serisec

Category: DDoS

  • Massive 2.45B-Request DDoS Attack Used 1.2 Million IPs to Evade Rate Limits

    Massive 2.45B-Request DDoS Attack Used 1.2 Million IPs to Evade Rate Limits Distributed Denial of Service (DDoS) campaign targeted a large-scale user-generated content platform, unleashing over 2.45 billion malicious requests in just five hours. Rather than relying on brute-force methods, the attackers distributed traffic across 1.2 million unique IP addresses. This structural shift exposed a fundamental…

  • Anti-DDoS Firm Heaped Attacks on Brazilian ISPs

    Anti-DDoS Firm Heaped Attacks on Brazilian ISPs 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…

  • Free parking in Russia after Distributed Denial-of-Service attack knocks city’s parking system offline

    Free parking in Russia after Distributed Denial-of-Service attack knocks city’s parking system offline Drivers in the Russian city of Perm have been enjoying an unexpected bonus this week: free parking. Not because the city council suddenly decided to embrace generosity – but rather because hackers succeeded in knocking the city’s payment system offline. Read more…

  • Smashing Security podcast #456: How to lose friends and DDoS people

    Smashing Security podcast #456: How to lose friends and DDoS people When the mysterious operator of an internet archiving-service decided to silence a curious Finnish blogger, they didn’t just send a stroppy email – they allegedly weaponised their own CAPTCHA page to launch a DDoS attack, threatened to invent an entirely new genre of AI…

  • Kimwolf Botnet Swamps Anonymity Network I2P

    Kimwolf Botnet Swamps Anonymity Network I2P For the past week, the massive “Internet of Things” (IoT) botnet known as Kimwolf has been disrupting 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…

  • Pro-Russian denial-of-service attacks target UK, NCSC warns

    Pro-Russian denial-of-service attacks target UK, NCSC warns The UK’s National Cyber Security Centre (NCSC) has issued a warning about the threat posed by distributed denial-of-service (DDoS) attacks from Russia-linked hacking groups who are reported to be continuing to target British organisations. Are you prepared? Read more in my article on the Hot for Security blog.…

  • Why the record-breaking 30 Tbps DDoS attack should concern every business

    Why the record-breaking 30 Tbps DDoS attack should concern every business A new warning about the threat posed by Distributed Denial of Service (DDoS) attacks should make you sit up and listen. Read more in my article on the Fortra blog. Graham Cluley Go to grahamcluley

  • DDoS Botnet Aisuru Blankets US ISPs in Record DDoS

    DDoS Botnet Aisuru Blankets US ISPs in Record DDoS The world’s largest and most disruptive botnet is now drawing a majority of its firepower from compromised Internet-of-Things (IoT) devices hosted on U.S. Internet providers like AT&T, Comcast and Verizon, new evidence suggests. Experts say the heavy concentration of infected devices at U.S. providers is complicating…

  • 22.2 Tbps DDoS Attack Breaks Internet With New World Record

    22.2 Tbps DDoS Attack Breaks Internet With New World Record Cloudflare announced it had autonomously mitigated the largest distributed denial-of-service (DDoS) attack ever recorded. The hyper-volumetric attack peaked at an unprecedented 22.2 terabits per second (Tbps) and 10.6 billion packets per second (Bpps), setting a new and alarming benchmark for the scale of cyber threats.…

  • DDoS Mitigation Provider targeted In 1.5 Gpps 1.5 Billion Packets per Second DDoS Attack

    DDoS Mitigation Provider targeted In 1.5 Gpps 1.5 Billion Packets per Second DDoS Attack FastNetMon, a prominent provider of DDoS detection solutions, announced this week that it had identified and helped mitigate a record-breaking distributed denial-of-service (DDoS) attack. The assault targeted a major DDoS scrubbing vendor located in Western Europe, pushing packet-forwarding rates to an…

  • Europol targets Kremlin-backed cybercrime gang NoName057(16)

    Europol targets Kremlin-backed cybercrime gang NoName057(16) The hacking group NoName057(16) has been operating since 2022, launching cyber attacks on government organisations, media bodies, critical infrastructure, and private companies in Ukraine, America, Canada, and across Europe in a seeming attempt to silence voices that the group considers anti-Russian. Read more in my article on the Hot…

  • Record Breaking 7.3 Tbps DDoS Attack Blasting 37.4 Terabytes in Just 45 Seconds

    Record Breaking 7.3 Tbps DDoS Attack Blasting 37.4 Terabytes in Just 45 Seconds The largest distributed denial-of-service (DDoS) attack ever documented was successfully stopped by Cloudflare in mid-May 2025, with attackers unleashing a devastating 7.3 terabits per second (Tbps) attack that delivered 37.4 terabytes of malicious traffic in just 45 seconds.  Summary 1. Cloudflare blocked…

  • Sweden says it is under cyber attack

    Sweden says it is under cyber attack Swedish Prime Minister Ulf Kristersson says his country is under attack, after days of hard-hitting DDoS attacks against SVT Sweden’s public TV broadcaster, government websites, and other key organisations. Graham Cluley Go to grahamcluley

  • KrebsOnSecurity Hit With Near-Record 6.3 Tbps DDoS

    KrebsOnSecurity Hit With Near-Record 6.3 Tbps DDoS KrebsOnSecurity last week was hit by a near record distributed denial-of-service (DDoS) attack that clocked in at more than 6.3 terabits of data per second (a terabit is one trillion bits of data). The brief attack appears to have been a test run for a massive new Internet…

  • 27 DDoS-for-hire services disrupted in run-up to holiday season

    27 DDoS-for-hire services disrupted in run-up to holiday season Operation PowerOFF has disrupted what was anticipated to be a surge of distributed denial-of-service (DDoS) attacks over the Christmas period by taking over two dozen “booter” or “stresser” websites offline. Read more in my article on the Tripwire State of Security blog. Graham Cluley Go to…

  • Smashing Security podcast #396: Dishy DDoS dramas, and mining our minds for data

    Smashing Security podcast #396: Dishy DDoS dramas, and mining our minds for data A CEO is arrested for turning satellite receivers into DDoS attack weapons! Then, we’ll journey into the world of bossware and “affective computing” and explore how AI is learning to read our emotions – is this the future of work, or a…