Ether.li Multisig Wallet – Recovery Request

I am trying to recover funds from an old Ether.li multisig wallet created around 2016–2017. The wallet address is a smart contract and not a normal Ethereum wallet. The contract address is 0x8c67F583ada86E93784BECA8C70c98d33601e12D. According to Etherscan, the contract still holds approximately 1.97 ETH, which is clearly visible on-chain.

I only have access to one private key, which corresponds to the externally owned account 0x2Afa1bDC70E5b257Bc2cd49B07f6715b2e850168. With this key I am able to access the wallet, fund gas, and sign transactions. I do not have access to any additional private keys, recovery keys, JSON or keystore files, browser backups, or other devices that may have been used at the time.

Using MyEtherWallet, I interacted directly with the contract and executed the withdraw() function with method ID 0x3ccfd60b. The transaction was successfully mined and confirmed on Ethereum, gas was consumed, and the transaction status shows success. However, no ETH was transferred, no internal transaction occurred, and the balance of the contract remained unchanged.

When reviewing the contract events on Etherscan, I can see ConfirmationNeeded and Confirmation events, but no Execution event. Based on my understanding, this matches the behavior of a Parity or Ether.li multisig wallet, where a single confirmation is not sufficient and execution only happens once the required number of owner signatures is reached. This strongly suggests that the wallet is not a 1-of-1 multisig and requires at least two signatures.

At the moment, the ETH clearly exists on-chain and the contract logic appears to be working as designed. I am able to submit confirmations using my key, but I cannot trigger execution or move the funds with only one key. This means the funds appear to be locked due to missing additional owner signatures.

I am looking for expert help to clarify whether the exact multisig configuration, including owners and required signatures, can be reconstructed from the contract bytecode and storage. I would also like to know whether there are any known Ether.li-specific recovery methods if only one key is available, and whether it is realistic that a second owner key could exist in an encrypted or legacy format that might still be recoverable. Finally, based on your experience, I would appreciate an honest assessment of whether recovery is possible in this case or definitively impossible without another key.

This wallet was created through the Ether.li web interface, which at the time abstracted away the multisig complexity. I was never clearly informed that multiple independent keys would be required long-term, and the service was later shut down without a clear migration path. Any help or guidance would be greatly appreciated.