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.
It uses anti-monitoring techniques in order to prevent it being detected by antivirus companies.
It does not spread automatically using its own means.
|First detected on:||Aug. 7, 2007|
|Detection updated on:||Aug. 7, 2007|
|Yes, using TruPrevent Technologies
Dialer.KNR 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.KNR 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 modifies system permissions in order to hide itself.
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 memory dump program is running, such as Procdump.
- It terminates its own execution if it detects that a debugging program is active.
Dialer.KNR 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.
- It is dropped or downloaded to the computer by other malware specimens, for example: Dropper.XX.