Google Play apps bombard users with 'horrible, intrusive' ads and deplete their battery
Bitdefender says apps affected include a racing simulator, several QR code scanners and a weather app.
Cyber Crime researchers say high-profile breaches have contributed to a thrivng black market.
Login details for Fortnite, Netflix and Uber accounts are selling for as little as £8 on illicit online markets, according to dark web researchers.
A series of high-profile data breaches has contributed to a thriving online black market, with high profile data breaches involving the likes of British Airways and Mariott Hotels seeing logins inundate the dark web.
By reviewing tens of thousands of listings across five popular dark web markets, the researchers found that the cost of individual accounts had generally increased over the last 12 months.
The price for Netflix accounts and Uber accounts, for example, have risen by 37 per cent and 52 per cent respectively since last year.
Fortnite has also seen a huge increase from cyber criminals, following the video game's explosion in popularity since its launch in 2017.
The latest research found that Fortnite accounts were now among the most desirable on the dark web, as despite being free to play, hacked accounts could include valuable in-game items.