Prep.B is a virus that spreads to other computers by copying its code to other files or programs.
Prep.B prevents access from programs to websites of several companies related with security tools (antivirus programs, firewalls, etc.).
Prep.B 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.
Prep.B redirects attempts to access several web pages to a specific IP address.
Prep.B 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.
Prep.B uses the following infection strategies:
- Prepending: it enters its code at the beginning of the file it infects. By doing this, it ensures that the virus is run every time the infected file is executed, but without interfering the functioning of the file.