Details of Virus 21.504

Adware refers to programs that display advertising using any means: pop-ups, banners, changes to the browser home page or search page, etc. The advertisements could be associated with the products or services offered by the creator of the program or by third-parties.

Adware can be installed in a number of ways, on some occasions without users' consent, and either with or without users' knowledge of its function.

21.504 prevents access from programs to websites of several companies related with security tools (antivirus programs, firewalls, etc.).

21.504 redirects attempts to access web pages of certain banks to spoofed pages, with the aim of logging information entered by the user in these pages.

21.504 redirects attempts to access several web pages to a specific IP address.

21.504 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.