A Web browser that promises to help the user surf to explicit Web sites bundles malicious software, a researcher has warned.

“It comes with its very own rootkit,” Chris Boyd, director of research at FaceTime Communications wrote on his blog Wednesday.

The program, called NetBrowserPro, is advertised in poor English on a Web site as a tool with a purpose: “NetBrowserPro is the internet browser which aimed to the one thing–help you to watch porn. Secure, confidential, quick and free.”

When installing NetBrowserPro a rootkit gets dropped on the PC, Boyd found. A rootkit could provide a cloak for cybercrooks. Also, the browser asks to install an application called MovieCommander which, according to Boyd, is associated with fake codecs that are known to install spyware on computers.