Trojan and Phishing Dominate Korean Phishing Email Attachments in April 2026

In April 2026, Trojan malware accounted for 47% of phishing email attachments in South Korea, followed by phishing payloads at 39%, according to ASEC analysis. Attackers used social engineering lures like fake tax invoices and logistics notifications, with Trojans often delivered via double-extension files and phishing via HTML spoofs. The share of phishing malware rose from 21% to 39% month-over-month. Read more

How to Build a Weekly East Asia Cyber Risk Brief for Executives Using Nogosee Tracker

This practical workflow guides security teams in creating a concise, actionable weekly executive brief from the Nogosee East Asia Cyber & AI Risk Tracker. It outlines signal selection, regional and sector grouping, writing standards, ownership, escalation triggers, and next steps—without requiring breaking news or U.S.-centric impact. Read more

Research Digest: Thai Personal Data Exposure Study Finds 1.2 Million National ID Records Indexed Online

A research paper reports that more than 1.2 million Thai National Identification Numbers were exposed through pages indexed by search engines. This Nogosee research digest translates the paper abstract into English context, links the full paper, and explains the operational relevance for privacy, identity, government web governance, and East Asia risk monitoring. Read more

Japanese Automaker Data Breach and South Korean Steel Ransomware Attack Highlight East Asia Cyber Threats

In March 2026, a Japanese automaker suffered a personal data breach via unauthorized external access, while INC Ransom targeted a South Korean steel manufacturer in a ransomware attack. Simultaneously, the administrator of the LeakBase dark web forum was arrested in Russia. These incidents underscore ongoing cyber risks to manufacturing sectors in Japan and South Korea, with implications for supply chain security and threat actor infrastructure disruption. Read more

Iranian Cyber Campaign Targets South Korean Electronics Manufacturing for Intellectual Property Theft

A targeted cyber-espionage campaign attributed to the Iran-linked MuddyWater group successfully breached a major South Korean electronics manufacturer in early 2026. The operation utilized DLL sideloading and legitimate service abuse to conduct industrial reconnaissance and credential theft, signaling a shift toward more operationally mature and quiet attacks against high-value East Asian industrial targets. Read more