Minister Yoo Sang-im (second from the right) is present at the SK Telecom hacking inquiry held on the afternoon of Nov. 8 at the National Assembly Science, Technology, Information and Broadcasting Committee in Yeouido, Seoul, answering questions from lawmakers. From the left are Ryu Young-sang, CEO of SK Telecom, Deputy Minister Kang Do-hyeon, and Chairman Lee Jin-sook of the Korea Communications Commission. /Courtesy of News1

It has been confirmed that three investigations have been conducted regarding 33,000 servers at risk due to the SK Telecom hacking incident.

Kang Do-hyun, the Second Deputy Minister of Science and ICT, attended the National Assembly's Science, Technology, Information, Broadcasting and Communications Committee hearing on the SK Telecom hacking and noted, "There are about 33,000 servers at risk, and we have investigated that part three times and are currently conducting a fourth investigation."

However, he stated that it is difficult to standardize the progress rate as there are more than 400,000 base stations and hardware servers in total.

SK Telecom refrained from commenting regarding the recently discovered eight types of malware found on three Home Subscriber Servers (HSS) that were previously hacked.

Lee Sang-jung, president of the Korea Internet and Security Agency (KISA), responded that this fact is "correct." However, when asked if the resident registration numbers or other sensitive personal information servers had not been compromised, Ryu Jeong-hwan, vice president of SK Telecom, replied, "I cannot speak on that matter as it is under investigation."