Leaked Files Show How NSA Tracks Other Countries’ Hackers

When the mysterious entity known as the “Shadow Brokers” released a tranche of stolen NSA hacking tools to the internet a year ago, most experts who studied the material homed in on the most potent tools, so-called zero-day exploits that could be used to install malware and take over machines. But a group of Hungarian security researchers spotted something else in the data, a collection of scripts and scanning tools that the National Security Agency uses to detect other nation-state hackers on the machines it infects.

Source: theintercept.com