Downloader.BAK is a Trojan, which although seemingly inoffensive, can actually carry out attacks and intrusions: screenlogging, stealing personal data, etc.
Downloader.BAK prevents access from programs to websites of several companies related with security tools (antivirus programs, firewalls, etc.).
Downloader.BAK 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.
Downloader.BAK redirects attempts to access several web pages to a specific IP address.
Downloader.BAK 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.
- IRC: It sends a copy of itself to all users connected to the channel to which the infected user is connected.
- File infection: it infects different types of files, which are then distributed through any of the usual means: floppy disks, email messages with attachments, Internet download, files transferred via FTP, IRC channels, P2P file sharing networks, etc.