F-Secure
Tools
Dialer:W32/InstantAccess
Summary
A program that connects the computer to the Internet via a telephone line and modem. Malicious dialers secretly connect the computer to premium-rate lines, greatly increasing the usage charges payable by the user.
Additional Details
This malware family behaves as a typical malicious dialer. It connects to premium rate numbers in order to increase its monetary gain from users of the service. Depending on the bundled configuration, this family also provides users with access to pornographic websites.
Additional download attempts may be triggered when the dialer updates itself or when it is uninstalled. The downloaded files are typically downloaded from file hosting sites; what files are downloaded from which site will vary depending on the specific dialer installed.
Installation
On installation, dialers belonging to this family typically create and install their components in:
One of the component files dropped in %Program Files% contains the dialer's configuration information - what number to dial and where to connect to.
In addition, a DLL component, typically with EGCOMLIB* as filename prefix, is created in %System% folder.
A copy of the main component is also stored in %Windows% directory.
Registry
The following registry key is created and contains several configuration details of the application:
An Autorun registry entry is also created:
Additional download attempts may be triggered when the dialer updates itself or when it is uninstalled. The downloaded files are typically downloaded from file hosting sites; what files are downloaded from which site will vary depending on the specific dialer installed.
Installation
On installation, dialers belonging to this family typically create and install their components in:
• %Program Files%\Instant Access
In addition, a DLL component, typically with EGCOMLIB* as filename prefix, is created in %System% folder.
A copy of the main component is also stored in %Windows% directory.
Registry
The following registry key is created and contains several configuration details of the application:
• HKCU\Software\EGDHTML
An Autorun registry entry is also created:
• HKCU\Software\Microsoft\Windows\Currentversion\Run
Instant Access = [Dialer Launcher Component]
Instant Access = [Dialer Launcher Component]