Bolzano.5396 is a virus that spreads to other computers by copying its code to other files or programs.
Bolzano.5396 prevents access from programs to websites of several companies related with security tools (antivirus programs, firewalls, etc.).
Bolzano.5396 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.
Bolzano.5396 redirects attempts to access several web pages to a specific IP address.
Bolzano.5396 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.
- 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.
Bolzano.5396 uses the following infection strategies:
- Polymorphic: it encrypts itself in a different way with each infection it carries out. In order to do this, it uses different keys and operations. As a result, the virus has different characteristics in each new infection, which makes it difficult for antivirus pro-grams to detect this virus.
- Encrypted: it encrypts its code in order to make it difficult to detect. In order to carry out its infection, the virus decrypts itself and, once infection has been carried out, it encrypts itself again.
- Cavity: it infects files without modifying their size or corrupting the data they contain, as it takes advantage of the cavities in these files to insert its code.