WASHINGTON — For years, the cybersecurity firm FireEye has been the first call for government agencies and companies around the world who have been hacked by the most sophisticated attackers, or fear they might be.Now it looks like the hackers — in this case, evidence points to Russia’s intelligence agencies — may be exacting their revenge.FireEye revealed on Tuesday that its own systems were pierced by what it called “a nation with top-tier offensive capabilities.” The company said hackers used “novel techniques” to make off with its own tool kit, which could be useful in mounting new attacks around the …
