How can i do a software update for malware

Hi yewri,

Thanks for coming out to Apple Support Communities for help restoring your iPhone to factory new condition. Rest assured, we'd love to help in any way we can.

First, we'd like to share a great resource that has detailed information about the advanced security features built-into Apple software and devices that serve to protect your important data:

Apple Platform Security

To completely erase and restore your iPhone, you'll want to complete the steps in this guide:

How to erase your iPhone, iPad, or iPod touch

Let us know if this helps, or if you've got any questions.

Have a great day.

yewri wrote:

So i would like to know what i should and can do in regards to completely doing a factory reset

Your phone doesn’t have malware unless you jailbroke it. You may have scam messages saying you have malware, however. click on this Apple support article→Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support