A new malware named GriftHorse is said to have infected over 10 million Android cell phones. According to the research at mobile security firm Zimperium, the threat group has been executing the campaign since November 2020. The GriftHorse malware was propagated through both Google Play and third-party application stores, according to the research group, and it stole "hundreds of millions of Euros" from victims. 

GriftHorse will produce a significant number of notifications and popups when a user downloads any of the malicious programmes, luring consumers in with exceptional discounts or prizes. People who click these are taken to a web page where they must authenticate their phone number in order to gain access to the promotion. 

In actuality, GriftHorse's victims are paying for premium SMS services that cost more than $35 per month. GriftHorse operators are thought to have made anywhere from $1.5 million to $4 million per month with this fraud, and their initial victims are thought to have lost more than $230 if they didn't stop the scam. 

GriftHorse malware has been tracked by Zimperium researchers Aazim Yaswant and Nipun Gupta for months, and they describe it as "one of the most widespread campaigns the zLabs threat research team has encountered in 2021." But, according to the two Zimperium researchers, the GriftHorse developers put a lot of effort into the quality of their malware, using a wide range of websites, malicious apps, and developer personas to infect victims and evade detection as much as possible.

“The level of sophistication, use of novel techniques, and determination displayed by the threat actors allowed them to stay undetected for several months,” Yaswant and Gupta explained. “In addition to a large number of applications, the distribution of the applications was extremely well-planned, spreading their apps across multiple, varied categories, widening the range of potential victims.” 

Handy Translator Pro, Heart Rate and Pulse Tracker, Geospot: GPS Location Tracker, iCare – Find Location, and My Chat Translator are among the popular apps infested with GriftHorse malware. Users in India are also affected, according to the firm. Zimperium, a member of the App Defense Alliance, claimed it alerted Google about all GriftHorse-infected apps, which have since been withdrawn from the Play Store. These apps may, however, still be available in third-party app stores.