GhostAd malware turns millions of Android phones into ad-serving machines

Millions of Android phones were turned into "advertising factories" by the GhostAd malware hidden in 15 Play Store apps, causing performance and battery drain. The adware, discovered by Check Point, flooded infected devices with continuous ads, even when idle. Despite negative reviews, these apps accumulated millions of downloads. Google has removed the malicious apps and updated Play Protect. Users are advised to check app reviews before downloading to avoid similar threats.