“The NSA “intelligence report” the Intercept published along with the piece does NOT show that “Russian military intelligence executed a cyberattack“. The document speaks of “cyber espionage operations” – i.e someone looked and maybe copied data but did not manipulate anything. Espionage via computer networks is something every nation in this world (and various private entities) do all the time. It is simply the collection of information. It is different from a “cyberattack” like Stuxnet which was intended to create large damage.
The “attack” by someone was standard spearfishing and some visual basic scripts to gain access to accounts of local election officials. Any minor criminal hacker uses similar means. No damage is mentioned in the NSA analysis. The elections were not compromised by this operation. The document notes explicitly (p.5) that the operation used some techniques that distinguish it from other known Russian military intelligence operations. It might have been done by someone else.
The document does not provide any raw intelligence. It is an analysis based on totally unknown material. It does not include any evidence for the claims it makes.”