Hack News

Crypto news, in-depth analysis and latest market developments tagged Hack. The COINOTAG editorial desk keeps the archive continuously updated.

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August 7, 2026 at 03:24 AM UTC

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Latest Articles — Page 2

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Bitcoin Targeted in North Korean Hack Campaign Across 1,640 Firms
Crypto News Bitcoin (BTC) wallets and private keys were the central objective in a North Korean hacking campaign that reached 1,640 companies across 57 countries, according to internal evidence presented by security researcher Vangelis Stikas at the Black Hat conference. The keys targete
Aug 7, 2026
Ethereum Wallet Threat Exposed in North Korean Hack Data With 1,640 Victims
Researcher's 22-month infiltration of North Korean servers exposed 1,640 organizations and put Ethereum wallet custody at risk.
Aug 6, 2026
Bitcoin (BTC) Users in Korea Avoid 1,596 BTC Coldcard Exploit
South Korea’s Bitcoin users avoided the 1,596 BTC Coldcard exploit by using manual entropy, while on-chain data confirms faulty RNG.
Aug 6, 2026
Bitcoin Mempool Spikes to 89,031 After Coldcard Hack
Bitcoin News Bitcoin (BTC) network activity surged after the July 30 Coldcard wallet theft began, prompting users to reorganize holdings, with unconfirmed transactions in the memory pool reaching 89,031 on Tuesday, the highest count
Aug 5, 2026
Bitcoin (BTC) Coldcard Bug Drains More Than 1,300 BTC
A Coldcard entropy flaw drained over 1,300 BTC, Bitcoin trades near $63,500, and Bitdeer signs a $4.7 billion Norway AI data-center deal.
Aug 5, 2026
Bitcoin Bridge Boltz Suspends Swaps With $262K TVL After AI Attacks
Bitcoin News Bitcoin (BTC) swap provider Boltz has suspended its non-custodial bridge service indefinitely, saying automated attacks powered by artificial intelligence are now finding vulnerabilities faster than its engineers can close th
Aug 5, 2026
Bitcoin (BTC) Coldcard Exploit Losses Top $100 Million
Bitcoin News Bitcoin (BTC) holders using Coldcard hardware wallets have lost more than $100 million after a firmware flaw made private-key generation predictable. The episode is a stress test for <a href='https://en.coinotag.com/tag/
Aug 4, 2026
Bitcoin (BTC) Active Addresses Hit 980,000 After Coldcard Hack
Bitcoin News Bitcoin (BTC) recorded its most active on-chain day since Dec. 10, 2024, after daily active addresses climbed from about 645,000 on July 30 to roughly 980,000 on July 31. The surge was not driven by fresh demand. It followed a security incident involving Coldcard hardware wa
Aug 4, 2026
Bitcoin (BTC) Whales Accumulate 19,610 BTC After Coldcard Exploit
Bitcoin News Bitcoin (BTC) whales used a security-driven selloff as an accumulation window, adding 19,610 BTC since July 29 while smaller holders retreated, according to on-chain data. Wallets holding between 10 and 10,000 BTC lifted
Aug 4, 2026
Bitcoin’s Boltz Halts Atomic Swaps With $180,860 Locked
Bitcoin News Boltz, a non-custodial swap protocol built around Bitcoin (BTC), halted all atomic swap operations on Monday after concluding that AI-assisted attackers are disco
Aug 4, 2026
Worldcoin (WLD) in Focus After 17,000-Action AI Agent Hack
Worldcoin News Worldcoin (WLD) is being watched through an AI-governance lens after Hugging Face disclosed that a rogue OpenAI agent breached its platform, with the episode spanning about four and a half days and generating more than 17,000 separate actions. The disclosure sharpened comm
Aug 3, 2026
Bitcoin Slips Near $62K on Coldcard Wallet Hack Concerns
Bitcoin News Bitcoin (BTC) declined 1.3% to $62,591 after security researchers raised concerns about a possible Coldcard wallet exploit. The warning placed custody safety at the center of short-term market discussion, because hardware dev
Aug 3, 2026
Bitcoin (BTC) Coldcard Exploit Losses Reach 1,367 BTC
Bitcoin News Bitcoin (BTC) advocate Samson Mow issued a five-step emergency guide for users hit by the Coldcard seed-generation flaw, placing the immediate focus on evidence preservation rather than panic selling. The JAN3 chief executive said affected holders should record every relevan
Aug 3, 2026
Bitcoin Coldcard Losses Reach 1,367 BTC After Third Wave
Bitcoin News On-chain analysis of the Coldcard firmware flaw shows Bitcoin losses have expanded to 1,367.05 BTC, about $88.6 million, across 4,585 addresses after three suspected attack waves. The first sweep began early on July 30 a
Aug 2, 2026
Bitcoin (BTC) Coldcard Sweep Losses Reach 1,367 BTC
Bitcoin News Bitcoin (BTC) wallets generated by a vulnerable Coldcard firmware build have lost about 1,367 BTC across three suspected sweeping campaigns, according to on-chain data reviewed by COINOTAG, with the coins valued near $88.6 mi
Aug 1, 2026
Bitcoin (BTC) Sentiment Hits Record Low After $70M Coldcard Exploit
Bitcoin News Bitcoin (BTC) social sentiment has dropped to its most negative reading on record after a Coldcard firmware exploit drained about $70 million from self-custody users, turning a security incident into a confidence test fo
Aug 1, 2026
XRP Fake Staking Scam Drains About 3.4M XRP
XRP News A fraudulent XRP staking platform that impersonated Flare Network and FXRP projects stole about 3.4 million XRP from 71 victims before South Korean police arrested three suspects, according to law-enforcement findings reviewed by COI
Aug 1, 2026
Ethereum’s Kelp DAO Leads $940M H1 Crypto Exploit Losses
Crypto News Ethereum (ETH) faced the largest single security failure in the first half of 2026 when Kelp DAO’s rsETH, a liquid restaking token tied to Ethereum staking yields, lost $292 million after attackers forged a LayerZero cross-chain message. The incident was the biggest of 135 exp
Aug 1, 2026
Bitcoin (BTC) Coldcard Flaw Drains 1,082 BTC
Bitcoin News A security failure in a long-used Bitcoin hardware wallet drained 1,082.65 BTC from 1,196 addresses on July 30, according to on-chain analysis reviewed by COINOTAG, making it one of the largest self-custody breaches tied to a single device family. The transfers occurred in a
Aug 1, 2026
Bitcoin (BTC) Coldcard Hack Drains $70M From 1,196 Wallets
Bitcoin News A firmware flaw in Coldcard devices led to the loss of more than $70 million in Bitcoin (BTC) after attackers drained 1,082.65 BTC from 1,196 addresses, according to on-chain analysis of the transfers. The transfers were
Jul 31, 2026