The areas affected by the "KT small-amount payment hacking case" are growing. In addition to the previously known southwestern Seoul and parts of Gyeonggi Province, losses also occurred in Seoul's Seocho District and Dongjak District, and in Ilsan Dong District of Goyang, Gyeonggi Province.
According to materials submitted by KT to the office of Rep. Hwang Jeong-a of the Democratic Party of Korea on the 21st, unauthorized small-amount charges on KT mobile phones appeared as follows. In the areas of Seoul's Dongjak District, Gwanak District, and Yeongdeungpo District, from 5th to 8th of last month, 15 people suffered 26 unauthorized charges totaling 9.62 million won.
In Seocho District, on the 8th and 11th, three people were hit six times for a total of 2.27 million won. In Gwangmyeong, Gyeonggi Province, on the 12th and 13th; in Seoul's Geumcheon District on the 15th; in Ilsan Dong District on the 20th; and in Gwacheon, Gyeonggi Province on the 21st, there were unauthorized small-amount payments. Starting on the 26th, there were additional cases in the previously known areas of Seoul's Geumcheon District, Bucheon in Gyeonggi Province, and Bupyeong District in Incheon.
KT has identified 362 cases with losses totaling 2.4 billion won. KT is tallying cases where small-amount payments were made after intercepting ARS (automatic response system) signals, among others. Earlier, KT reported four traces of server intrusion and two suspicious circumstances to the Korea Internet & Security Agency (KISA).