Exploatările DeFi totalizează 680 de milioane de dolari până acum în 2021

The total amount of funds stolen in DeFi attacks has reached $680 million so far this year, according to Tabloul de bord al blocului.

Data collected by The Block Research shows that $1.4 billion was initially taken from DeFi protocols through exploits and bugs but $760 million has been returned. 

Over the year, the space witnessed 70 of the biggest DeFi exploits across four blockchain platforms. The majority of the exploits happened on Ethereum — 34 to be precise — with Binance Smart Chain a close runner-up with 25 attacks. We also saw three on Polygon and two on Avalanche.

Out of the attacks, 34 of them employed flash loans. These are loans that are taken out, used for some function and repaid all in the same transaction block. This means the lender knows their money will be returned (or it was never borrowed in the first place).

As a result, flash loans can be very large at a low cost, enabling hackers to borrow huge amounts of funds in order to maximize the damage of such attacks. (For a detailed analysis of the pros and cons of flash loans, Vezi aici.)

For example, DeFi protocol xToken suffered an exploit in May. The perpetrator used a flash loan to borrow 61,800 ETH ($270 million) to upset the system and take off with $24.5 million. The sheer size of the flash loan made the attack more profitable.

Three of the five biggest hacks were for Poly Network, which a pierdut 611 milioane de dolari in total before it was then all returned. Other big losses included Compound, which suffered a bug in September that led to the eliberare neintenționată of $114 million in COMP tokens — of which about half was returned.

Late last month, Cream Finance was exploatat pentru 130 milioane de dolari using a large flash loan. 

For context, this data doesn’t include covoare trage și other crypto swindles — it’s only focused on exploits of DeFi protocols.

© 2021 The Block Crypto, Inc. Toate drepturile rezervate. Acest articol este furnizat doar în scop informativ. Nu este oferit sau intenționat să fie utilizat ca avize legale, fiscale, de investiții, financiare sau de altă natură.

Source: https://www.theblockcrypto.com/post/123030/defi-exploits-total-680-million-so-far-in-2021?utm_source=rss&utm_medium=rss