The Wikimedia Foundation suffered a security incident today after a self-propagating JavaScript worm began vandalizing pages and modifying user scripts across multiple wikis.

Ransomware threat actors tracked as Velvet Tempest are using the ClickFix technique and legitimate Windows utilities to deploy the DonutLoader malware and the CastleRAT backdoor.

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Dubbed InstallFix by Push Security, the scheme inserts instructions to download malware during the Claude Code install process on cloned websites.