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ILLICIT CRYPTOCURRENCY MINING THREAT

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ILLICIT CRYPTOCURRENCY MINING THREAT ( illicit-cryptocurrency-mining-threat )

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THE ILLICIT CRYPTOCURRENCY MINING THREAT mining activities. YouTube became embroiled in the discussion when a compromised advertisement running on YouTube videos began mining operations in users’ browsers22. Facebook messenger23 and Starbucks24 Wi-Fi users were also unwittingly dragged into mining operations when those services became compromised by malicious actors using CoinHive. One large-scale browser-based illicit cryptocurrency mining campaign took place in May 2018, when attackers compromised more than 400 websites via a vulnerability affecting the Drupal CMS25. Once the criminals gained access to the site, they inserted a reference to an externally hosted JavaScript file, which contained the mining code via CoinHive (Figure 9).26 Affected websites included the San Diego Zoo, and the government of Chihuahua, Mexico. This illicit instance of the CoinHive script was designed to run with minimal interference and did not inform the computer’s user that it was running in the background. This attack was estimated to have generated $11,000 for the attacker27. Some security companies reacted by blocking the domain of CoinHive, the company who created the script. Unfortunately, that action is only effective as a deterrent so long as the criminals continue using the same, blacklisted domain to host their code. While conducting research for this report, a plethora of websites offering their own flavor of JavaScript cryptocurrency miner code for download were found (Figure 10). If malicious actors put the JavaScript on someone else’s website, they can still link to it and earn cryptocurrency for doing so. Figure 9. Injected JavaScript code used in widespread Drupal infection campaign.26 Figure 10. Screen shot of some of alternative JavaScript miner downloads 22 https://finance.yahoo.com/news/youtube-gets-hacked-cryptocurrency-miners-174508213.html 23 https://blog.trendmicro.com/trendlabs-security-intelligence/facexworm-targets-cryptocurrency-trading-platforms-abuses-facebook-messenger-for-propagation/ 24 https://motherboard.vice.com/en_us/article/gyd5xq/starbucks-wi-fi-hijacked-peoples-laptops-to-mine-cryptocurrency-coinhive 25 https://badpackets.net/large-cryptojacking-campaign-targeting-vulnerable-drupal-websites/ 26 https://twitter.com/bad_packets/status/992555535735050240 27 https://www.scmagazineuk.com/cryptomining-campaign-targeting-web-servers-vulnerable-drupalgeddon-20-nets-8000/article/1487700 13

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