This mobile Trojan from China fills your phone with porn apps

"Hummer" has become the world's biggest mobile Trojan threat

Malware that secretly installs porn apps on your phone is infecting devices by the millions, becoming the world’s largest mobile Trojan.

The malware, called "Hummer," is a family of Trojans that imitate Android apps before striking, according to Cheetah Mobile, a maker of security and utility apps.

The company’s researchers have been tracking Hummer since 2014. It's been infecting more than 1 million devices per day, far outpacing other kinds of mobile Trojans, the company said in a post on Wednesday.

India, Indonesia, Turkey, China and Mexico are the top five countries where the Trojan has been spreading the most, but it's also hit victims in the U.S. and Europe.

Users are downloading Hummer Trojans thinking they’ll gain access to YouTube or other Google services. But in reality, Hummer secretly “roots” the user’s device, gaining admin-level access to the operating system.

It then installs any number of unwanted apps, including games and apps related to porn. In addition, the Trojan serves countless pop-up ads to the screen. In Cheetah Mobile’s own testing, Hummer could force the device to download 2GB worth of network data within hours.

Even users who try to uninstall the apps will find them reinstalled again, the company added.

The developers of Hummer are probably making money by serving ads and forcing the app installations. That could be enough to generate about US$500,000 a day, Cheetah estimated.

China might be the source of the Trojan family. The group behind the malware has been using domain names that are linked to an email account in that country.

Hummer is difficult to delete, and even a factory reset won’t eliminate it, Cheetah Mobile said. Cheetah says it has an app that can remove the malware.

Users have a better chance of avoiding Android Trojans if they don't download apps from untrusted sources. This is more difficult in some places, such as China, where there is no access to Google Play. Users there download apps from third-party app stores, exposing them to possible malware.

Kaspersky Lab has also said it has detected Hummer, but it calls the malware "Trojan.AndroidOS.Iop."

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Michael Kan

IDG News Service
Show Comments

Brand Post

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Luke Hill

MSI GT75 TITAN

I need power and lots of it. As a Front End Web developer anything less just won’t cut it which is why the MSI GT75 is an outstanding laptop for me. It’s a sleek and futuristic looking, high quality, beast that has a touch of sci-fi flare about it.

Emily Tyson

MSI GE63 Raider

If you’re looking to invest in your next work horse laptop for work or home use, you can’t go wrong with the MSI GE63.

Laura Johnston

MSI GS65 Stealth Thin

If you can afford the price tag, it is well worth the money. It out performs any other laptop I have tried for gaming, and the transportable design and incredible display also make it ideal for work.

Andrew Teoh

Brother MFC-L9570CDW Multifunction Printer

Touch screen visibility and operation was great and easy to navigate. Each menu and sub-menu was in an understandable order and category

Louise Coady

Brother MFC-L9570CDW Multifunction Printer

The printer was convenient, produced clear and vibrant images and was very easy to use

Edwina Hargreaves

WD My Cloud Home

I would recommend this device for families and small businesses who want one safe place to store all their important digital content and a way to easily share it with friends, family, business partners, or customers.

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?