OTOH the article says explicitly "Text clues in the code suggest it is English-speaking.", so I'm gonna go with non-Russian as a first guess. They also note "ac

OTOH the article says explicitly "Text clues in the code suggest it is English-speaking.", so I'm gonna go with non-Russian as a first guess. They also note "accurate attribution is always hard, if not impossible to determine, and increasingly prone to manipulation and error".