cybersecurity

• Check Point Research (CPR) discovered a new campaign conducted by the APT group Stealth Falcon. The attack used a .url file that exploited a zero-day vulnerability (CVE-2025-33053) to execute malware from an actor-controlled WebDAV server. CVE-2025-33053 allows remote code execution through manipulation of the working directory. Following CPR’s responsible disclosure, Microsoft today, June 10, 2025, released a patch as part of their June Patch Tuesday updates.
• Stealth Falcon’s activities are largely focused on the Middle East and Africa, with high-profile targets in the government and defense sectors observed in Turkey, Qatar, Egypt, and Yemen.
• Stealth Falcon continues to use spear-phishing emails as an infection method, often including links or attachments that utilize WebDAV and LOLBins to deploy malware.
• Stealth Falcon deploys custom implants based on open-source red team framework Mythic, which are either derived from existing agents or a private variant we dubbed Horus Agent. The customization not only introduce anti-analysis and anti-detection measures but also validate target systems before ultimately delivering more advanced payloads.
• In addition, the threat group employs multiple previously undisclosed custom payloads and modules, including keyloggers, passive backdoors, and a DC Credential Dumper.