All posts by Nodulaire

Engeenering Student, France -

[Trend Micro 2015] [Misc – Crossword] Write Up

Description

We were given an empty crossword and a bunch of definition.

Once you fill in all the answers, list the first character of Across 3 to 24 and Down 1 to 22 in the above order.

Once you create a string, please generate its MD5 checksum, which is the flag of this challenge.
In the example above, the checksum would be 0d8014d00ea607c445b4a270af35a4d2

Please submit the flag in the format of TMCTF{<checksum>}.

Continue reading [Trend Micro 2015] [Misc – Crossword] Write Up

[MITRE STEM 2015] [Crypto 50 – Holy Krabby Patty, Mermaid Man!] Write Up

Description

We were given the following instructions :

Oh no! Mermaid Man has left his belt at the Krusty Krab. You fully intend to return the belt to him, but first you want to enjoy a Ceaser Salad. Because you don’t want to get any food on the belt, you set it next to you. After finishing the salad, you notice that the belt is now gone and replaced with a note. What does the note say?

With the next cipher :

C qogvi. Sio qogvi. By- mby- gy… qogvi. Qogvi; Qogvicha; Qy’ff bupy nbyy qogvi; Qogvilugu; Qogvifias; nby mnoxs iz Qogvi. Cn’m zclmn aluxy, Mjihayviv! GWU-UW56X5YU

Continue reading [MITRE STEM 2015] [Crypto 50 – Holy Krabby Patty, Mermaid Man!] Write Up