1755 hack event(s)
Description of the event: Bitcoin Gold was 51% attacked by an unknown attacker. This type of attack allows an attacker to manipulate the blockchain ledger that records transactions. During the attack, 388,000 BTG (worth approximately US$18 million) was stolen from several cryptocurrency exchanges. After the team refused to help pay for some of the losses, Bitcoin Gold was subsequently delisted from Bittrex.
Amount of loss: 388,201 BTG Attack method: 51% attack
Description of the event: SmartMesh has a significant security like BEC.
Amount of loss: $ 140,000,000 Attack method: Overflow
Description of the event: After logging in to the website for 10s, the user's wallet is emptied, the hacker hijacks the DNS server, and the user logs in to MyEtherWallet to force a redirect to the malicious website. The user was forced to redirect to a malicious website when logging in to MyEtherWallet.
Amount of loss: $ 13,000,000 Attack method: DNS hijacking
Description of the event: Hacker exploited the data overflow to attack the smart contract of BeautyChain, successfully transferred the BEC token to the two addresses resulted in the massive BEC being sold in the market, and the value of the digital currency was almost zero, which brought a crushing blow to BEC market.
Amount of loss: $ 1,000,000,000 Attack method: Overflow
Description of the event: A failed cold storage restoration exercise seems to have exposed private keys intended for offline storage (effectively making them online). However, the CEO has expressed an insider’s involvement. Police found private keys exposed online for more than 12 hours.
Amount of loss: 438 BTC Attack method: Private Key Leakage
Description of the event: The Verge network was attacked by 51% for the first time. According to Bitcointalk forum user ocminer, a malicious miner can use forged timestamps to mine blocks, thereby tricking the network into thinking that the new block was mined one hour ago, so that when the next mined block is immediately added to the network, it also added to the blockchain. This allowed the attacker to mine one block per second, which is said to have mined 250,000 XVG.
Amount of loss: 250,000 XVG Attack method: 51% attack
Description of the event: The attacker has a large amount of computing power to launch 51% attack
Amount of loss: - Attack method: 51% attack
Description of the event: Binance security incident occurred in March 2018 when a phishing campaign impacted a large number of Binance users. At the time, Binance offered a $250,000 reward for any information that would have led to the arrest of those involved in the phishing campaign.
Amount of loss: - Attack method: Unknown
Description of the event: A hacking organization in Ukraine has stolen cryptocurrencies worth more than $50 million from the Blockchain.info by purchasing keyword advertisements related to cryptocurrencies in the Google search engine and masquerading as malicious websites of legitimate websites.
Amount of loss: $ 50,000,000 Attack method: Phishing attack
Description of the event: BitGrail claims that $195 million of customers have stolen cryptocurrencies in Nano (XRB).
Amount of loss: 195,000,000 USD Attack method: Unknown
Description of the event: Unidentified assailants stole 523 million NEM coins (about $534 million) from the exchange's hot wallet. According to Coincheck, NEM coins are kept on a single-signature hot wallet instead of a more secure multi-signature wallet, and the stolen coins are confirmed to be Coincheck customers.
Amount of loss: 534,000,000 USD Attack method: Wallet Stolen
Description of the event: User orbit84 posted on Reddit that a hacker entered his hosting provider account and changed the DNS settings to his own hosted version of BlackWallet. The attacker's wallet seems to have accumulated about $400,000 worth of cryptocurrency, and its market value has almost tripled in the past month. In a statement, the founder of BlackWallet claimed that the open source online "star wallet" BlackWallet had been hacked.
Amount of loss: $ 400,000 Attack method: DNS hijacking
Description of the event: In the wee hours of December 19, Youbit was dealt a death blow in the form of another hack. The exchange, which was also hit in April, is closing down in the fallout of the most recent attack. As revealed on its website, they had been forced to terminate its services after suffering another hack. The hackers ran off with 17% of Youbit’s funds, enough to drive the exchange into bankruptcy.
Amount of loss: - Attack method: Unknown
Description of the event: Nicehash appears to have shuttered their website with a notice saying “a security breach involving NiceHash website” and “our payment system was compromised and the contents of the NiceHash Bitcoin wallet have been stolen”.
Amount of loss: 4,736.42 BTC Attack method: Unknown
Description of the event: Tether, the issuer of USDT, issued a statement stating that its system was hacked by an external attacker on the 19th of this month and stolen USDT tokens worth approximately $31 million from its Tether Treasury wallet.
Amount of loss: 31,000,000 USD Attack method: Wallet Stolen
Description of the event: On June 18,2019, the US Commodity Futures Trading Commission (CFTC) announced it had initiated a civil enforcement action against a now-defunct cryptocurrency trading and investment company for misappropriating $147 million worth of Bitcoin. The Complaint charges the defendants—Control-Finance Limited and its principal, Benjamin Reynolds—with exploiting public enthusiasm for crypto assets by fraudulently obtaining and misappropriating at least 22,858.822 Bitcoin from more than 1,000 customers through a classic (HYIP) Ponzi scheme called the Control-Finance Affiliate Program.
Amount of loss: 22,858.822 BTC Attack method: Scam
Description of the event: According to internet rumors, 66,000 bitcoins were suspected to have been stolen from the BTC-e exchange. The user inquired on the blockchain that the block with a block height of 477472 was transferred out of 66163.40004136 bitcoins. It is suspected that the BTC-e user was stolen by hackers of a huge amount of bitcoins.
Amount of loss: 990,000,000 USD Attack method: Unknown
Description of the event: On July 29, 2017, the Ethereum multi-signature wallet company Parity issued a security alert, notifying users of serious vulnerabilities in its wallet v1.5 or later. That day, a black hat hacker used the vulnerability to exhaust the Parity wallets of three Ethereum projects, stealing a total of 153,037 ETH from Swarm City, Edgeless, and Aeternity.
Amount of loss: 153,037 ETH Attack method: Unauthorized operation
Description of the event: Hacker steals $7.4 million in ethereum during CoinDash ICO launch. At the time of the ICO, in which CoinDash posted a string of characters which represented its wallet address for investors to send funds to, it appears that the hacker compromised the website and changed this text to a wallet they control. It was a matter of minutes before the platform realized the security breach had taken place and warned investors, but it was too late -- and now the stolen funds intended for CoinDash are simply sitting in a wallet awaiting collection.
Amount of loss: 7,400,000 USD Attack method: Malicious Code Injection Attack
Description of the event: Bithumb is one of the five largest bitcoin exchanges in the world. Hackers succeeded in grabbing the personal information of 31,800 Bithumb website users, including their names, mobile phone numbers and email addresses. The exchange claims that this number represents approximately three percent of customers. And the exchange further claims that the breach was made to a personal computer belonging to an employee, and not the exchange’s internal network, servers nor digital currency wallets. Attackers appear to have stolen enough credentials to begin a process of “voice phishing,” where the scammers call up victims one at a time and pose as representatives of Bithumb.
Amount of loss: 1,000,000 USD Attack method: Phishing attack