@buherator@infosec.place @GossiTheDog @screaminggoat
Symantec says their protection bulletin was prompted by the AhnLab blog post.
I believe @buherator is right. Whether Microsoft found a continuation of the same campaign, with a slightly different approach / toolset, is impossible to tell.
Judging by the capabilities provided by the Godzilla post-exploitation framework and the Godzilla webshell, I wold venture to say that they are one and the same, only Microsoft used that particular expression (and did not elaborate on it, which means they expect the readers to be familiar with it already - i.e., it's known and documented).