Crypto Hacks
Top 10 crypto hacks of 2017
In 2017, attackers took $289M in 12 crypto hacks and thefts. The biggest was Parity Multisig on Nov 9, 2017, at $150M. The 7 largest account for 100% of the year's losses.
Last updated · Data last changed · Checked daily
The 7 biggest crypto hacks of 2017, ranked
1
Parity Multisig
Nov 9, 2017DeFi ProtocolEthereum$150MA user reinitialized Parity’s shared wallet library and then destroyed it, permanently disabling more than 500 multisig wallets containing about 500,000 ETH.
2
Nicehash
Dec 8, 2017CEXBitcoin$64MAttackers obtained NiceHash employee credentials through phishing and accessed the company’s payment wallet, stealing more than 4,700 BTC. NiceHash later repaid affected users.
Our coverage: NiceHash CEO Confirms Theft Of More Than 4,700 BitcoinsSource
3
Tether
Nov 19, 2017TokenBitcoin$31MAn external attacker took USDT from Tether’s Treasury wallet and sent it to an unauthorized address. Tether blocked the tokens from circulating or being redeemed and worked with the Omni Foundation on changes to reclaim them.
Our coverage: Under-pressure Tether Alleges $30 Million Loss To HackSource
4
Parity
Jul 1, 2017WalletEthereum$30MA flaw in Parity’s multisignature-wallet library let an attacker take ownership of wallets and drain them. A white-hat group used the same flaw to rescue funds from other vulnerable wallets.
5
Coindash
Jul 18, 2017ICOEthereum$7.7MAn attacker compromised CoinDash’s ICO website and replaced its deposit address with one they controlled. Investors sent ETH to that address before the sale was stopped; the attacker retained some of the funds.
6
Yapizon
Apr 27, 2017CEXBitcoin$4.8MAttackers breached Yapizon’s system and stole bitcoin from four hot wallets. The exchange replaced users’ lost balances with Fei tokens, which represented IOUs.
7
EtherDelta
Dec 20, 2017CEXEthereum$1.4MAttackers hijacked EtherDelta’s website address and redirected users to a phishing site that captured their login details, leading to theft from users.
