Sentence:  It stated to one of the company's operators, “The Phantom, the system <WSD>cracker</WSD>, strikes again . . . Soon I will zero (expletive deleted) your desks and your backups on System A. I have already cracked your System B. 
Meaning of the word marked with <WSD> tags:  One who cracks (i.e. overcomes) computer software or security restrictions.