Thursday , June 26 2025
SK Telecom

South Korea’s largest SK Telecom Hit by Malware: SIM-related info leaked

South Korea’s largest mobile operator, SK Telecom, is warning that a malware infection allowed threat actors to access sensitive USIM-related information for customers.

SK Telecom is the largest mobile network operator in South Korea, holding approximately 48.4% of the mobile phone service market in the country, corresponding to 34 million subscribers.

Citrix Released Emergency Patches for Actively Exploited CVE-2025-6543

Citrix has issued security updates for a critical vulnerability in NetScaler ADC that has been actively exploited. The vulnerability CVE-2025-6543...
Read More
Citrix Released Emergency Patches for Actively Exploited CVE-2025-6543

SonicWall warns of a trojanized NetExtender stealing VPN logins

SonicWall warned on Monday that unknown attackers have trojanized its SSL-VPN NetExtender application, tricking users into downloading it from fake...
Read More
SonicWall warns of a trojanized NetExtender stealing VPN logins

CVE-2025-36537
TeamViewer patched vuln allowing hacker SYSTEM Rights

A significant security vulnerability has been revealed in TeamViewer Remote Management for Windows, posing a risk of privilege escalation attacks....
Read More
CVE-2025-36537  TeamViewer patched vuln allowing hacker SYSTEM Rights

Hacker Target 70+ Microsoft Exchange Servers to Steal Credentials with Keyloggers

Unidentified hackers are targeting exposed Microsoft Exchange servers to inject harmful code into login pages and steal credentials. Positive Technologies...
Read More
Hacker Target 70+ Microsoft Exchange Servers to Steal Credentials with Keyloggers

WhatsApp banned on all US House of Representatives devices

The U.S. House of Representatives has banned congressional staff from using WhatsApp on government devices due to security concerns, as...
Read More
WhatsApp banned on all US House of Representatives devices

Kaspersky found “SparkKitty” Malware on Google Play, Apple App Store

Kaspersky found a new mobile malware dubbed SparkKitty in Google Play and Apple App Store apps, targeting Android and iOS....
Read More
Kaspersky found “SparkKitty” Malware on Google Play, Apple App Store

OWASP AI Testing Guide Launched to Uncover Vulns in AI Systems

OWASP has released its AI Testing Guide, a framework to help organizations find and fix vulnerabilities specific to AI systems....
Read More
OWASP AI Testing Guide Launched to Uncover Vulns in AI Systems

Axentec Launches Bangladesh’s First Locally Hosted Tier-4 Cloud Platform

In a major milestone for the country’s digital infrastructure, Axentec PLC has officially launched Axentec Cloud, Bangladesh’s first Tier-4 cloud...
Read More
Axentec Launches Bangladesh’s First Locally Hosted Tier-4 Cloud Platform

Hackers Bypass Gmail MFA With App-Specific Password Reuse

A hacking group reportedly linked to Russian government has been discovered using a new phishing method that bypasses two-factor authentication...
Read More
Hackers Bypass Gmail MFA With App-Specific Password Reuse

Russia detects first SuperCard malware attacks via NFC

Russian cybersecurity experts discovered the first local data theft attacks using a modified version of legitimate near field communication (NFC)...
Read More
Russia detects first SuperCard malware attacks via NFC

The company says they detected malware on their systems at 11 PM local time on Saturday, April 19, 2025, in a weekend cyberattack when most organizations are understaffed.

SK Telecom security notice reads, On April 19, 2025, at approximately 11:00 PM, SK Telecom discovered circumstances in which some SIM-related information of SK Telecom customers was suspected to have been leaked due to malware.

We are currently continuously investigating the exact cause, scale, and items of the leak, and in accordance with relevant laws, we immediately reported the breach to the Korea Internet & Security Agency (KISA) on Sunday, April 20. In addition, we reported the personal information leak to the Personal Information Protection Commission at 10:00 a.m. on Tuesday, April 22 and are actively cooperating with the related investigation.

SK Telecom immediately deleted the malware after recognizing the possibility of a leak, and also isolated the suspected hacking device. As of now, there have been no confirmed cases of actual exploitation of the information, but we are implementing the following measures to prevent damage to our customers.

• Complete system-wide investigation
• Strengthening blocking of illegal SIM card changes and abnormal authentication attempts
• Strengthening immediate suspension of use and guidance measures when suspicious signs of damage are found

For customers who want additional security measures along with customer notifications through the website, we are providing SIM card protection service (free of charge) through the website and T World.”

Check Also

internal systems

Canada 2nd largest airlines “WestJet” investigates cyberattack disrupting internal systems

WestJet, Canada’s second-largest airline, is looking into a cyberattack that has affected some internal systems …

Leave a Reply

Your email address will not be published. Required fields are marked *