cryptohard

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duckerz

Task: File with 601 lines of 12-word BIP-39 mnemonics and a hint pointing to Nibiru blockchain. Solution: Derived EVM addresses from mnemonics, found active wallet on testnet-2, extracted flag from transaction calldata via Tendermint RPC.

$ ls tags/ techniques/
blockchainsecp256k1bip39nibirucosmos_sdkevmmnemonichd_walletkeccak256tendermint
bip39_mnemonic_to_walletbip32_hd_derivationevm_address_generationcosmos_tendermint_rpc_tx_searchevm_calldata_extraction
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