If you are using the Jailbreak Apple iphone than you may infected by new iPhone Worm.

Some of the Apple iPhone users in Australia have reported that their iPhones have become infected by a worm, which changes your iPhone wallpaper to a picture of 1980s pop singer and internet meme Rick Astley. The worm targets users who have jailbroken their phone but have not changed their default root login password.

Here is the Guide to Secure your Apple iphone from Virus and Worms. Read more:

1. Go to cydia and look for “MobileTerminal” and install the app, then reboot your iPhone.

2. Run MobileTerminal, This program will be on your SpringBoard are called “Terminal”.

3. Obtain Administrator Access, Run “su root” and provide the root password. The default password as provided by Apple is “alpine”.

4. Change the root Password

Run “passwd” and type in your new password twice. Please note that it will not be displayed on the terminal screen.

iPhone:~ root# passwd
Changing password for root.
New password:
Retype new password:
iPhone:~ root#

5. Close MobileTerminal

Congratulations! Done and hope your iPhone is safe for now!