Comcast Attack Combines Ransomware, Tech-Support Scam

Staff Writer
Updated

A new malware campaign stalked Comcast cable broadband customers with a one-two punch of ransomware and a tech-support scam, and required only that victims visit a single corrupted Web page. This hybrid campaign may be the first of its kind, and looks to hit users in every way possible.

Rob Wilson/ShutterstockRob Wilson/Shutterstock

Users of Comcast’s Xfinity search engine were exposed to an ad link that reads "DirectTV compared to Comcast TV," which led to a page on the apparently legitimate SatTVPro website. But thanks to an outmoded content-management platform, the page had been infected with the dangerous Nuclear Pack browser exploit kit, which lurked in the background. The corrupted page also sent users to a fake Comcast Xfinity site, which popped up a message informing the victim that his or her computer was infected, and to call a provided toll-free number to speak to "Microsoft security technicians."

The Nuclear Pack exploit kit will attempt to drop many kinds of malware on your computer, including encrypting ransomware that will hijack your system and ask for money. The long-running Windows-tech-support scam is easier to understand, except in this case, the alert window that says your system has been infected isn't telling a lie. But as usual, the toll-free number will put you on the line not with Microsoft technicians, but with call-center workers overseas whose job it is to get you to buy bogus computer-security software.

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Researchers at the San Jose, California-based Malwarebytes security firm discovered the malware campaign and  immediately notified Comcast, Google and the operators of the SatTVPro websites. Google temporarily added SatTvPro to its Safe Browsing blacklist to protect its users from opening the malicious Web page. Earlier today (Dec. 14) the SatTVPro blog switched its content platform from Joomla to WordPress, which seems to have purged the Nuclear Pack exploit kit, and the page in question is no longer blocked by Google.

Image: MalwarebytesImage: Malwarebytes

What isn't clear is who is coordinating this trifecta of malvertising, ransomware and support scam attacks, and who placed the ad link on the Comcast Xfinity page. It's possible that the ad was a legitimately purchased link to direct users to the SatTVPro page. It's also possible that a malicious actor, knowing the page had been infected with the Nuclear Pack exploit kit, bought the ad to funnel victims to the trap.

It may be that a single malevolent entity was directly pocketing the proceeds from the ransomware (and other malware) dropped on victims' PCs by the Nuclear Pack kit, and from the sales of bogus security software generated by the tech-support scams. But it's more likely that the person who infected the SatTVPro page simply collected a small percent of the proceeds from both, and that the exploit-kit handlers and tech-support-scammers didn't know each other.

"From the point of view of a malicious actor redirecting traffic (traffer)," wrote Malwarebytes blogger Jerome Segura, "it makes a lot of sense to get paid a double commission for referral traffic: one from the exploit-kit operator and another from tech-support scammers."

Image: MalwarebytesImage: Malwarebytes

While we advise users to not visit suspicious Web pages or click on shady links, this story is just the latest piece of evidence that skepticism while Web browsing is not enough. Users should protect their system with robust anti-virus software to protect themselves from attacks from reputable websites, should always keep their browsers and operating systems patched and up to date, and should consider disabling or limiting browser plugins commonly attacked by browser exploit kits, such as Adobe Flash Player, Java and Microsoft Silverlight.