Proxy-url-file-3a-2f-2f-2f __link__ -

He traced it to a dark corner of the legacy intranet, a server labeled . No one remembered deploying it. No packets moved in or out. Yet the string reappeared every midnight, appended to a non-existent log file.

Many companies use "Secure Web Gateways" (like Zscaler or Blue Coat). When an employee tries to open a local HTML file or a help document, the security software may wrap the local path in a proxy URL to scan the content for malicious scripts before letting it execute in the browser. 3. Development Environments proxy-url-file-3A-2F-2F-2F

When decoded, that becomes: proxy-url-file:/// He traced it to a dark corner of