Researchers have disclosed a pair of denial-of-service attacks called "CDN Tsunami" that exploit HTTP/3 to HTTP/1.1 translation in major CDNs, achieving amplification factors of up to 350x against origin servers. The vulnerability stems from how content delivery networks convert client-facing HTTP/3 traffic into backend HTTP/1.1 requests, allowing attackers to magnify relatively modest bandwidth into devastating attacks on protected websites. The attacks were evaluated against multiple major CDN providers.
Read full article at The Hacker News ↗Plus: Apple sends out an “unprecedented” number of spyware warnings, Ukraine hits a Russian ecommerce giant with cyber and drone attacks, and more.
Three banking trojans are currently active threats: Manic, which incorporates spyware capabilities; Grandoreiro, which maintains persistent campaigns targeting victims in Latin America and Europe; and ToxicPanda 2.0, an expanded variant of the ToxicPanda malware. Security professionals should monitor these banking trojans as they demonstrate ongoing development and geographic targeting sophistication.
Researchers at KnowBe4 have identified a new variant of Agent Tesla malware employing innovative emoji-based code obfuscation techniques to bypass security detection systems. This v4 iteration represents an advancement in the malware's evasion capabilities, demonstrating attackers' ongoing efforts to stay ahead of traditional threat detection methods.
Threat actors are leveraging the popularity of AI tools by impersonating well-known brands like Perplexity, Claude, ChatGPT, and Copilot to distribute malware including information stealers, backdoors, and malicious browser extensions. According to Sophs' analysis of 12 months of managed detection and response cases, 34 confirmed instances of malicious AI-related activity were identified, demonstrating the effectiveness of AI brand impersonation as a social engineering vector.