Probe into SK Telecom data breach expands to KT, LG Uplus
Initially, the team had asked local telecommunications and platform companies to conduct their own cybersecurity inspections. However, the approach was revised last week amid growing concerns that hackers using
BPFDoor malware
variants may have also targeted other South Korean mobile carriers, according to the sources.
Following the expanded investigation, no traces of hacking activity have yet been found on the servers of KT or LG Uplus, they added, reports Yonhap news agency.
In a media briefing last week, the investigation team revealed interim findings indicating that 25 malware variants had been discovered on 23 servers belonging to SK Telecom. These included 24 variants of the BPFDoor malware and one variant of WebCell.
Two of the affected servers had been used as temporary storage for personal data, such as names, birthdates, phone numbers and email addresses, as well as
international
mobile equipment identity (IMEI) data.
The IMEI is a unique identifier for each device on a network and could potentially be exploited in financial transactions.
Servers at SK Telecom Co. containing personal information and universal subscriber identity module (USIM) data of all subscribers have been compromised in a cyberattack, raising concerns that critical USIM data used in financial transactions may have been leaked, a joint government-private investigation team.
According to the team's interim findings, the breach dates back to June 15, 2022, when unidentified attackers are believed to have planted malware on the company's servers. SK Telecom discovered the breach only a month ago, on April 18.
Investigators said it is believed that 9.32 gigabytes of USIM data, equivalent to roughly 26.9 million international mobile subscriber identity (IMSI) numbers, have been leaked. SK Telecom currently has 25 million subscribers, including 2 million budget phone users.
Try Our AI Features
Explore what Daily8 AI can do for you:
Comments
No comments yet...
Related Articles
Economic Times
6 hours ago
- Economic Times
Who is Yeonsoo Go? South Korean student and a priest's daughter detained by US immigration officials
Synopsis Yeonsoo Go, a South Korean student, was detained by ICE agents after a routine immigration court visit in New York. The arrest of the 20-year-old, who was in the process of switching to a student visa, has sparked protests. Supporters are demanding her release, citing her positive influence and the circumstances surrounding her detention following a procedural hearing. Yeonsoo Go, a South Korean student, was detained by the US Immigration and Customs Enforcement (ICE) agents following a routine visit hearing at Federal Plaza Immigration Court. (Photo: Instagram) Yeonsoo Go, a South Korean student, was detained by the US Immigration and Customs Enforcement (ICE) agents following a routine visit hearing at Federal Plaza Immigration Court in New York, according to media reports. Go, 20, the daughter of local Episcopal priest Kyrie Kim, was arrested and placed in federal detention nearby and was eventually moved, like so many recent ICE detainees, to a facility in Louisiana, according to development comes as US President Donald Trump has vowed to launch the largest mass deportation operation in American history. As a part of the exercise, immigrants living in the US, both illegally and legally, including those with valid documentation such as green cards and visas, are being administration's deportation plan has led to intensified ICE raids nationwide, along with reports of arrests at immigration to CNN, Department of Homeland Security Assistant Secretary Tricia McLaughlin said that Go was arrested and placed in expedited removal proceedings after overstaying a visa 'that expired more than two years ago.' 'The fact of the matter is those who are in our country illegally have a choice—they can leave the country voluntarily or be arrested and deported,' McLaughlin said. Yeonsoo Go is a South Korean native and a Scarsdale High School graduate. She moved to the US from Seoul with her mother on a religious visa roughly four years ago. She was in the process of switching to a student visa. After completing her freshman year at Purdue University, where she's studying to become a pharmacist, Go returned home to Scarsdale in Westchester County to spend the summer with her mother. Go's mother, Rev. Kyrie Kim, serves with the Asian ministry of the Episcopal Diocese of New York and, according to the church, is the first woman ordained in the Seoul Diocese of the Anglican Church of Korea, as reported by to ABC7 NY, Go's lawyer stated that the 20-year-old was asked to appear in court on Thursday (July 31, 2025) for a procedural hearing on her visa renewal application. After the judge gave her a return date in October, ICE agents detained her as soon as she left the building. The arrest of the South Korean student over immigration issues triggered protests during the weekend, with around 75 faith leaders and advocates gathering outside 26 Federal Plaza on Saturday morning to demand their from the Episcopal Diocese of New York, the Interfaith Center of New York, and the New York Immigration Coalition called for Go's release on Saturday (August 2, 2025) during a gathering in Manhattan's Federal Plaza, where Go was held immediately after her arrest, according to Davis and the to CNN, the crowd of protesters prayed, sang songs, and marched with signs bearing the picture of the 20-year-old. Go's friends spoke about the positive influence she had on those around her.
Hindustan Times
6 hours ago
- Hindustan Times
Why was Yeonsoo Go arrested? All about South Korean student's ‘R-2 visa' and ‘immoral' ICE raids as protests erupt
Yeonsoo Go, the daughter of a pioneering Episcopal priest and a Purdue University student, was held and put under expedited repatriation procedures after her routine immigration court hearing. Yeonsoo Go is legally enrolled at Purdue University, stated her family and counsel, adding that her stay was lawfully prolonged in 2023. Why was Yeonsoo Go arrested? On July 31, US Immigration and Customs Enforcement (ICE) arrested 20-year-old Yeonsoo Go outside the federal courthouse at Federal Plaza in Manhattan. Go moved to the US from South Korea in 2021 on an R-2 (Temporary religious worker) visa with her mother. Go is legally enrolled at Purdue University, stated her family and counsel, adding that her stay was lawfully prolonged in 2023. Her next court appearance is set for October. The ICE action has sparked outrage among civil rights organizations, Korean American advocacy groups, and religious institutions, who have called her arrest 'unjust'. Also Read: Who is Los Angeles mass shooting suspect and what was the motive? All about Yeonsoo Go's R-2 visa The Department of Homeland Security claims that Go's visa terminated over two years ago, but her lawyer maintains that it is still in effect and will remain so until the end of this year. Rev. Kyrie Kim described the situation as 'incomprehensible' and stated that after years of fighting for immigrant rights, she never imagined her own daughter would be singled out. Meanwhile, advocacy organizations claimed that Go was detained by ICE agents without a warrant and that she was not allowed to speak with her attorney again. According to Episcopal leaders, the Manhattan ICE prison where she is being detained is unsuitable for human detention. The Episcopal Diocese of New York's bishop coadjutor, Rt. Rev. Matthew Heyd, stated that such arrests are not only 'illegal' but also 'immoral'. Faith leaders and her supporters have staged prayer vigils and protests outside ICE offices, demanding Go's release and denouncing what they say is an increasing trend of aggressive immigration enforcement against Korean people. Yeonsoo Go arrest: South Korean Ministry reacts as GoFundMe launched The South Korean Ministry of Foreign Affairs acknowledged that it has brought up the issue with US officials and is providing consular assistance. In order to help the family with legal costs, supporters have started a GoFundMe page and are calling for federal investigation into the matter.
Time of India
6 hours ago
- Time of India
Who is Yeonsoo Go? South Korean student and a priest's daughter detained by US immigration officials
Yeonsoo Go , a South Korean student, was detained by the US Immigration and Customs Enforcement (ICE) agents following a routine visit hearing at Federal Plaza Immigration Court in New York, according to media reports. Go, 20, the daughter of local Episcopal priest Kyrie Kim, was arrested and placed in federal detention nearby and was eventually moved, like so many recent ICE detainees, to a facility in Louisiana, according to CNN. The development comes as US President Donald Trump has vowed to launch the largest mass deportation operation in American history. As a part of the exercise, immigrants living in the US, both illegally and legally, including those with valid documentation such as green cards and visas, are being detained. Productivity Tool Zero to Hero in Microsoft Excel: Complete Excel guide By Metla Sudha Sekhar View Program Finance Introduction to Technical Analysis & Candlestick Theory By Dinesh Nagpal View Program Finance Financial Literacy i e Lets Crack the Billionaire Code By CA Rahul Gupta View Program Digital Marketing Digital Marketing Masterclass by Neil Patel By Neil Patel View Program Finance Technical Analysis Demystified- A Complete Guide to Trading By Kunal Patel View Program Productivity Tool Excel Essentials to Expert: Your Complete Guide By Study at home View Program Artificial Intelligence AI For Business Professionals Batch 2 By Ansh Mehra View Program The administration's deportation plan has led to intensified ICE raids nationwide, along with reports of arrests at immigration appointments. Speaking to CNN, Department of Homeland Security Assistant Secretary Tricia McLaughlin said that Go was arrested and placed in expedited removal proceedings after overstaying a visa 'that expired more than two years ago.' 'The fact of the matter is those who are in our country illegally have a choice—they can leave the country voluntarily or be arrested and deported,' McLaughlin said. Who is Yeonsoo Go? Live Events Yeonsoo Go is a South Korean native and a Scarsdale High School graduate. She moved to the US from Seoul with her mother on a religious visa roughly four years ago. She was in the process of switching to a student visa. After completing her freshman year at Purdue University, where she's studying to become a pharmacist, Go returned home to Scarsdale in Westchester County to spend the summer with her mother. Go's mother, Rev. Kyrie Kim, serves with the Asian ministry of the Episcopal Diocese of New York and, according to the church, is the first woman ordained in the Seoul Diocese of the Anglican Church of Korea, as reported by CNN. According to ABC7 NY, Go's lawyer stated that the 20-year-old was asked to appear in court on Thursday (July 31, 2025) for a procedural hearing on her visa renewal application. After the judge gave her a return date in October, ICE agents detained her as soon as she left the building. Go's arrest sparks protests The arrest of the South Korean student over immigration issues triggered protests during the weekend, with around 75 faith leaders and advocates gathering outside 26 Federal Plaza on Saturday morning to demand their release. Supporters from the Episcopal Diocese of New York, the Interfaith Center of New York, and the New York Immigration Coalition called for Go's release on Saturday (August 2, 2025) during a gathering in Manhattan's Federal Plaza, where Go was held immediately after her arrest, according to Davis and the diocese. According to CNN, the crowd of protesters prayed, sang songs, and marched with signs bearing the picture of the 20-year-old. Go's friends spoke about the positive influence she had on those around her.
