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Yahoo Malware Turned Pcs Into Bitcoin Miners

Bitcoin is mined in blocks, and since it takes a lot of computing power to mine a block, the miners join forces and form mining pools or "bitcoin mining networks" -- in which each one participates with his computing power and gets in return his share of the revenue. In our case, the malware author would be the sole beneficiary of the mining efforts. Bitcoin mining on computers is not usually worth the effort, Engel added, because the electrical cost of operating the computer is higher than the revenue garnered from see here the mining itself. But the malware author stole the computing resources of the affected machines and did it in such large numbers as to turn a profit from external link the operation. The malware attack reportedly lasted from December 31 through January 3, when Yahoo took down the malicious ads. On Saturday, Yahoo acknowledged the issue through the following statement: At Yahoo, we take the safety and privacy of our users seriously. On Friday, January 3 on our European sites, we served some advertisements that did not meet our editorial guidelines, specifically they spread malware. We promptly removed these advertisements. view website
More: http://news.cnet.com/8301-1009_3-57616958-83/yahoo-malware-turned-pcs-into-bitcoin-miners/

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