North Korea is likely behind the hacking of a word processing program used in South Korea, according to a recent report from cyber-security FireEye.

The program – called Hangul Word Processor – was developed by South Korean company Hancom Inc. and is commonly used in the country’s government and public institutions.

The report concluded the exploit was likely carried by North Korean hackers, though admitted direct attribution was difficult in such cases.

“While not conclusive, the targeting of a South Korean proprietary word processing software strongly suggests a specific interest in South Korean targets, and based on code similarities and