Hexpresso FIC Quals 2019

The FIC (Forum International de la Cybersécurité) is an event that takes place in Lille, France every year. This year, the French CTF team Hexpresso organizes the CTF. These guys have a pretty strong high fun/low guessing policy so I thought I will compete with my friends from Team Ropkek.

Turned out we did pretty well as we were the first team to finish the qualification round and secure a slot for the finals.

step1   -> [uniq hit : 1016]
step2   -> [uniq hit : 661]
step3   -> [uniq hit : 527]
step4   -> [uniq hit : 342]
step5   -> [uniq hit : 236]
step6   -> [uniq hit : 229]
step7   -> [uniq hit : 179]
FINAL   -> [uniq hit : 16]

[step6 re time] -> 0,017609 seconds

+---------------------------------[FINISHER]---------------------------------+
| 00/ XeR (but won't compete)                                                |
| 01/ Geluchat (but won't compete)                                           |
+----------------------------------------------------------------------------+
| [+] 6 qualified teams                                                      |
|  1/ ROPKEK       : @geographeur    @ShiroPycatchown    @plean702           |
|  2/ Synacktiv    : @dzetalol       @l4x4               @swapgs             |
|  3/ mfb1x        : @stan1slas         ???                ???               |
|  4/ AlterDS      : @faridtsl          ???                ???               |
|  5/ DingDing     : @pix               ???                ???               |
|  6/ Heap  ouRA   : @bestpig        @_Aresia_             ???               |
|  7/ BeMoJo       : benoit          Mohammed             Johan              |
|  8/ MyFICinaBox  : @G4N4P4T1          ???                ???               |
|  9/   ???        : Jerome             ???                ???               |
| 10/ 7h4l1um      : @whitehat42     @Nainphomane          ???               |
| 11/    -         :      -              -                  -                |
| 12/    -         :      -              -                  -                |
| 13/    -         :      -              -                  -                |
| 14/    -         :      -              -                  -                |
+----------------------------------------------------------------------------+

Well, technically, XeR was first but he won't compete the finals and I want to flex.

Here are my writeups:

If you are interested in step 7 (a Use After Free, definitely the hardest challenge of this qualification round), please take a look at this blogpost written by my teammate Shiro.

I'm excited for the finals. The other teams look very musclées so I'm scared but its ok.

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