Recently, artificial intelligence has received serious development. In some areas, neural networks can already compete with humans. For example, Midjourney can already produce high quality images and ChatGPT can write or analyse fragments of code. Callisto Team is pioneering the adoption of neural networks in security area to automate the…

ERC-20 token standard contains a major logical flaw — lack of communication model (lack of transaction handling model). This problem is well-known. I wrote tens of articles on Ethereum reddit, gitter and github during the past 6 years. Starting from this post. Also, here is Vitalik Buterin’s comment on this. …

Exploit overview On 6 October 2022 an attacker tricked Binance Bridge to issue 2M BNB (worth ~$550M at that moment). The attacker then used the “printed” BNB as a collateral to borrow multiple other assets and transferred them to other EVM-compatible chains. Approximately $130M worth of assets were moved out. The rest…

Callisto Network is launching an “early adopters SBT campaign”. You can now request your SBT by commenting on the following twitter thread: https://twitter.com/CallistoSupport/status/1598317345738481667 What are SBTs? SoulBound Tokens are non-transferable NFTs that you can own, but cannot give to anyone else. The point is that we have a type of “valuables” in…

Exploit overview On October 11, 2022 the DeFi protocol TempleDAO was exploited. About $2,3M worth of funds were withdrawn from the platform contract at that time. The amount is 4% of the total amount of funds involved in the TempleDAO. The attacker then moved the funds to TornadoCash. Here is the invocation…

SBTs in a nutshell The original idea of SoulBound Tokens was described by Vitalik in this artile. There are special types of valuables in the world that cannot be transferred. For example licenses, certificates, documents. In most cases, these are “rights” given by one party to another without permission to transfer these “rights” to…

What is CallistoNFT? CallistoNFT is an alternative non-fungible token standard that can be used for deploying NFTs instead of ERC721. CallistoNFT description by Dexaran on medium Source code Proposal documentation on Ethereum CallistoNFT introduces 4 new concepts on top of NFT functionality: Built-in trades — these NFTs can be traded in a…

In this article I’d like to provide some data regarding the recent NFT thefts. The original data is provided by Decrypt. Analysis is provided by Callisto Security Department. 300+ NFTs Stolen, $400K in Ethereum Taken In Premint Hack - Decrypt On Sunday, hackers infiltrated popular NFT registration platform Premint and made away with 320 stolen NFTs and more…decrypt.co $1.7 Million NFT Phishing Attack 'Did Not Originate' on OpenSea, Says CEO - Decrypt Last night, reports surfaced that NFT collectors had been losing NFTs and Ethereum from wallets. OpenSea has now…decrypt.co

In the Ethereum universe, there is a single, canonical computer (called the Ethereum Virtual Machine, or EVM) whose state everyone on the Ethereum network agrees on. Everyone who participates in the Ethereum network (every Ethereum node) keeps a copy of the state of this computer. Additionally, any participant can broadcast…