$ ctf42

Challenges

Category
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CTFtime weight
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Higher weight ≈ harder, more prestigious event.
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27 challenges in family ⊕ blockchain ✕ clear · browse all techniques

Challenge CTF Weight Category Has
WEB_3_Casino
#predictable-blockchain-rng
 KubSTU 2026 24.83 Blockchain files wu 1
Follow_The_Layer
#blockchain-transaction-tracing
 LYKNCTF 2026 – Forensics files wu 1
Open_World
#blockchain#ton#shared-state-abuse
 SekaiCTF 2026 79.25 Blockchain files wu 1
PP_Farming_2
#smart-contract#storage-collision
 SekaiCTF 2026 79.25 Blockchain files wu 1
The_Otter_Scrolls
#hardcoded-secret
 justCTF 2024 Quals 77.17 Blockchain files wu 3
World_of_Ottercraft
#move-state-machine
 justCTF 2024 Quals 77.17 Blockchain files wu 3
Murky_SEEPass
#smart-contract#merkle-proof#private-storage-read
 SEETF 2023 – Blockchain files wu 3
Pigeon_Bank
#smart-contract#reentrancy#flash-loan
 SEETF 2023 – Blockchain files wu 3
Blockchain_Play_for_Free
#solana#solang#storage-read
 SekaiCTF 2023 24.86 Misc files wu 2
Blockchain_Re_Remix
#smart-contract#arbitrary-storage-write
 SekaiCTF 2023 24.86 Misc files wu 3
baby-wallet
#smart-contract-logic-error
 corCTF 2023 36.97 Blockchain files wu 2
SecretAndEphemeral
#storage-reading
 DownUnderCTF 2022 – Blockchain files wu 1
solidarity
#solana-account-confusion#missing-signer-check
 corCTF 2022 24.92 Pwn files wu 1
Transfer
#blockchain-osint
 HeroCTF 2021 35.17 Crypto files wu 3
HackChain
#solidity#delegatecall#function-pointer-jump
 RCTF 2021 – Crypto files wu 1
Tons_of_Fun
#ton-smart-contract
 BuckeyeCTF 2025 – Misc files wu 1
Mafia_at_the_end_1
#pcap#irc#smart-contract#etherscan
 PwnMe 2025 Quals 24.95 Misc files wu 1
Mafia_at_the_end_2
#smart-contract#predictable-rng#storage-read
 PwnMe 2025 Quals 24.95 Misc files wu 1
deception
#ethereum-storage-read#private-variable-exposure
 CrewCTF 2023 20.33 Blockchain files wu 3
infinite
#smart-contract#token-economy-logic-flaw
 CrewCTF 2023 20.33 Blockchain files wu 3
Grains_of_Sand
#fee-on-transfer#erc20#smart-contract
 Paradigm 2023 25.00 Pwn files wu 3
Hopping_into_Place
#cross-chain-bridge#transfer-root-spoofing#smart-contract
 Paradigm 2023 25.00 Pwn files wu 3
Cairo_Reverse
#cairo-starknet-contract-reversing
 Balsn 2022 53.42 Blockchain files wu 1
Immutable
#metamorphic-contract
 LakeCTF 2022 Quals 23.96 Blockchain files wu 2
QuinEVM
#evm-quine
 LakeCTF 2022 Quals 23.96 Blockchain files wu 2
crackme.sol
#solidity-smart-contract-reversing#xor
 0x41414141 2021 – Crypto files wu 1
blink
#hardcoded-secret#static-analysis
 BSidesSF 2019 25.00 Misc files wu 3