National: The Same Russian Hackers Hit the DNC and the DCCC, Security Firms Say | Foreign Policy
Cybersecurity companies studying the breach of the Democratic National Committee and the Democratic Congressional Campaign Committee have found evidence indicating that the same group of Russian hackers breached both groups’ computer systems. According to ThreatConnect and Fidelis Cybersecurity, two security firms that have been studying the activities of a hacker group dubbed Cozy Bear, hackers from that organization used some of the same internet infrastructure to attack the two Democratic groups. Cozy Bear hackers utilized an email address identified by German intelligence as one used by the group to register an internet domain that was then used in the attack on the DCCC. According to Justin Harvey, the chief security officer at Fidelis, the finding provides 90 percent certainty that hackers working on behalf of Russian intelligence carried out both the DNC and the DCCC attack.

