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    BackdoorCTF

    5 editions·156 challenges·2019–2025

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    20252024202320222019
    Average—/5Vote and rate each challenge below.

    2025

    43 challengesCTFtime

    crypto8

    Ambystoma_Mexicanum
    Ambystoma_Mexicanum_Revenge
    bolt_fast
    bread_vs_keys_v1
    lcg_2
    m4candch3353
    p34kC0nj3c7ur3
    The_Job

    forensic6

    Complete_Chaos
    exp_golomb
    Fractonacci
    Kiidddoooo
    Sonic
    Terrific_Transformer

    misc3

    404_Friend_Not_Found
    Mizuhashi_Simple_Domain
    Title_Decider

    pwn9

    Aladdin_ka_Chirag
    Devils_Convergence
    Gamble
    Lolimancer
    Makeine
    Santas_Workshop
    skernel
    The_Last_Duel
    vibe_kode

    rev10

    Backdoor
    Easy_Crackme
    Infinity
    mazerunner
    Not_so_easy
    SIMD_Highway
    The_Stage
    To_jmp_or_not_jmp
    Vault
    Where_code

    web7

    Flask_of_Cookies
    Go_Touch_Grass
    Image_Gallery
    MarketFlow
    MCP_Mayhem
    Shop_of_life
    Trust_Issues

    2024

    35 challengesCTFtime

    blockchain4

    Betray_your_master
    Curvy_Pool
    EasyPeasyLemonSqueezy
    Puffer_Mint

    crypto7

    A_Complex_Shamir
    AESwap
    Crazy
    Hashing_Frenzy
    I_Like_McDonalds
    Secure_Nonsense
    Time_to_Break_Up

    forensic5

    American_Spy
    Cursed_Credential
    My_bosss_bosss_boss
    Roman_Xor.png
    Torrent_Tempest

    misc2

    Decompressor
    Multi_Image

    pwn5

    Dragons_Shield
    Happy_Golfing
    Kuwu
    Merry_Christmas
    V8box

    rev7

    Annoying
    Between_Two_Worlds
    GoBlind
    Impossible...Right
    Mario_lite
    Ratatouille
    Wabi_Sabi

    web5

    Cascade_Chaos
    Cascade_Chaos_Revenge
    Christmas_Cookie
    Juggernaut
    Sand_Notes

    2023

    43 challengesCTFtime

    blockchain2

    BabyBlackjack
    VulnChain

    crypto9

    ColL3g10n
    Curvy_Curves
    Knapsack
    ProveMeWrong
    PRSA
    Rebellious
    Safe_Curvy_Curve
    Secure_Matrix_Transmissions
    Secure_Matrix_Transmissions_v2

    forensic3

    Drunk
    Forenscript
    Sonic_Hide_and_Seek

    misc13

    Beginner_menace
    Cheat_Code
    Escape_The_Room
    Fruit_Basket
    halo_jack_again
    Headache
    Indecipherable_image_or_is_itq
    Marks
    mini_RSA
    mini_RSA_v2
    Not_So_Guessy
    secret_of_j4ck4l
    Something_in_Common

    pwn6

    Baby_Formatter
    EmpDB
    Konsolidator
    Master_Formatter
    Master_Formatter_v2
    Pizzeria

    rev7

    baby_eBPF
    Blowcode
    Gotta_Go_Fast
    Hiashi_of_the_shades
    Open_Sesame
    Secret_Door
    Sl4ydroid

    web3

    armoured_notes
    php_sucks
    too_many_admins

    2022

    14 challengesCTFtime

    crypto4

    Fishy
    Morph
    RandomNonsense
    WhatTheCure

    pwn4

    babystl
    HouseofMagic
    susalloc
    toddlerVM

    rev3

    5p4gh3tt1
    MazeRunner2.0
    YameteKudasai

    web3

    circles
    fl4sh
    S3KSU4L_INJ3C710N

    2019

    21 challengesCTFtime

    misc21

    Baby_Heap
    Baby_Tcache
    BabyROP
    bossfight
    ECHO
    EntertheMatrix
    FUNSIGNALS
    I-GOT-BEEF
    MiscPwn
    PWN-EASY
    Reallocator
    SHELTER
    TEAM
    Weekly1Challenge1
    Weekly1Challenge2
    Weekly1Challenge3
    Weekly1Challenge4
    Weekly3Challenge1
    Weekly3Challenge2
    Weekly3Challenge3
    Weekly3Challenge4
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