CTFs
This pages serves as a listing of my writeups and a record of the CTFs I’ve played. An actually complete version of my CTFTime profile, if you will.
Non-CTF writeups (for vulnerabilities found “in the wild”) are found on this other page. Writeups for perpetual competitions, if any, are available only through that competition’s system and not publicly.
2025
| Event | Team Size and Name | Position | Score | Start | Length |
|---|---|---|---|---|---|
| Hackfest CTF | 6, JDIS as “PlaceholderUS” | 12/55 | 5783/9110 | 2025-10-16 19:30 |
24 hours |
| TJCTF | 2, ECHRT | 136/723 | 4470/13219 | 2025-06-06 12:00 |
48 hours |
| NorthSec | 8, JDIS as “Exodus” | 29/92 | 98/228 | 2025-05-16 21:00 |
48 hours |
| PolyPwn | 4, “Snack Overflow” | 4/52 | 4267/7532 | 2025-03-29 10:00 |
10 hours |
| CS Games | 2, JDIS as “Azulus” | 2/22 | 64/76 | 2025-03-16 09:00 |
3 hours |
| @HACK | 4, “Snack Overflow” | 16/32 | 3600/9950 | 2025-03-01 13:00 |
25 hours |
| UofTCTF | 5, “PlaceholderName” | 49/897 | 2250/12792 | 2025-01-10 19:00 |
48 hours |
Hackfest CTF 2025:
- Team: Camil, Jean-Christophe S, Lea, Raphael B, Vincent B
UnitedCTF 2025 (as a challenge designer):
TJCTF 2025:
- Crypto: double-trouble, pseudo-secure
- pwn: buggy
- Team: Malori
NorthSec 2025:
PolyPwn 2025:
CS Games 2025:
- Reverse: PC From Scratch
- N.B. The CTF was only one part of the competition:
- The full team was 11 people; me and Julien C were selected for the CTF
- We got 2nd place at the CTF competition, the full team got 3rd place overall
@HACK 2025:
UofTCTF 2025:
2024
| Event | Team Size and Name | Position | Score | Start | Length |
|---|---|---|---|---|---|
| CyberSci | 5, JDIS as “Québec Mon PayUS” | 6/80 (2/15) | 4963/12581 (/9779) | 2024-11-23 12:00 |
4 hours |
| Hack The Vote | 2, Bit Loopy | 25/757 | 1008/4153 | 2024-11-01 19:00 |
48 hours |
| HeroCTF | 2, Bit Loopy | 30/670 | 3415/9681 | 2024-10-25 15:00 |
50 hours |
| DEADFACE CTF | 3, Bit Loopy | 29/1215 | 5948/12398 | 2024-10-18 10:00 |
34 hours |
| Hackfest CTF | 6, JDIS as ''.join(map(chr, [0x6A, 0x64, 0x69, 0x73])) |
7/35 (Classic) | 3185/6735 | 2024-10-10 21:45 |
24 hours |
| ULCTF | 1, N/A | 18/73 | ? | 2024-05-03 19:00 |
29 hours |
| 24@CTF | 1, N/A | 8/204 | 5626/8770 | 2024-04-06 12:00 |
24 hours |
| CursedCTF | 4, “can we make retri0d [sic] cry” | 80/11058 | 2825/19062 | 2024-03-29 20:00 |
72-ish hours |
CyberSci 2024:
- Crypto: candidate_registry, parts
- Team: Camil, Julien C, Lea, Sébastien G
- Patenthesized positions and score in the table are regional position and score for the top team in the Montréal region.
Hack The Vote 2024:
- Sandbox: small snake
- Team: Sean Valley
HeroCTF 2024:
- Crypto: Halloween, State
- Team: Sean Valley
DEADFACE CTF 2024:
- Crypto: Cogs in the Machine, Discreet Logging
- Team: Sean Valley
Hackfest CTF 2024:
- Reverse: Bad App/Bad Daemon
- Team: Justin Q, Lea, Pascal-E L, Romain L, Sébastien G
UnitedCTF 2024 (as a challenge designer):
- Crypto: MagicoMath
- Reverse: Security through obskurity
If you’re a team member and would like your name or link to be changed/removed/pseudonymized, contact me and I’ll gladly do any modifications.
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