Smart contracts on two EOS gambling platforms have been hacked in the last four days to the tune of more than a quarter of a million dollars, with another platform paying out $600,000 to one user in an unusual-looking jackpot which EOSBet insists was simply luck.
DEOSGames Hacked — $24,000 Stolen
The first and more minor hack occurred on Sept. 9 when a DEOSGames user named runningsnail went on what appeared to be quite the winning streak, with $1,000 payments made dozens of times. The user would deposit 10 EOS and then win the jackpot 30 seconds later, like clockwork, a suspiciously-automated process which can be seen here in the user’s eosflare account overview.
DEOSGames confirmed that its smart contract had been hacked, spinning the malicious exploit as “a good stress test” in a short statement released on social media.
EOSBet Hacked — $236,000 Stolen
Yesterday, /u/EOSBetCasino released a statement on Reddit explaining the nature and scale of a smart contract hack resulting in a major loss of funds.
“Dear EOSBet Community,
The hacker exploited a flaw in the code that allowed them to bypass the esio.token ->transfer function, which meant that their funds were not deposited to the smart contract. Whenever they lost, they didn’t have to pay, but if they won they would win real funds which could then be cashed out, essentially allowing them to gamble in a consequence-free casino dishing out free money.
The team posted the section of code that was vulnerable for inspection and went on to explain what had been changed and for what reason, a move that was met by praise from several of the users on Reddit. Others were not so forgiving, with one user mocking the skill of the team and the third-party auditors they claim to have hired in a section of the team statement, which read: