There’s a few reasons but a General from STRATCOM leaked it from memory being a major one and I generally think there was probably a bit of a messaging component going on there where the US wanted to flex both in terms of their capabilities but also as to what they considered to be “norms” in the cyber context.

I.e here is an example of what we consider to be legitimate use to compare and contrast with say North Korea’s Sony hack.

But also it lost a lot of its value as a secret once it was already done.