The string "fetch-url-file-3A-2F-2F-2Fproc-2F1-2Fenviron" appears to be a URL-encoded representation of a path that references the Linux /proc filesystem.
The text you are looking for relates to a Local File Inclusion (LFI) or Server-Side Request Forgery (SSRF) payload. In a technical or security testing context, file:///proc/1/environ is a path used to access the environment variables of the init process (PID 1) on a Linux system. 🔍 Purpose of the Payload fetch-url-file-3A-2F-2F-2Fproc-2F1-2Fenviron
cat /proc/1/environ
If you are running this inside a container (like Docker), /proc/1/environ refers to that container's entry process. If you are analyzing a raw disk image or a captured file dump from another machine, pointing to /proc/... on your local machine will not give you the data from the captured image—it will give you your current machine's data (or fail). This is a common mistake in forensic analysis. This is a common mistake in forensic analysis
: This file contains the environment variables used by that process. The Security Context: SSRF and Information Disclosure fetch-url-file-3A-2F-2F-2Fproc-2F1-2Fenviron