Ethereum Yield Hack

The project was holding token sales using 2 smart contracts:

https://etherscan.io/address/0x052cd742…f6bf5b#internaltx

https://etherscan.io/address/0x28a34597…553203#internaltx

The major and final Ether recipient, raised on the presale, was the Ethereum Yield deployer:

https://etherscan.io/tx/0xd4f0e4fd…d76450

https://etherscan.io/tx/0xbc4d09d8…8a4c01

https://etherscan.io/tx/0x45f56a33…f29e96

In total, the Ethereum Yield deployer received 3,100 ETH.

The contract deployer used 700 ETH to add the initial liquidity into the ETH / ETHY pair:

https://etherscan.io/tx/0x3a0f9586…fb75ce

This liquidity was locked till 01.01.2100 at:

https://etherscan.io/tx/0xaa6aab75…77a36b

The contract deployer used 1,000 ETH to add the initial liquidity into the ETH / ETHYS pair:

https://etherscan.io/tx/0xfed11e4b…0b0082

However, the liquidity wasn't locked and the contract deployer removed it multiple times at:

https://etherscan.io/tx/0xc9fe6fd4…b1dfd7

https://etherscan.io/tx/0x62d4cb45…91a7b5

https://etherscan.io/tx/0xf99ad612…8f1cfc

https://etherscan.io/tx/0x747add9e…fe8eb2

https://etherscan.io/tx/0xb55fb485…c3a77d

https://etherscan.io/tx/0x5eda7b6a…b004d1

https://etherscan.io/tx/0x0e09397f…bd80b7

The last pinned message in the official Telegram group says that the owner and developer left the team:

https://archive.is/fSGYW