CTF Archives
    GitHub
    All CTFs

    NahamCon

    7 editions·165 challenges·2020–2025

    View on GitHub
    2025202420232022-EU202220212020
    Average—/5Vote and rate each challenge below.

    2025

    20 challengesCTFtime

    crypto3

    Cookie_Encryption
    Cookie_Encryption_2
    Cryptoclock

    forensic1

    Puzzle_Pieces

    misc5

    Free_Flagsi
    Quartet
    Screenshot
    SSH_Key_Tester
    The_Martian

    osint1

    Taken_to_School

    pwn3

    Found_Memory
    Lost_Memory
    The_Jumps

    rev6

    Deflation_Gangster
    FlagsFlagsFlags
    Its_Locked
    Its_one_syscall_Michael
    Noi_Not_againi
    Whats_a_base_amongst_friends

    web1

    Talk_Tuah

    2024

    44 challengesCTFtime

    crypto4

    Blackjack
    Encryption_Server
    Magic_RSA
    Rigged_Lottery

    forensic4

    1337_Malware
    Breath_of_the_Wild
    LogJam
    Taking_Up_Residence

    malware2

    Brain_Melt_2
    Perfectly_Legit_Crypto_Casino

    misc20

    Author_aJohnHammond
    Base3200
    EICAR
    Hashes_on_Hashes_on_Hashes
    Macro_Madness_1_The_Breach
    Macro_Madness_3_The_Decryption
    My_Shop_Disaster
    QRRRRRRRR
    Ring_Cycle_1_Basics
    Ring_Cycle_2_Rhinegold
    Ring_Cycle_3_Valkyrie
    Ring_Cycle_4_Siegfried
    Ring_Cycle_5_Gotterdammerung
    Secret_Info
    SecureSurfer
    Thats_Not_My_Base
    The_Mission_Start_Here
    Twine
    Uriel
    WP_Elevator

    ml1

    Indicium

    mobile4

    Buggy_Jumper
    Fly_Away_1
    Guitar
    Kitty_Kitty_Bang_Bang

    pwn2

    Gopherflow_Returns
    So_Much_Cache

    rev6

    A_Locked_Box
    Breaking_Point
    I_Can_Run_That
    IPromise
    Taylors_First_Swift
    Whats_in_the_Box

    web1

    Hacker_Web_Store

    2023

    23 challengesCTFtime

    crypto6

    ForgeMe_1
    ForgeMe_2
    Just_One_More
    RSA_Intro
    RSA_Outro
    Signed_Jeopardy

    mobile5

    Fortune_Teller
    JNInjaspeak
    Nahamstagram
    Red_Light_Green_Light
    Wheres_Waldo

    pwn7

    All_Patched_Up
    Limitations
    Nahm_Nahm_Nahm
    Oboe
    Open_Sesame
    Web_Application_Firewall
    Weird_Cookie

    rev4

    Mayhem
    The_Sandbox
    ur_a_wizard
    writeright

    web1

    Transfer

    2022-EU

    18 challengesCTFtime

    blockchain6

    BrokenStorage
    eth_welcome
    jump
    merkle_heist
    nft_lottery
    proposal_unlock

    crypto3

    dont_hack_my_d
    rektcursion
    Shapeshifter

    mobile1

    GotAnyGames

    pwn3

    Hexploit
    LimitedResources
    WackyService

    rev3

    GoJargonGo
    padlock
    rick

    web2

    Byepass
    sigma

    2022

    27 challengesCTFtime

    crypto3

    Pee_Kay_See_Ess_7
    Unimod
    XORROX

    hw3

    Cereal
    Dweeno
    Garys_Sauce

    malware5

    Brain_Melt
    Fly_Swatter
    Free_Nitro
    Ottos_It
    USB_Drive

    mobile4

    Click_Me
    Mobilize
    OTP_Vault
    Secure_Notes

    pwn7

    Babiersteps
    Babysteps
    Detour
    Free_Real_Estate
    Reading_List
    Riscky
    Stackless

    rev3

    babyrev
    Kamikaze
    Time_Machine

    web2

    Flaskmetal_Alchemist
    Personnel

    2021

    25 challengesCTFtime

    crypto3

    DiceRoll
    eaxy
    Treasure

    mobile4

    Andra
    FerrisWheel
    Microscopium
    Resourceful

    pwn9

    EmptyRead
    Meddle
    Ret2basic
    RockPaperScissors
    Smol
    SomeReallyOrdinaryProgram
    SortIt
    TheList
    writeead

    warmup7

    Buzz
    ChickenWings
    EighthCircle
    esab64
    Pollex
    Shoelaces
    Veebee

    web2

    AgentTester
    CerealAndMilk

    2020

    8 challengesCTFtime

    misc8

    conveyor_belt
    dangerous
    free_willy
    leet_haxor
    ripe_reader
    saas
    shifts_ahoy
    syrup
    CTF Archivessource