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  • Killnet DDoS attacks on the US medical sector had little effect


    Cybersecurity experts argue that the incident was large-scale, but its consequences are insignificant.

    The U.S. Cybersecurity and Infrastructure Security Agency (CISA) said it helped dozens of hospitals respond to last week's series of DDoS attacks, for which the notorious hacker group Killnet claimed responsibility.

    CISA representatives said the attacks temporarily reduced the availability of hospital websites, but there were no reports of unauthorized access to hospital networks, interruptions in medical care, or impact on patient safety.

    The Killnet hacker group has been periodically attacking European and American organizations in various fields for several months now. For the past month, their attacks have been directed specifically at the medical sector. In November, they were accused of attacking the website of the European Parliament, and in October - on the websites of American airports.

    In their Telegram channel, the hackers announced the launch of DDoS attacks on hospitals in more than 25 states. According to the CISA, less than half of these attacks were successful and completely took down websites. Basically, access to them was present, albeit with speed limits.

    Despite the fact that the consequences of the attack are not very serious, no one denies their scale. Cloudflare experts said that Killnet attacks are not carried out by means of one botnet, but several at once. That is, Killnet operators seek help from other groups and individuals to expand the scope of their attack. This is true, judging by the messages in the group's Telegram channel. Killnet regularly recruits "colleagues" to carry out joint attacks. Some media outlets even refer to the group as a "global hacker religion".

    Cloudflare also said attacks have come in several waves over the past week and have so far been relatively small, ranging from 10,000 to 100,000 HTTP requests per second (RPS). The largest attack on one of the websites was 1.6 million RPS, and its peak lasted less than 10 seconds, while the entire attack on this site took no more than six minutes.

    The U.S. Department of Health and Human Services even issued a warning at the end of January that some DDoS incidents could eventually lead to the use of ransomware by attackers. So far, no such cases have been recorded, and the attacks were aimed only at temporarily disrupting the performance of sites. Whether Killnet will continue to stick to this strategy, only time will tell.

    Author DeepWeb
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