"Attention government sponsors of cyber warfare and those who profit from it!!!!" the hackers wrote in a manifesto posted on Pastebin, on GitHub, and on a dedicated Tumblr. "How much you pay for enemies cyber weapons? [...] We find cyber weapons made by creators of stuxnet, duqu, flame."

The hackers referred to their victims as the Equation Group, a codename for a government hacking group widely believed to be the NSA.'

The security firm Kaspersky Lab unmasked Equation Group in 2015, billing it as the most advanced hacking group Kaspersky researchers had ever seen. While Kaspersky Lab stopped short of saying it's the NSA, its researchers laid out extensive evidence pointing to the American spy agency, including a long series of codenames used by the Equation Group and found in top secret NSA documents released by Edward Snowden. The Equation Group, according to Kaspersky Lab, targeted the same victims as the group behind Stuxnet, which is widely believed to have been a joint US-Israeli operation targeting Iran's nuclear program, and also used two of the same zero-day exploits.