Statistics on Attachment Threat Types in April 2026, the most common threat in phishing email attachments was Trojan (47%). this type was distributed by disguising itself with a double extension or a legitimate file name to trick the user into executing it and installing malware on the system. they continued to spread through multiple variants […]

Purpose and Scope this report summarizes ransomware-related statistics based on Dedicated Leak Sites (DLS) (ransomware PR sites or PR pages) and Quantity of ransomware damaged systems identified during the month of April 2026. it also provides major ransomware issues in Korea and abroad and Damage Trends by Industry/Region. Key Statistics ransomware Sample Quantity and Damage […]

Notes the April 2026 Dark Web Breach Incident Trend Report is compiled from data breach cases posted on the deep web and dark web forums. some information is included in cases where it is difficult to fully verify the factuality of the information due to the nature of the source. Major Issues data breaches and […]

Notes the April 2026 Dark Web Issue Trend Report summarizes the Major Issues that occurred on the deep web and dark web. due to the nature of the sources, some of the information is difficult to fully verify. Major Issues BreachForums continued its relaunch with a new domain and repeated operational update announcements. at the […]

Notes the April 2026 Dark Web Threat Actor Trend Report summarizes trends in hacktivists and threat actors operating on the deep web and dark web. due to the nature of the sources, some of the information is difficult to fully verify as factual. Major Issues NoName05716 claimed repeated DDoS attacks against dozens of organizations, including […]

ASEC Blog publishes Ransom & Dark Web Issues Week 1, May 2026         Guatemalan Government Agency Data Sold on DarkForums BlackWater Ransomware Attack Targets Chinese Auto Parts Manufacturer Japanese Fintech Firm Suffers Unauthorized GitHub Access

ASEC Blog publishes Ransom & Dark Web Issues Week 5, April 2026           Emergence of a new ransomware group, M3RX Data from a South Korean religious organization sold on DarkForums ShinyHunters claims a data leak from a US interactive media company

ASEC Blog publishes Ransom & Dark Web Issues Week 4, April 2026           ShinyHunters Claims Data Breach Involving Major U.S. Convenience Store Chain ShinyHunters Claims Theft of Internal Data and Source Code from U.S. Software Development Firm Emergence of New Data Extortion Group: Prinz Eugen

Statistics on Attachment Threats Types. trojans accounted for the largest share of attachment-based threats in March 2026 at 21%. phishing (FakePage) came in at 15%, with a significant month-over-month decrease in share from 42% to 15%, but a slight decrease in volume. downloaders were identified at 9% and droppers at 7%. trojans continue to circulate […]

Overview ahnLab monitored APT attacks against domestic targets during the month of March 2026. most of the attacks were launched through Spear Phishing emails sent after reconnaissance of specific targets. APT Attack Trends in Korea the majority of distribution vectors were shortcut (.lnk) files, with LNK-based attacks dominating. Type A is to run PowerShell with […]

Purpose and Scope. this report analyzes the strategies, techniques, and impacts of APT groups believed to be state-sponsored. it excludes financial crimes groups from its scope and organizes major threat behaviors by ATIP’s representative names. the activities of 13 APT groups were aggregated based on publicly available data for the most recent month. Leading APT […]

Content. a number of malware samples including phishing, web shell, droppers, backdoor malware, downloaders, Infostealer, and CoinMiner targeting the financial sector have been distributed. we observed a number of cases where Korean disguised attachment names and HTML/JS execution methods were utilized to propagate phishing. account compromise campaigns through the Telegram API were confirmed, with approximately […]

ASEC Blog publishes Ransom & Dark Web Issues Week 3, April 2026           Emergence of New Ransomware Groups: TiMC, BlackWater, and Lamashtu [1], [2], [3] NoName05716 Claims DDoS Attacks on South Korean Public & Private Sectors [1], [2], [3] VECT & TeamPCP Campaign: Supply Chain Attack Exploiting Global Travel Platform

Purpose and Scope. this report summarizes the number of ransomware samples, number of affected systems, DLS-based statistics, and major Korean & Global ransomware issues identified during the month of March 2026. Key statistics. ransomware sample counts and victimized systems statistics were aggregated by detection name assigned by AhnLab. statistics on targeted businesses were calculated based […]

Alert this report is a summary of deep web and dark web source-based material and contains some facts that cannot be fully verified due to the nature of the sources. Major Issues BreachForums’ internal collapse and attempts to rebuild were observed. trust was undermined by the betrayal of moderators and the movement of funds, and […]

Alerts this report is a compilation of trends centered on hacktivists operating on the deep web and dark web. some alleged attacks are labeled as observations due to limited independent technical verification. Major Issues Handala’s multi-pronged offensive stood out. The group used a combination of psychological warfare and subversive attacks, including a claimed FBI-linked domain […]

Alerts this report is based on reports of data breaches and the sale of initial access rights posted on deep web-dark web forums. some parts of the report contain information that cannot be fully verified as factual due to the nature of the source. Major Issues Multiple breach claims by ShinyHunters. a wide range of […]

Description. analysis of ASEC’s ASD logs for Q1 2026 showed a consistent trend of attacks against MS-SQL and MySQL. the number of attacks tended to decrease temporarily in February before increasing again in March. Purpose and Scope. this report summarizes the statistics of attacks targeting MS-SQL and MySQL servers installed on Windows and the malware […]

Description. AhnLab SEcurity intelligence Center (ASEC) analyzed the attack status and malware statistics of Windows web servers in the first quarter of 2026 based on AhnLab Smart Defense (ASD) logs. the analysis covers Internet Information Services (IIS) and Apache Tomcat web servers in Windows environments. command execution through the web shell is the main path […]

Overview. ASEC analyzed the statistics of attacks against Linux SSH servers in Q1 2026 based on honeypot logs. The P2PInfect worm dominated, accounting for 70.3% of all attack sources, and DDoS bots such as Mirai, XMRig, Prometei, and CoinMiner were identified as the main threats. Purpose and Scope. the purpose of this report is to […]