My colleague was surfing the net with my NEW android in my absence. I do not know what he surfed but when I clicked "back" in the browser ..It took me to a website called "cookmobiapps.xyz" and my mobile just started vibrating continuously with a message "your battery is infected with 2 viruses, hit OK to remove. DO NOT LEAVE WEBPAGE" Everything on the screen froze so I clicked OK, then a screen appeared asking me to download an app from googleplay (which I didnt). My phone works fine now and I have not tried hitting the back button again. Why did this happen? What was that message about? Its a new phone and Im very worried :'(

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    No problems are there with your phone. It was the browser which caused that vibration and it did so because that popup/website told it to do so. Coupled with that scary message is what constitutes a typical phishing attempt on Android devices. Always ignore whatever they say or recommend, no matter what. Since they are inconvenient, switch to an ad blocker. Let us know when the issue is resolved. – Firelord Mar 5 '16 at 11:06
  • Hmm. Can any components of the power source house any executable code? – can-ned_food Apr 10 '17 at 15:45

Reposted from comments by user154667:

I installed 360 Security antivirus for Android, which detected a malware (that I removed). I deleted the history, cookies, cache, etc. I cleared the cache through some app manager, and it worked. I'm not getting those malicious websites now when I hit Back.

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