Email accounts of four senior aides at the National Republican Congressional Committee (NRCC) were compromised by cyberattackers during the 2018 midterm election campaigns, according to party officials.
The incident was discovered in April, party officials told Politico. NRCC asked security firm Crowdstrike to investigate; Crowdstrike had already been contracted to secure the committee's internal networks, which reportedly were not compromised in this attack.
Investigation showed that attackers had complete credentialed access to the aides' accounts and had been surveilling them for months. Thousands of email messages were exposed during this time.