This was possible due to what is known as a recursive call exploit. The attackers withdrew Ether from the DAO smart contract multiple times using the same DAO Tokens. The attack was possible because of an exploit found in the splitting function. A total of 3.6 million Ether (worth around $70 million at the time) was drained by the hacker in the first few hours. On June 18, 2016, members of the Ethereum community noticed that funds were being drained from the DAO and the overall ETH balance of the smart contract was going down. And it all happened in less than a day.ĥ. They acted in the same way as criminals who stole funds from vulnerable wallets - just not for themselves. Unknown fraudsters managed to change the ownership of wallets taking advantage of the vulnerability with multiple signatures.įirst, the theft was noticed by the developers of SwarmCity.įurther events deserve a place in history: “white hackers” returned the stolen funds and then protected other compromised accounts. On July 20, 2017, the hacker transferred 153,037 Ethers to $31 million from three very large wallets owned by SwarmCity, Edgeless Casino and Eternity. Ethereum hack, $31 mln ( ETH), July 20th, 2017 To fix the situation, Tether took action by which the hacker was unable to withdraw the stolen money to fiat or Bitcoin, but the panic led to a decrease in the value of Bitcoin. For the transaction, he used a Bitcoin address, which means that it was irreversible. On November 19, 2017, the attacker gained access to the main Tether wallet and withdrew $ 30.9 million in tokens. By depositing $1 in Tether, the user received 1 USD, which can be converted back into fiat. Tether created a digital currency called “US tokens” (USDT) - they could be used to trade real goods using Bitcoin, Litecoin, and Ether. Tether hack, $30.9 mln ( USDT), November 19th, 2017 Also, GateHub advises victims to make complaints to the relevant authorities of their jurisdiction. GateHub notes that it is still conducting an investigation and therefore cannot publish any official findings. XRP enthusiast Thomas Silkjær, who first noticed the suspicious activity, estimates that the hackers have stolen nearly $10 million worth of cryptocurrency (23,200,000 XRP), $5.5 million (13,100,000 XRP) of which has already been laundered through exchanges and mixer services. The incident was reported by GateHub in a preliminary statement on June 6. Hackers have compromised nearly 100 XRP Ledger wallets on cryptocurrency wallet service GateHub. GateHub hack, $9.5 mln ( XRP), June 1st, 2019 Obviously, the case is complicated by the fact that the hackers are outside the UK, and the investigation has to cooperate with law enforcement agencies in other countries. There are still no official reports of arrests in this case. Then the servers were redirected to a certain IP address that belongs to one of the providers of Germany. dat, and the DORNATA server, where the password was stored. The logs show that the attacker, under the account of Kodric, gained access to the server LNXSRVBTC, where he kept the wallet file. Kodric believed.īy installing a Trojan on Kodriс’s computer, hackers were able to obtain direct access to the hot wallet of the exchange. Skype attacker pretended to be an employee of the Association for Computing Machinery, convinced that his Frame thought to make an international honored society, which required some paperwork. Hackers' attempts were not limited to just one letter. The file came to the victim by email, allegedly on behalf of an employee of the Association for Computer Machinery, although in fact, as the investigation showed, the traces of the file lead deep into Tor. On December 11, 2014, the infected word document was opened on his machine by Bitstamp system administrator Luka Kodric, who had access to the exchange wallet. The attack continued for five weeks, during which hackers presented themselves as journalists, then headhunters.įinally, the attackers were lucky. Although Merlak did not suspect any wrong and has opened the “application form”, to any critical consequences, this did not open access to the funds of Bitstamp exchange. By opening the file, he downloaded the malware on his computer. To receive the tickets, he was asked to fill in a participant questionnaire by sending a file named “Punk Rock Holiday 2015 TICKET Form1.doc”. It was known that Merlak is interested in such music and even plays in a band. Then Damian Merlak, the CTO of the exchange, was offered free tickets to punk rock festival Punk Rock Holiday 2015 via Skype. The initiation of the attack fell on November 4, 2014. On January 4, 2015, the operational hot wallet of Bitstamp announced that it was hacked by an anonymous hacker and 19,000 Bitcoins (worth of $5 million) were lost. Bitstamp hack, $5.3 mln ( BTC), January 4th, 2015 In this article, we will try to remember all the major cryptocurrency thefts over the past 10 years.
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