Tagattack

Microsoft Labels Malicious Crypto Mining an 'Increasing Threat' as Ransomware Attacks Drop

Microsoft has released a blog post discussing the emerging threat of malicious cryptocurrency miners. The post from the Windows Defender Research blog noted that the number of enterprise computers encountering unauthorized coin miners doubled from December to January 2018. Microsoft suggest that the reason for this rise is that cyber criminals are moving to this form of attack due to the...

Op-ed: Blockstream Calls a Bitcoin Mining Optimization an "Attack"

Bitcoin DDoS

Gregory Maxwell, Blockstream’s CTO, has made an astonishing statement in the mailing list regarding an algorithmic optimization called AsicsBoost which was revealed last year. Maxwell states: “Due to a design oversight the Bitcoin proof of work function has a potential attack which can allow an attacking miner to save up-to 30% of their energy costs (though closer to 20% is more likely due to...

What Caused the Bitcoin Unlimited Node Crash?

Bitcoin Unlimited nodes went down like a rock yesterday as a vulnerability was exploited. They now appear to have recovered, but the speed with which nodes fell is unprecedented. The cause appears to be the use of “asserts” in production. This will get a bit technical, but we asked a pseudo-anonymous Bitcoin Unlimited developer who would rather not be named to provide an explanation for a non...

Bitcoin Core Developers Attack Bitcoin Unlimited

Bitcoin DDoS

Editor's Note: The article has been amended to remove references to Bitcoin Core contributor Eric Lombrozo, who has confirmed to CCN that he is not related to ‘ciphera‘, as reported erroneously at the time of publishing. The empire strikes back. As the people rise and gain the majority of miners who have decided, Bitcoin Core developers have gone on the attack. A bug on the overlay xThin client...

Ethereum Classic’s Price Crashes as Network Comes Under Attack

Ethereum Classic lost more than 10% of its value today with price standing just above $1 as the network comes under sustained dos attack. The attacks are similar to those experienced by Ethereum over last month. A programmer is exploiting gas mispricing for certain op codes to drain nodes of memory and other resources thus slowing them down. Who or why is a matter of speculation. For ETC...

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