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Cybersecurity researchers found ‘Cloud9’, a brand new Chrome browser botnet that makes use of malicious extensions to steal consumer credentials, log keystrokes, inject malicious JS code and advertisements, and even conduct DDoS assaults.
The Cloud9 botnet acts as a Distant Entry Trojan (RAT) for Chromium net browsers reminiscent of Google Chrome and Microsoft Edge, permitting the menace actor to execute instructions remotely.
The malicious extension is just not discovered within the Chrome on-line retailer, however spreads by way of unofficial channels, reminiscent of web sites that publicize pretend Adobe Flash Participant updates. Zimperium researchers confirmed that they’ve seen Cloud9 infections on techniques around the globe, indicating that this technique seems to be efficient.
Extension put in in Google Chrome
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Cloud9 assaults on a number of fronts
The extension is made up of three JavaScript information which can be used to gather system info, mine bitcoins utilizing host sources, launch DDoS assaults, and inject scripts that execute browser vulnerabilities.
Zimperium found exploits for the vulnerabilities CVE-2019-11708 and CVE-2019-9810 in Firefox, CVE-2014-6332 and CVE-2016-0189 in Web Explorer, and CVE-2016-7200 in Edge. These flaws are exploited to robotically set up and run Home windows malware on the host, permitting attackers to hold out much more severe system breaches.
Cloud 9 incorporates a “clipper” module that always screens the system clipboard for stolen passwords or bank cards.
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The malware additionally features a keylogger to listen in on keystrokes and seize passwords and different delicate info.
The extension may even inject commercials by silently loading net pages to achieve advert impressions and generate cash for his or her house owners.
And eventually, malware can use the host’s firepower to launch Layer 7 DDoS assaults on the goal area through HTTP POST requests. “Layer 7 assaults are sometimes very troublesome to detect as a result of the TCP connection seems to be fairly just like regular requests. Most probably, the developer makes use of this botnet to supply a service to run DDOS,” Zimperium states.
Who operates Cloud9?
The C2 domains used within the present Cloud9 marketing campaign have been beforehand utilized by the Keksec malware group, suggesting a connection, explains Bleeping Laptop. Keksec operates the EnemyBot, Tsunamy, Gafgyt, DarkHTTP, DarkIRC, and Necro botnets. Cloud9’s victims are worldwide, and pictures from the menace actor discussion board present that they aim many browsers.
The complete report on the malicious Cloud9 extension is accessible right here.
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Malicious Extension Grants Threat Actors Remote Access to Google Chrome
