| Step | Action | Tool / Command | Observation | |------|--------|----------------|-------------| | 1 | Open the landing page. | Browser / curl | Simple HTML + JS. | | 2 | Examine the JS file. | curl -s …/app.js | AJAX request to /api/content?ver= . | | 3 | Try common version strings ( dev , prod , test ). | curl -s “…?ver=dev” | Returns 404 . | | 4 | Follow the hint “best”. | curl -s “…?ver=best” | Returns a Base64 string. | | 5 | Decode Base64 (once). | base64 -d | Still looks like Base64. | | 6 | Decode again. | base64 -d (second time) | GZIP header appears. | | 7 | Decompress gzip. | gunzip -c | Flag appears in clear text. | | 8 | Submit flag. | ./submit FLAG… | ✔️ 400 points. |
payload.bin is 132 bytes long and begins with the ASCII string SGVsbG8= – which is again Base64. In fact the entire file appears to be . sxyprncom best
If you’re looking for a sleek, reliable platform with good live‑cam options and are okay with a modest subscription fee, sxyprncom best is a solid choice. | Step | Action | Tool / Command
$ gunzip -c payload2.bin