Mining operation led by Minero being manageed centrally
In the digital world of cryptocurrencies, the Qubic mining pool has been amassing hashrate for an unspecified purpose. This has recently led to a successful 51% attack on Monero's blockchain, a privacy-focused cryptocurrency launched in 2014 and already banned from most major centralized exchanges.
The attack, carried out by an individual known by the nickname Evilcos, has given Qubic significant control over the Monero network's hashrate. This control, if left unchecked, could allow Qubic to modify transaction ordering, perform double spending, censor or block transactions, and reorganize the blockchain. Such actions would undermine network integrity and security, with consequences that are already being felt.
The consequences of the attack are far-reaching. The reorganization of the blockchain, evident by the six-block deep reorganizations caused by Qubic, has raised concerns about the decentralization of the network. Potential reversal or blocking of transactions is a threat to user trust, leading to a significant loss of market confidence. This loss has resulted in a price slide, with the Monero price dropping to a 3-month low and the market cap dropping by 20%.
Platforms like Kraken have reacted to the situation by suspending Monero deposits and increasing confirmation requirements to safeguard assets. The attack has also highlighted the need for hash rate decentralization, with experts suggesting incentives for smaller mining pools to dilute mining power concentration.
In response to the attack, several countermeasures are being considered or implemented. These include the adoption of a proposed "detective mining" strategy, which forces attackers to reveal hash rate advantages, raising the difficulty and cost of profitable selfish mining or 51% attacks. Consensus mechanism overhauls and upgrades, like Monero’s ChainLocks, aim to strengthen the network against future majority-hashrate attacks.
Continuous network monitoring by exchanges and the community, collaborations between platforms for rapid anomaly identification and response, and promoting hash rate decentralization are other strategies being pursued. Exchanges are also increasing security measures by raising confirmation thresholds or temporarily suspending Monero deposits during attacks to prevent loss.
The cost of the 51% attack on the Monero network is high, with estimates suggesting it could cost approximately $75 million per day, according to Charles Guillaume, Technical Director of Ledger. The economic benefits of the attack, however, remain uncertain.
Experts are monitoring the situation on the Monero network closely, with the successful 51% attack raising concerns about the potential for rewrite of transaction history and double spending on the Monero blockchain. The attack serves as a stark reminder of the importance of network security and the need for continued vigilance in the ever-evolving world of cryptocurrencies.
(August 12, 2025)
- The successful 51% attack on Monero's blockchain by Qubic, driven by their amassed hashrate, has demonstrated the potential vulnerabilities of technology in the cryptocurrency world, particularly in the realm of privacy-focused digital assets.
- The control Qubic now holds over the Monero network's hashrate, due to the attack, underscores the importance of ensuring technology remains decentralized and secure to maintain network integrity and user trust, thereby avoiding significant losses in market confidence and subsequent drops in asset prices.
