Welcome to the Virus Encyclopedia of Panda Security.
It establishes a phone connection with a high rate number.
It uses stealth techniques to avoid being detected by the user.
, across the Internet.
|First detected on:||June 5, 2006|
|Detection updated on:||June 5, 2006|
|Yes, using TruPrevent Technologies
Dialer.HFN is a dialer type malware. Dialers usually try to establish phone connections with high rate numbers, significantly increasing the phone bill of the affected user.
Dialer.HFN affects computers that use a modem to connect to the Internet, as the virus modifies the Dial-up network access settings. It changes the telephone number provided by the ISP (Internet Service Provider), which is a local-rate number, to a high-rate number.
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 injects itself in running processes.
- 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.
Dialer.HFN 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.
Dialer.HFN is easy to recognize, as it shows the following symptoms:
- It displays false error messages when it is run.
- It creates shortcuts in the Windows Desktop.