Keystroke logger and Data-stealing:

Keystroke loggers: This is a program, once installed on the system, which intercepts the keys when entering the password or the Credit Card number while shopping online. This can be used for Credit Card fraud. 

Data-stealing: This is a web threat that results in stealing of personal and proprietary information to be used for commercial gains either directly or via underground distribution. Some popular examples of recent data-stealing cases are  -  steal and sell large number of credit card numbers from businesses such as TJX, OfficeMax, Sports Authority etc.