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Routers typically resolve DNS requests sent by all computers on a local network by forwarding them to the DNS servers configured in its settings. When users visit these pages, the tool will start probing LAN addresses commonly used by routers through their browsers and, if it receives a response, it will attempt to login using default usernames and passwords and then change the router’s DNS settings using a CSRF technique. Unfortunately, the web interfaces of SOHO routers generally lack such CSRF defenses.Īttackers inject the Novidade exploit into malicious advertisements, compromised websites or attack pages distributed through instant messaging applications. A remote website cannot read this token from the user’s browser, so it won’t be able to construct legitimate requests. Preventing such attacks typically is done by adding a unique, random token to every page that has to accompany any request sent by the user. Novidade executes cross-site request forgery (CSRF) attacks that force the browser of a website visitor to execute some action on another website where the user is already authenticated-in this case, their local router’s web-based administration interface. However, we also recently found campaigns with no specific target geolocation, suggesting that either the attackers are expanding their target areas or a larger number of threat actors are using it.”
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“Most of the campaigns we discovered used phishing attacks to retrieve banking credentials in Brazil.
Small business routers 2017 code#
“One possibility is that the exploit kit tool was either sold to multiple groups or the source code was leaked, allowing threat actors to use the kit or create their own variations,” the Trend Micro researchers said in a blog post.