Automated Libra, a “freejacking” group based in South Africa, use interesting techniques to steal computing resources from big US platforms and infrastructure providers.
Automated Libra is behind a campaign dubbed PurpleUrchin that mass-exploited free trials for cloud computing resources to mine cryptocurrency.
However, according to Unit 42’s report, Automated Libra’s campaign didn’t stop at abusing the limited free trials of platforms like Microsoft-owned Github and Salesforce-owned Heroku.This allowed them to rack up cloud service bills for which they ultimately didn’t pay. While the individual bills were relatively small, Automated Libra found ways to automatically create thousands of accounts through which they could steal resources.
The identify command was then executed over each image to extract the “skewness” feature of the red colour channel.Unit 42 said it did not evaluate how effective this automatic CAPTCHA-solving technique was.The researchers said they identified over 40 individual crypto wallets and seven different cryptocurrencies or tokens used within the PurpleUrchin operation.
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