JPMorgan Chase asked the FBI back in 2013 whether it could hack back against those who waged a distributed denial-of-service attack against the bank. Federal authorities cautioned the financial services company against taking that step because it would be illegal. Security experts say, from a technical and policy standpoint, hacking back is always a bad idea because it could cause more problems. Hack-backs would likely be ineffective, in part because most victims of cyber-attacks would not be likely to correctly identify the hacker.”]
Source: https://www.databreachtoday.com/case-against-hack-back-a-7759