FBI Probes If Banks Hacked Back as Firms Mull Offensives

So say a dozen security specialists and former law-enforcement officials, who described an intensifying and largely unspoken sense of unease inside many companies after the recent breach of Sony Corp. 's networks. U.S. officials have shown little appetite to intervene as banks, retailers, casinos, power companies and manufacturers have been targeted by foreign-based hackers.

http://www.bloomberg.com/news/2014-12-30/fbi-probes-if-banks-hacked-back-as-firms-mull-offensives.html