premium rate number to connect to the Internet, without the user's consent.

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

Visible Symptoms 

    

Small.J is easy to recognize, as it displays the following message while it downloads the file Trj/Dialer from the Internet: