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948 B
948 B
+++ author = "Maik de Kruif" title = "Challenge 0 - AdventOfCTF" date = 2020-12-02T17:20:28+01:00 description = "Challenge 0 of AdventOfCTF." tags = [ "AdventOfCTF", "challenge", "ctf", "hacking" ] categories = [ "ctf", "hacking", ] +++
- Points: 1
Description
Do you remember the flag in the teaser website?
Solution
Use the Wayback Machine to get the teaser page. https://web.archive.org/web/20201112020839/https://adventofctf.com/
When taking a look at the source we find the following comment:
<!-- Ceasar worked on this you know. Tk9WSXtIRVlfMVNfVGgxU19AX0ZsYTk/fQ== -->
If we then use base64 to decode this string we get NOVI{HEY_1S_Th1S_@_Fla9?}.
> echo "Tk9WSXtIRVlfMVNfVGgxU19AX0ZsYTk/fQ==" | base64 -d
NOVI{HEY_1S_Th1S_@_Fla9?}
This flag can then be submitted for the challenge.