Malicious Package

Overview Version 2.0.2 contained malicious code. The package targeted the Ethereum cryptocurrency and performed transactions to wallets not controlled by the user. Recommendation Remove the package from your environment. Ensure no Ethereum funds were compromised. References GitHub Advisory...

Cracking Forgotten Passwords

Expandpass is a string expansion program. It's "useful for cracking passwords you kinda-remember." You tell the program what you remember about the password and it tries related passwords. I learned about it in this article about Phil Dougherty, who helps people recover lost cryptocurrency...

Theo - Ethereum Recon And Exploitation Tool

Theo aims to be an exploitation framework and a blockchain recon and interaction tool. Features: Automatic smart contract scanning which generates a list of possible exploits. Sending transactions to exploit a smart contract. Transaction pool monitor. Web3 console Frontrunning and backrunning...

MyEtherWallet: Local Storage Custom Node Credentials Leak

Summary Credentials for a custom node are stored in plain text inside Local Storage on the user's machine. If this node is configured in a certain way this could lead to the theft of any funds in accounts attached to this node, by a local attacker. And if not configured this way, an attacker coul...

Deserialization of Untrusted Data in EthereumJ

An issue was discovered in EthereumJ 1.8.2. There is Unsafe Deserialization in ois.readObject in mine/Ethash.java and decoder.readObject in crypto/ECKey.java. When a node syncs and mines a new block, arbitrary OS commands can be run on the server...

What is BAT and why you should install Brave Browser?

BAT is an Ethereum token that powers Brave Software's blockchain-based digital advertising platform. Internet users who browse the web using Brave's free web browser available at can choose to replace the ads they see with ads on Brave's ad network. Users then receive BAT from advertisers as...

Echidna - Ethereum Fuzz Testing Framework

Echidna is a weird creature that eats bugs and is highly electrosensitive with apologies to Jacob Stanley More seriously, Echidna is a Haskell library designed for fuzzing/property-based testing of EVM code. It supports relatively sophisticated grammar-based fuzzing campaigns to falsify a variety...

Hardcoded credentials

The doAirdrop function of a smart contract implementation for Primeo PEO, an Ethereum token, does not check the numerical relationship between the amount of the air drop and the token's total supply, which lets the owner of the contract issue an arbitrary amount of currency. Increasing the total...

CVE-2018-18425

The doAirdrop function of a smart contract implementation for Primeo PEO, an Ethereum token, does not check the numerical relationship between the amount of the air drop and the token's total supply, which lets the owner of the contract issue an arbitrary amount of currency. Increasing the total...

CVE-2018-18425

CVE-2018-18425 concerns Primeo (PEO), an Ethereum token. The doAirdrop function does not enforce a correct relation between the airdropped amount and the token’s total supply, allowing the contract owner to issue arbitrary currency. This bypasses the hard cap written in the contract and can deval...

Stealing Ethereum by Guessing Weak Private Keys

Someone is stealing millions of dollars worth of Ethereum by guessing users' private keys. Normally this should be impossible, but lots of keys seem to be very weak. Researchers are unsure how those weak keys are being generated and used. Their paper is here...

A 'Blockchain Bandit' Is Guessing Private Keys and Scoring Millions

The larger lesson of an ongoing Ethereum crime spree: Be careful about who's generating your cryptocurrency keys...

Integer overflow

An Integer overflow vulnerability exists in the batchTransfer function of a smart contract implementation for CryptoBotsBattle CBTB, an Ethereum token. This vulnerability could be used by an attacker to create an arbitrary amount of tokens for any user...

CVE-2018-17882

An Integer overflow vulnerability exists in the batchTransfer function of a smart contract implementation for CryptoBotsBattle CBTB, an Ethereum token. This vulnerability could be used by an attacker to create an arbitrary amount of tokens for any user...

CVE-2018-17882

Summary: CVE-2018-17882 concerns CryptoBotsBattle (CBTB), an Ethereum token. The flaw is an integer overflow in the smart contract’s batchTransfer function, enabling an attacker to create an arbitrary number of tokens for a user. Concrete details across connected sources confirm the affected comp...

CVE-2018-17882

An Integer overflow vulnerability exists in the batchTransfer function of a smart contract implementation for CryptoBotsBattle CBTB, an Ethereum token. This vulnerability could be used by an attacker to create an arbitrary amount of tokens for any user...

First 'Clipper' Malware Discovered on Google Play

A malicious app designed to steal cryptocurrency from victims by replacing a wallet address in the phone’s clipboard has been discovered harboring the first “clipper” malware discovered on Google Play, the official Android app store. Usually cryptocurrency-stealers are found on unsanctioned Andro...

First Android Clipboard Hijacking Crypto Malware Found On Google Play Store

A security researcher has discovered yet another cryptocurrency-stealing malware on the official Google Play Store that was designed to secretly steal bitcoin and cryptocurrency from unwitting users. The malware, described as a "Clipper," masqueraded as a legitimate cryptocurrency app and worked ...

Cryptocurrency Firm Loses $145 Million After CEO Dies With Only Password

QuadrigaCX, the largest bitcoin exchange in Canada, has claimed to have lost CAD 190 million nearly USD 145 million worth of cryptocurrency after the exchange lost access to its cold offline storage wallets. Reason? Unfortunately, the only person with access to the company's offline wallet, found...

Ethereum Classic (ETC) Hit by Double-Spend Attack Worth $1.1 Million

Popular cryptocurrency exchange Coinbase has suspended all transactions of Ethereum Classic ETC—the original unforked version of the Ethereum network—on their trading platforms, other products and services after detecting a potential attack on the cryptocurrency network that let someone spend the...