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A Brazilian tech firm that specializes in protecting networks from distributed denial-of-service (DDoS) attacks has been enabling a botnet responsible for an extended campaign of massive DDoS attacks against other network operators in Brazil, KrebsOnSecurity has learned. The firm’s chief executive says the malicious activity resulted from a security breach and was likely the work of a competitor trying to tarnish his company’s public image.
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The U.S. Justice Department joined authorities in Canada and Germany in dismantling the online infrastructure behind four highly disruptive botnets that compromised more than three million hacked Internet of Things (IoT) devices, such as routers and web cameras. The feds say the four botnets — named Aisuru, Kimwolf, JackSkid and Mossad — are responsible for a series of recent record-smashing distributed denial-of-service (DDoS) attacks capable of knocking nearly any target offline.
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In early January 2026, KrebsOnSecurity revealed how a security researcher disclosed a vulnerability that was used to assemble Kimwolf, the world’s largest and most disruptive botnet. Since then, the person in control of Kimwolf — who goes by the handle “Dort” — has coordinated a barrage of distributed denial-of-service (DDoS), doxing and email flooding attacks against the researcher and this author, and more recently caused a SWAT team to be sent to the researcher’s home. This post examines what is…
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For the past week, the massive “Internet of Things” (IoT) botnet known as Kimwolf has been disrupting the The Invisible Internet Project (I2P), a decentralized, encrypted communications network designed to anonymize and secure online communications. I2P users started reporting disruptions in the network around the same time the Kimwolf botmasters began relying on it to evade takedown attempts against the botnet’s control servers.
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A new Internet-of-Things botnet called Kimwolf has spread to more than 2 million devices, forcing infected systems to participate in massive distributed denial-of-service (DDoS) attacks and to relay other malicious and abusive Internet traffic. Kimwolf’s ability to scan the local networks of compromised systems for other IoT devices to infect makes it a sobering threat to organizations, and new research reveals Kimwolf is surprisingly prevalent in government and corporate networks.
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Our first story of 2026 revealed how a destructive new botnet called Kimwolf rapidly grew to infect more than two million devices by mass-compromising a vast number of unofficial Android TV streaming boxes. Today, we’ll dig through digital clues left behind by the hackers, network operators, and cybercrime services that appear to have benefitted from Kimwolf’s spread.
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3XK Tech GmbH, A Little Sunshine, Aisuru, AT&T, Benjamin Brundage, Breadcrumbs, ByteConnect, Cassidy Hales, DDoS-for-Hire, Dort, Ethereum Name Service, Flashpoint, Forky, Friedrich Kraft, GreyNoise Intelligence, Internet of Things (IoT), Julia Levi, Kimwolf, Linus, Maskify, Ne’er-Do-Well News, Plainproxies, Resi Rack LLC, Shox, Snow, Synthient, XLab¶¶¶¶¶
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The story you are reading is a series of scoops nestled inside a far more urgent Internet-wide security advisory. The vulnerability at issue has been exploited for months already, and it’s time for a broader awareness of the threat. The short version is that everything you thought you knew about the security of the internal network behind your Internet router probably is now dangerously out of date.
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911s5, 922 Proxy, A Little Sunshine, Aisuru, AISURU Botnet, Akamai Technologies, Android Debug Bridge, BadBox 2.0, Ben Brundage, Chad Seaman, DDoS-for-Hire, HUMAN Security, IPidea, Kimwolf, Kimwolf botnet, krebsfiveheadindustries, Latest Warnings, Lindsay Kaye, Oxylabs, Quokka, residential proxy, Riley Kilmer, Spur, Synthient, Uhale app, Web Fraud 2.0, XLab¶¶¶¶¶
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