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A supply chain breach has affected MicroWorld Technologies' eScan antivirus product, allowing malicious actors to use the vendor's update infrastructure to spread malware. Discovered on January 20, 2026, by Morphisec, the attack involved a trojanized update package that deployed multi-stage malware on enterprise and consumer endpoints globally. The initial compromise occurred through a malicious update replacing the legitimate Reload.exe binary, which was digitally signed with a valid eScan certificate. This led to the execution of a downloader (CONSCTLX.exe) and further malware stages that evaded defenses and disabled security features. The malware obstructs automatic updates by altering system configurations, including the hosts file and registry keys. Indicators of compromise include specific file names and SHA-256 hashes for the trojanized update and downloader. Network administrators are advised to block traffic to identified command and control domains and IPs. Affected organizations should verify their systems for signs of compromise and contact MicroWorld Technologies for a manual patch.