{"id":20204,"date":"2018-11-26T20:31:00","date_gmt":"2018-11-26T20:31:00","guid":{"rendered":"http:\/\/157b9f8e-dd1a-4d3b-ae1a-c84c6ef29cb9"},"modified":"2018-11-26T20:31:00","modified_gmt":"2018-11-26T20:31:00","slug":"hacker-backdoors-popular-javascript-library-to-steal-bitcoin-funds","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/hacker-backdoors-popular-javascript-library-to-steal-bitcoin-funds\/","title":{"rendered":"Hacker backdoors popular JavaScript library to steal Bitcoin funds"},"content":{"rendered":"<p><span class=\"img aspect-set\"><img decoding=\"async\" src=\"https:\/\/zdnet4.cbsistatic.com\/hub\/i\/2018\/11\/26\/846506c2-16b6-4675-99f0-a6b56691eec4\/15c79b257c64510a5a7847db21dbd5d0\/copay.png\" class=\"\" alt=\"copay.png\"\/><\/span><span class=\"credit\">Image: BitPay<\/span><\/p>\n<p>A hacker has gained (legitimate) access to a popular JavaScript library and has injected malicious code that steals Bitcoin and Bitcoin Cash funds stored inside BitPay&#8217;s Copay wallet apps.<\/p>\n<p>The presence of this malicious code was <a href=\"https:\/\/github.com\/dominictarr\/event-stream\/issues\/116\" target=\"_blank\" rel=\"noopener noreferrer\">identified last week<\/a>, but only today have researchers been able to understand what the heavily obfuscated malicious code actually does.<\/p>\n<div class=\"relatedContent alignRight\">\n<h3 class=\"heading\"><span class=\"int\">More security news<\/span><\/h3>\n<\/div>\n<p>The library loading the malicious code is named Event-Stream, a JavaScript npm package for working with <a href=\"https:\/\/nodejs.org\/api\/stream.html\" target=\"_blank\" rel=\"noopener noreferrer\">Node.js streaming data<\/a>.<\/p>\n<p>This is an extremely popular JavaScript library, with over two million weekly downloads on the npm.org repository, but about three months ago, its original author, due to a lack of time and interest, handed its development over to another programmer named <a href=\"https:\/\/github.com\/right9ctrl\" target=\"_blank\" rel=\"noopener noreferrer\">Right9ctrl<\/a>.<\/p>\n<p>But according to an eagle-eyed user who spotted issues with Event-Stream last week, Right9ctrl had immediately poisoned the library with malicious code.<\/p>\n<p>Right9ctrl released Event-Stream 3.3.6 which contained a new dependency &#8211;for the Flatmap-Stream library version 0.1.1. The Flatmap-Stream library v0.1.1 is where the malicious code resides.<\/p>\n<p>According to users on Twitter, GitHub, and Hacker News, this malicious code lays dormant until it&#8217;s used inside the source code of <a href=\"https:\/\/copay.io\/\" target=\"_blank\" rel=\"noopener noreferrer\">Copay<\/a>, a desktop and mobile wallet app developed by Bitcoin payment platform BitPay.<\/p>\n<section class=\"sharethrough-top\" data-component=\"medusaContentRecommendation\" data-medusa-content-recommendation-options=\"{&quot;promo&quot;:&quot;promo_ZD_recommendation_sharethrough_top_in_article_desktop&quot;,&quot;spot&quot;:&quot;dfp-in-article&quot;}\">\n<\/section>\n<p>Once the malicious code has been compiled and shipped inside poisoned versions of the Copay wallet app, it will steal users&#8217; wallet information, <a href=\"https:\/\/github.com\/dominictarr\/event-stream\/issues\/116#issuecomment-441759047\" target=\"_blank\" rel=\"noopener noreferrer\">including private keys<\/a>, and send it to the <em>copayapi.host<\/em> URL on port <em>8080<\/em>.<\/p>\n<p>It is believed that the hacker is using this information to empty victims&#8217; wallets. For the time being, it is safe to believe that all versions of the Copay wallet released <a href=\"https:\/\/github.com\/bitpay\/copay\/tags\" target=\"_blank\" rel=\"noopener noreferrer\">in September, October, and this month<\/a>, are considered to have been infected.<\/p>\n<p>Earlier today, the BitPay team released <a href=\"https:\/\/github.com\/bitpay\/copay\/pull\/9348\" target=\"_blank\" rel=\"noopener noreferrer\">Copay v5.2.2<\/a> to remove the Event-Stream and Flatmap-Stream dependencies.<\/p>\n<p>Maintainers of the npm.org JavaScript package repository have also intervened and <a href=\"https:\/\/github.com\/hugeglass\/flatmap-stream\/issues\/2\" target=\"_blank\" rel=\"noopener noreferrer\">taken down<\/a> the Flatmap-Stream library from their site, making it inaccessible to all the projects where this was being loaded via the npm package installer utility.<\/p>\n<p>The malicious Event-Stream v3.3.6 has also been taken down from npm.org, but the Event-Stream library is still available. This is because Right9ctrl, in an attempt to hide his malicious code, released subsequent versions of Event-Stream that didn&#8217;t contain any malicious code.<\/p>\n<p>Project maintainers who use these two libraries are advised to update their dependency trees to the latest version available &#8211;Event-Stream version 4.0.1. <a href=\"https:\/\/github.com\/dominictarr\/event-stream\/files\/2616706\/flatmap-deps-list.txt\" target=\"_blank\" rel=\"noopener noreferrer\">This link<\/a> contains a list of all the 3,900+ JavaScript npm packages where Event-Stream is loaded as a direct or indirect dependency.<\/p>\n<p>This manual update\/removal step is necessary as some projects are configured to cache all dependencies locally, and might not trigger the usual console error when attempting to download a non-existent npm package from npm.org when building a new project version.<\/p>\n<p>This is not the first JavaScript\/npm-related security issue that has taken place in the past years. <a href=\"https:\/\/eslint.org\/blog\/2018\/07\/postmortem-for-malicious-package-publishes\" target=\"_blank\" rel=\"noopener noreferrer\">In July this year<\/a>, a hacker compromised the ESLint library with malicious code that was designed to steal the npm credentials of other developers.<\/p>\n<p><a href=\"https:\/\/blog.npmjs.org\/post\/173526807575\/reported-malicious-module-getcookies\" target=\"_blank\" rel=\"noopener noreferrer\">In May 2018<\/a>, a hacker tried to hide a backdoor in another popular npm package named getcookies.<\/p>\n<p><a href=\"https:\/\/www.bleepingcomputer.com\/news\/security\/javascript-packages-caught-stealing-environment-variables\/\" target=\"_blank\" rel=\"noopener noreferrer\">In August 2017<\/a>, the npm team removed 38 JavaScript npm packages that were caught stealing environment variables from other projects, in an attempt to collect project-sensitive information, such as passwords or API keys.<\/p>\n<h3>RELATED COVERAGE:<\/h3>\n<p>READ MORE <a href=\"https:\/\/www.zdnet.com\/article\/hacker-backdoors-popular-javascript-library-to-steal-bitcoin-funds\/#ftag=RSSbaffb68\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Users of BitPay&#8217;s Copay desktop and mobile wallet apps are affected. An update has been released earlier today that doesn&#8217;t contain the malicious code.<br \/>\nREAD MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":20205,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[62],"tags":[],"class_list":["post-20204","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-zdnet-security"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Hacker backdoors popular JavaScript library to steal Bitcoin funds 2026 | ThreatsHub Cybersecurity News<\/title>\n<meta name=\"description\" content=\"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security &amp; Cyber Threats Analysis Hub. 100% Free OSINT Threat Intelligent and Cybersecurity News.\" \/>\n<meta name=\"robots\" content=\"index, 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