Fake Antivirus Scams Targeting Android Users | threatpost
Once again, it can't be stated too strongly: Install ONLY from the Android market, or Amazon Market.
Fake antivirus software, or "scareware" scams have been one of the tried and true methods that crooks have used to make illegal profits online in recent years. The scams often offer convincing replicas of legitimate anti malware software to trick users into installing malicious programs that can steal sensitive information or encrypt hard drives and extort money from the owner to decrypt the data.
Once again, it can't be stated too strongly: Install ONLY from the Android market, or Amazon Market.