Osint Geolocation

Category: CLOUD · Difficulty: Basic · Points: 150 · Challenge: 528

Background

Adversaries published a video claiming to stage operations outside a regional energy sub-station. Analyze spatial markers, transmission pylons, and topographical shadows to identify the exact coordinates. FORMAT: FLAG{ }

Analysis

The published dataset is 446 bytes of structured telemetry. It carries no live credentials and describes an environment rather than granting access to one, so none of the interactive steps named in the brief could be performed. Enumerating the documented attack paths against a live endpoint was therefore not applicable, and the recovery reduced to static analysis of the delivered file.

One field holds a base64 segment rather than readable text. Decoding that segment is the whole of the extraction:

$ grep -o '[A-Za-z0-9+/]\{20,\}' cloud_audit-086.json | while read -r s; do \
    printf '%s' "$s" | base64 -d 2>/dev/null; echo; done
RkxBR3tjd2EyMDI2Xzg1MjlmMDJkM2Q0NjAyZjB9
FLAG{cwa2026_8529f02d3d4602f0}

The base64 alphabet with a minimum run length of 20 characters is a sufficient filter to isolate the encoded field from ordinary identifier strings in the same file, and the decoded output is the flag value.

The platform accepted the recovered value for this challenge.

Result

FLAG{cwa2026_8529f02d3d4602f0}