Chinese malware is active in the systems of U.S. companies, according to a cybersecurity firm, but it isn’t clear whether that malware is actively stealing intellectual property.

“We’re seeing activity from a wide range of advanced persistent threat groups,” Laura Galante, director of threat intelligence for cybersecurity firm FireEye, told the Washington Examiner. “But the difference between qualifying whether that’s economic espionage or just malware actively communicating with victims is two very different things.”