a pattern. these patterns include brute force attacks in which hackers try to crack a computer users password they simply track through vast quantities of character combinations until they find the right one that's why experts advise people to use passwords that are as complex as possible. another method involves using a digital form to automatically infected computers that are using outdated software some kinds of worms contain mall where that locks up the computer and orders the user to pay money to unlock it this sort of malware is known as ransomware.