What Is a Dialer Trojan?

A dialer Trojan is malware coded to secretly dial phone numbers, leaving the infected victim with a large phone bill. There are two reasons why someone might code and spread a dialer Trojan. The first reason is destructive, perhaps as tool of revenge. The second reason is for financial gain. Simply set up a premium 900 number and charge $5.99 a minute. Then, all the malicious coder needs is a few hundred infected victims to make a decent amount of money.

As a desktop analogy, many free porn web sites use browser-based exploits to infect PC users with dialer Trojans. This is a classic example of dialer Trojans being used for financial gain. Dialer Trojans have been around on PCs for many years. Traditional PC dialer Trojans rely on the infected computer having a working modem, and the modem needs to be connected to a wall socket. It was only a matter of time before someone realized that coding dialer malware for computers that mostly rely on broadband was a waste of time. Such malware coders have now moved to cellular phones.

Types Of Dialers:

Variant 1:

The component downloads the Dialer with the call on the PC and implements it thereafter. Thus that is not downloaded the file as more normally left, but, gets the user is program controlled no message over the fact that a file is downloaded. No certificate is spent. Since the file is downloaded and is not implemented directly, also no safety inquiry comes whether the file is to be really implemented. With it all safety options of the IE are gone around. The consequences:

 

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