Step 2. Download mobileterminal through Cydia or use Iphone Explorer (www.iphone-explorer.com) for Windows
Step 3. Logon as Root and delete below files:
(1). /var/mobile/Library/LockBackground.jpg
(2). /System/Library/LaunchDaemons/com.ikey.bbot.plist
(3). /bin/poc-bbot
(4). /bin/sshpass
(5). /var/log/youcanbeclosertogod.jpg
Step 4. Set up your favourite wallpaper and reboot your device.
P.S. For those who use mobileterminal to delete files and not familiar with linux command,
a. the command for deleting files is "rm". Example, rm /var/mobile/Library/LockBackground.jpg
b. the linux path is case-sensitive, so make sure you type the path correctly.
