"We are monitoring (North Korea's) trend related to bitcoin," the official said, but stopped short of confirming whether the government has detected any concrete sign or evidence that the secretive North is actually involved.

He was guarded as well about whether the government has data on an estimated amount of bitcoin the North possesses. 

He added South Korea is seeking measures to curb North Korea's apparent illicit acts, associated with digital currency, in cooperation with relevant authorities, including the state cybersecurity center," Baik added.

South Korea, a tech-savvy country, is known as a mecca for Bitcoin trading.

The price of bitcoin has sharply jumped over recent months. 

"We are continuing efforts to block North Korea's hacking attempts," Baik said.

The South's major financial and other organizations have at times come under the North's hacking attacks, according to the nation's state spy agency. (Yonhap)