Researcher Demonstrates How To Counterattack Against A Targeted Attack Targeted attacks might be tough to prevent, but what if you could fight back against the attacker once he’s infiltrated your network? A researcher has come up with a proof-of-concept (PoC) that does just that by finding vulnerabilities in the attacker’s malware and using it against him. Security consultant Andrzej Dereszowski last week at Black Hat Europe demonstrated how it’s possible to wage a counterattack in a targeted attack: His PoC was based on some fuzzing and reverse-engineering he conducted against malware used in an infected PDF that was sent to a pharmaceutical company