Latest coverage for DoS

DOJ Says KimWolf Powered Massive DDoS-for-Hire OperationsU.S. prosecutors charged a Canadian man accused of operating the KimWolf botnet, alleging the DDoS-for-hire platform compromised nearly two million IoT devices and powered attacks that reached record traffic volumes worldwide.

Akamai Links Attack Growth to AI-Enabled Botnets and HacktivistsAkamai says AI-enabled botnets, geopolitical hacktivism and financially motivated cybercriminals drove a massive rise in DDoS, API and web attacks against global financial services firms in 2025, with banks suffering the majority of incidents.

Also, Taiwan Rail Hack, Massive DDoS Attack and Karakurt Jail SentenceThis week, Microsoft Edge exposed passwords, Taiwan police make arrests in high-speed rail hack and a 2.45 billion-request DDoS attack. A Karakurt negotiator jailed, North Korean IT worker scams led to prison terms and France detained a teen over a government data breach. Another Ivanti zero-day.

Also, Europol Cracks DDoS Networks, Mythos Finds Bugs, France Portal HitThis week, scam compounds. Attackers exploit flaws pre-disclosure. A crackdown on DDoS-for-hire. No Mythos for CISA, yes for Mozilla. France ID portal breach. Israeli and Venezuelan critical infrastructure targeted. Russian hacking in Ukraine. An Apache flaw. A ransomware negotiator aided BlackCat.

Researcher: If Exploited, Bug Could Crash Hospital Medical Imaging SystemsThe Cybersecurity Infrastructure and Security Agency is warning of a high severity in Grassroots DICOM, an open-source library commonly used for medical imaging products, that if exploited could allow an attacker to send a specially crafted file resulting in a denial-of-service situation.

ENISA's de Vries on DDoS, Security Training and Road to Single Reporting PlatformEurope's cybersecurity posture is hardening, but the threat landscape is evolving faster, says Hans de Vries, chief cybersecurity and operations officer at ENISA. From supply chain disruptions to ransomware legislation, the pressure to build genuinely resilient societies has never been greater.

Also, More ClickFix Attacks and Teen Booters Arrested in PolandThis week, Russian hackers targeted Signal and WhatsApp users, permit-fee phishing hit U.S. applicants, ClickFix on WordPress sites, Microsoft patched 80 bugs, a 14K-router botnet, Polish teens held over DDoS tools and Finland warned of Russian, Chinese espionage. North Korean IT workers for hire.

Experts Warn of DDoS, Ransomware, Proxy And Other Attacks on Health SectorThe escalating conflict emerging from the U.S. and Israel military strikes this weekend on Iran, which killed the country's top leadership and crippled its internet connectivity, could erupt into cyberattacks against the healthcare sector by Iranian sympathizers and proxies, experts warn.

2 More Vulnerabilities Need Patching in React Server Components, Warns VercelMass exploitation of the "React2Shell" - CVE-2025-55182 - vulnerability remains underway by nation-state hackers tied to China, North Korea and Iran, as well as financially motivated cybercriminals running everything from cryptomining malware to DDoS services, security experts warn.

Also: npm Packages Infiltrated, FBI Issues Fraud Alert, Campbell's Soup Cans CISOThis week, a recently fixed Oracle flaw is being actively exploited, Shelly tackled Pro 4PM DoS bug, "Shai-Hulud 2.0" hit npm, the FBI warned of rising bank account takeover scams, regulators fined Comcast over a vendor breach, Iberia reported a supplier incident and Campbell's canned its CISO.

22-Year-Old Oregon Man Charged With Selling DDoS Attacks Using Mirai VariantFederal prosecutors have charged Oregon man Ethan Foltz, 22, with administering an on-demand service for disrupting websites called "Rapper Bot." Resulting distributed-denial-of-service attacks disrupted DeepSeek and X, as well as the U.S. Department of Defense, which is leading the investigation.

'Bless Their Heart,' Says Threat Intel Executive of Pro-Iranian GroupSecurity experts have dismissed pro-Iranian hacktivist group LulzSec Black's claim to have breached Indian nuclear secrets in reprisal for the country's support of Israel. Pro-Iran hacktivist groups' SCADA-targeting, DDoS launching, data leaking and nuisance-level activities have surged.

Geopolitical Conflict Involving Iran, Israel, US Ripe for Attacks on SectorGovernment authorities are warning of increased risk of Iranian cyber and related threats against healthcare and public health sector organizations - including ransomware, distributed denial-of-service and other attacks related to that nation's escalated conflicts with Israel and the U.S.

Analysts Warn US Infrastructure May Be Next as Iran Plans Missile Strike ResponseIsrael’s strike on Iranian military and nuclear targets has triggered fears of retaliatory cyberattacks, with analysts warning that Tehran may escalate disruptions against U.S. and Israeli critical infrastructure through proxy campaigns, brute-force attacks or coordinated DDoS strikes.

Sites Sold Distributed Denial-of-Service Attacks for as Little as $11, Police SayPolice in Poland arrested four individuals suspected of serving as administrators for six prolific but now defunct stresser/booter services - Cfxapi, Cfxsecurity, neostress, jetstress, quickdown and zapcut - which sold distributed denial-of-service attacks on demand.

Also: Gartner's Sydney Summit Highlights, Rising OT Security RisksIn this week's update, ISMG editors discussed X’s major DDoS outages, politically motivated cyberattacks, key takeaways from Gartner’s Security & Risk Summit in Sydney, and rising operational technology threats highlighted in recent Dragos and Gartner reports.

Experts Express Surprise Over Major Social Platform Falling Victim to DDoS AttacksOne of the world's biggest social networks continued to face intermittent outages Tuesday, apparently due to unsophisticated, distributed denial-of-service attacks. Experts said the attacks were traced to malware-infected devices - many based in the U.S. - and pro-Palestinian hacktivists.

'Dark Storm Team" Takes Responsibility for 4 Major Outages on MondayRepeated outages Monday on social media platform X - formerly Twitter - are the result of a distributed denial of service attack, asserted platform owner Elon Musk in a sporadically available tweet. The social media platform experienced four significant outages.

Self-Described Hacktivists Appear to Remain Moscow Foreign Policy ExtensionRussia's use of high-profile online nuisance attacks as a psychology ploy designed to amplify Moscow's geopolitical agenda continues. As Europe has rallied to support Ukraine, self-proclaimed Russian hacktivists have trumpeted their targeting of the U.K. and EU member states, instead of the U.S.

Self-Described Hacktivists Appear to Remain Moscow Foreign Policy ExtensionRussia's use of high-profile online nuisance attacks as a psychology ploy designed to amplify Moscow's geopolitical agenda continues. As Europe has rallied to support Ukraine, self-proclaimed Russian hacktivists have trumpeted their targeting of the U.K. and EU member states, instead of the U.S.