Something is not quite right if you look at the beatmap page... Did I forget to clean my footprint?
Note: This challenge ONLY requires you to inspect the mapset page (i.e. any stuff under https://osu.ppy.sh/beatmapsets/x/...). Do NOT interact with forum or post anything outside.
This is an OSINT challenge.
First, we'll need the beatmap from kaijuu/sanity-check.
- We are asked to find the author's "latest mapset on osu!".
- Go to sahuang's osu profile.
- His most recent beatmap is Kaijuu ni Naritai.
Next, we'll do OSINT on this beatmap page.
- Using the Wayback Machine on the beatmap info page, we'll find a saved page from October 25th.
- There doesn't seem to be anything special here.
- If we inspect the beatmap discussion page, we'll also find a saved page.
- This time, there's a now-deleted comment by sahuang:
||osu{we1c0me_t0_my_annual_mapset}||
Note: the archived pages were gone at the time this is written
Thus, we've retrieved the flag for kaijuu/cached.
Flag: osu{we1c0me_t0_my_annual_mapset}