When it comes to malware attacks, these are usually only done by hacker groups looking for a quick, malicious profit. It's a different story in South Korea when recently there were reports that a telecommunications company had used this evil technique on their own customers.
KT is a large telecommunications company in South Korea. A report has come out recently which says that the telecommunications company has infected the computers of 600 thousand of their customers with malware around May 2020, four years ago.
This was initially reported by users of the Webhard cloud internet service, who said that saved files were missing, and various other problems. When Webhard examined the issue, he said that the only commonality among all the problematic users was the use of KT's internet service.
In fact, when KT was asked why this issue only plagued their users, a representative replied that malware was sent to KT customers using Webhard services to force them to stop using the service.
They explained again, this is because one of the services offered, which is the Grid Program, uses a peer-to-peer system, namely Bittorent, which causes the KT network to show issues in terms of bandwidth usage that is too high.
The malware that KT sends to their users only issues this Program Grid, by creating new folders, moving user files and making them invisible and hard to find.
This matter seems to have also gone to the South Korean court, and interestingly the court has sided with the telecommunications company, and ordered Webhard to pay KT for the use of high amounts of bandwidth.
Despite this, Webhard still seems to be adamant and says that basically, KT is still using malware to attack their services, and this is not only affecting them, but also KT's own customers who are affected by this act.