Not everyone agrees with those findings. A lone hacker known as Guccifer 2.0 has tried to take credit for the breach and denies having any ties to Russia. To prove his claims, he leaked some stolen DNC documents last month and said additional files were sent to WikiLeaks for publication.
But security experts are skeptical. Some believe Guccifer is part of a Russian-led misinformation campaign to divert blame from the country.
Even if it turns out that state-sponsored hackers were not responsible in this case, they'll have learned from the DNC breach, said Yonatan Striem-Amit, CTO at security firm Cybereason.
“Nation-state actors are looking at this right now and realizing that they have a very important tool for political influence,” he said.
Russian officials have flatly denied any involvement with the DNC breach.
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