Mid-Year Report 2026: Emerging Malware in the Threat Landscape

Between January and June 2026, multiple incidents confirm that ransomware and ICS-targeted attacks on OT environments continue to escalate. Rising geopolitical tensions have driven a sharp increase in cyberattacks, from an Iranian campaign that disrupted a U.S. medical technology company's manufacturing operations to a wave of incidents reported across Israeli critical infrastructure and small and medium-sized businesses. Ransomware groups such as Qilin have also shifted tactics, scanning broad sets of targets across industries rather than selecting victims individually. Meanwhile, ZionSiphon has emerged as new ICS-targeting malware, underscoring the growing risk this category poses to OT environments.

The threat intelligence research team at TXOne Networks has analyzed these developments and compiled their findings in this publication, which includes:

1. An up-to-date overview of the global cyber threat landscape as of June 2026, highlighting how threat actor adaptability demands stronger cyber defenses for OT environments in critical infrastructure.
2. An in-depth analysis of ZionSiphon, ICS malware built to target operational technology directly.
3. A breakdown of the two most active ransomware groups of the period, Qilin and The Gentlemen, including their evasion tactics and attack techniques.

Newly developed ICS malware and ransomware variants often lack clear indicators prior to discovery. Defense must rely on understanding threat actor TTPs and implementing multi-layered protection to mitigate potential impact.