Windows 2003/XP/2000/NT/ME/98/95/3.X; IIS

Rizalof.PU is a Trojan, which although seemingly inoffensive, can actually carry out attacks and intrusions.

• In the local network: it generates a large amount of network activity and consumes bandwidth.

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

• It uses techniques included in its code to hide itself while it is active.

It uses several methods in order to avoid detection by antivirus companies:

• It prevents scanning tools from running, such as Windows Registry Editor, FileMonitor, etc.
• It terminates its own execution if it detects that a debugging program is active.

Rizalof.PU 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.
• Via Internet, exploiting remote vulnerabilities: attacking random IP addresses, in which it tries to insert a copy of itself by exploiting one or more vulnerabilities.

Rizalof.PU is easy to recognize, as it shows the following symptoms:

• It displays false error messages when it is run.