botnet | Breaking Cybersecurity News | The Hacker News

Cybersecurity researchers are calling attention to a malware campaign that's targeting security flaws in TBK digital video recorders (DVRs) and Four-Faith routers to rope the devices into a new botnet called RondoDox . The vulnerabilities in question include CVE-2024-3721 , a medium-severity command injection vulnerability affecting TBK DVR-4104 and DVR-4216 DVRs, and CVE-2024-12856 , an operating system (OS) command injection bug affecting Four-Faith router models F3x24 and F3x36. Many of these devices are installed in critical environments like retail stores, warehouses, and small offices, where they often go unmonitored for years. That makes them ideal targets—easy to exploit, hard to detect, and usually exposed directly to the internet through outdated firmware or misconfigured ports. It's worth noting that all three security defects have been repeatedly weaponized by threat actors to deploy different Mirai botnet variants in recent months. "Both [the security f...

If you didn't hear about  Iranian hackers breaching US water facilities, it's because they only managed to control a single pressure station serving 7,000 people. What made this attack noteworthy wasn't its scale, but how easily the hackers gained access — by simply using the manufacturer's default password "1111." This narrow escape prompted  CISA to urge manufacturers to eliminate default credentials entirely, citing "years of evidence" that these preset passwords remain one of the most exploited weaknesses. While we wait for manufacturers to implement better security practices, the responsibility falls on IT teams. Whether you manage critical infrastructure or a standard business network, allowing unchanged manufacturer passwords in your environment is like rolling out the red carpet for attackers. Here's what you need to know about default passwords — why they persist, their business and technical consequences, and how manufacturers can imple...

Threat actors are weaponizing exposed Java Debug Wire Protocol ( JDWP ) interfaces to obtain code execution capabilities and deploy cryptocurrency miners on compromised hosts. "The attacker used a modified version of XMRig with a hard-"coded configuration, allowing them to avoid suspicious command-line arguments that are often flagged by defenders," Wiz researchers Yaara Shriki and Gili Tikochinski said in a report published this week. "The payload used mining pool proxies to hide their cryptocurrency wallet address, thereby preventing investigators from pivoting on it." The cloud security firm, which is being acquired by Google Cloud, said it observed the activity against its honeypot servers running TeamCity, a popular continuous integration and continuous delivery (CI/CD) tool. JDWP is a communication protocol used in Java for debugging purposes. With JDWP, users can leverage a debugger to work in a different process, a Java application, on the same com...

Cybersecurity researchers have detailed two novel methods that can be used to disrupt cryptocurrency mining botnets. The methods take advantage of the design of various common mining topologies in order to shut down the mining process , Akamai said in a new report published today. "We developed two techniques by leveraging the mining topologies and pool policies that enable us to reduce a cryptominer botnet's effectiveness to the point of completely shutting it down, which forces the attacker to make radical changes to their infrastructure or even abandon the entire campaign," security researcher Maor Dahan said . The techniques, the web infrastructure company said, hinge on exploiting the Stratum mining protocol such that it causes an attacker's mining proxy or wallet to be banned, effectively disrupting the operation. The first of the two approaches, dubbed bad shares, entails banning the mining proxy from the network, which, in turn, results in the shutdow...

Cloudflare on Thursday said it autonomously blocked the largest distributed denial-of-service (DDoS) attack ever recorded, which hit a peak of 7.3 terabits per second (Tbps). The attack, which was detected in mid-May 2025, targeted an unnamed hosting provider. "Hosting providers and critical Internet infrastructure have increasingly become targets of DDoS attacks," Cloudflare's Omer Yoachimik said . "The 7.3 Tbps attack delivered 37.4 terabytes in 45 seconds." Earlier this January, the web infrastructure and security company said it had mitigated a 5.6 Tbps DDoS attack aimed at an unnamed internet service provider (ISP) from Eastern Asia. The attack originated from a Mirai-variant botnet in October 2024. Then in April 2025, Cloudflare revealed it defended against a massive 6.5 Tbps flood that likely emanated from Eleven11bot, a botnet comprising roughly 30,000 webcams and video recorders. The hyper-volumetric attack lasted about 49 seconds. The 7.3 Tbps...