I am curious about "compiler" attack they are mentioning. Looks like they compromized compiler used to build the code. Any more technical info on this aspect?
I think they compromised Teamcity, or at least I've heard a lot of mentions of Teamcity related to this hack, I could be completely wrong. But it's possible they just got admin access to the Teamcity build server and added their code just before the build was deployed. So not really compromising the compiler per se