OSINT

• Fall of 2022 - 100
• Social Circles - 200 - Unsolved
• The Mysterious Building - 300

Fall of 2022

The challenge provides the domain acectf.tech, as well as a hint in the challenge description: “perfect time to relax and check my phone for her txts.”

A TXT record associated with the domain reveals the flag:

$ nslookup -q=txt acectf.tech
...
 
Non-authoritative answer:
acectf.tech     text = "v=spf1 include:_spf.mx.cloudflare.net ~all"
acectf.tech     text = "ACECTF{redacted}"

Social Circles - Unsolved

The challenge provides the YouTube user @AhjussiPlayz. On the page https://youtube.com/@AhjussiPlayz, there is one video.

Watching the video with English captions shows “Nothing to see here >:D” as a caption in the last seconds of the video. The other available caption language, Korean, shows a different message. Translated, this is “PS A big thanks to my good friend “wimebix884” who helped me make the intro. Meet the rising new singer and his new song!”

Incomplete

No further progress on this challenge was made prior to the end of the CTF.

Next steps would be to search social platforms for the username wimebix884, using, e.g., Sherlock or WhatsMyName.

The Mysterious Building

There is an image provided, showcasing a building with a prominent logo on the top, as well as a tower in the background.

Searching the tower on Google Lens reveals a possible match in the Pitampura TV Tower. Opening the location of this tower in Google Maps, there are only a few angles from which this picture could have been taken.

After finding the building with a logo matching that in the challenge image (link), the name of the building is still required to answer the challenge. A business visible at that address on Google Maps is “Talli Station NSP.” Searching this business lists the address as “PP Trade Centre, …, Pitampura, New Delhi, …”

The flag is thus ACECTF{pp_trade_centre}.