Windows 2003/XP/2000/NT/ME/98/95

Boface.O is a worm that spreads by copying itself, without infecting other files.

It captures certain information entered or saved by the user, with the corresponding threat to privacy: passwords saved by certain Windows services.

It reduces the security level of the computer: it terminates processes belonging to security tools, such as antivirus programs and firewalls, leaving the computer defenseless against attacks from other malware.

It uses stealth techniques to avoid being detected by the user:

• It deletes the original file from which it was run once it is installed on the computer.
• It modifies system permissions in order to hide itself.

Boface.O 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.
• Instant messaging: it sends links pointing to a copy of itself to all users included in the infected user's contacts list.