medium.com/tag/ctf-writeup· Sep 29, 2026· by Paul Kriukov

Reading an APT’s Group Chat: An XMPP Threat-Intel Investigation

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An evidence-driven walkthrough of a live chat server — service discovery, message archives, hidden rooms, an encrypted command channel… Continue reading on Medium »
🎯 Vulnerability: Web Security Vulnerability
💡 Defense Fix: Implement strict input validation, contextual output encoding, and enforce least-privilege authorization controls.
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