Cyber ​​attack on South Korea’s mobile operator compromises nearly 27 million users

Cyber ​​attack against SKT Telom (SKT), South Korea’s largest mobile operator.

The results of the incident have been decided on Monday of the joint inquiry between the authorities and the experts of the private sector regarding the incident. The attack began almost three years agoOn June 15, 2022, when the first ‘malware’ was installed on the company’s servers.

From then on and on April 18 until the abnormalities were detected, The virus extended to at least 23 servers.

The analysis also reveals that the victim’s servers allowed access to access 25 different types of personal dataIncluding USIM card authentication keys. This also indicates that the lack of records between June 2022 and December 2024 prevents rejecting data such as IMEI.

Private sector inspectors They suspect that the Red Menzhen Group isA hacker system and Beijing are said to be supported by cyber security, which is responsible for the attack, which gives its precedent contact by using the PPFDur infiltration scheme on similar attacks against telecommunications companies in Asia. Internet security signatures such as PWC and Trent Micro are monitoring group activities in the region.

Hackers used the ‘Web Shell’ technique

In the case of SKD, the use of a technique called ‘Web shell’ was also found, which allows the attackers CArrooller servers Distance.

Professor Im Zhang-in Korea University assumes that the method of implementing the amount and action of cybercradag may respond to a strategy Disable the main infrastructure in the event of a collisionAs quoted by the local Yonhab news agency, instead of the simple theft of personal information.

Overall, 26.96 million SIM cards were compromised, according to the report, so far, SKT has changed or adjusted more than 1.9 millionA number of expected to increase in the coming months amid issues of supply.

On the other hand, 2.5 million users have joined the fraudulent security service More than 9,000 people have started joint demands for damageSaying economic compensation and excessive transparency in the actual purpose of filtering.

The company assesses possible losses Up to 7 billion ($ 5,000 million), its managing director, Riu Young-Sang, said before the National Parliament.

The Chairman of the SK group, Che Ta-sAt the beginning of the month, the general amnesty for corruption was recognized in communication and respond