Oregon’s campaign finance system web provider, Opus Interactive, is asking all users to change passwords following a ransomware attack Sunday night.

Hackers infiltrated Opus Interactive, granting them access to a C&E Systems database.

C&E Systems handles campaign finance compliance and is used by Oregon candidates, treasurers, political parties, and committees.

The attackers encrypted the database, which included login credentials to ORESTAR.

Only about 6% of C&E Systems users were affected by the hack, but all users are recommended to change passwords.

No sensitive data was accessed, but data was blocked from being accessed by the Opus Interactive team.

Secretary of State Shemia Fagan is currently working with cyber security experts to remedy the situation.