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

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

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

It sends the gathered information to a remote user by any available means: email, FTP, etc.

QQPass.TH prevents access from programs to websites of several companies related with security tools (antivirus programs, firewalls, etc.).

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

• It terminates its own execution if it detects that it is being executed in a virtual machine environment, such as VMWare or VirtualPC.
• Its code is encrypted and it is only decrypted when it is going to run. Because of this, its code is not legible through a memory dump.

QQPass.TH 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.