#ZyxelFirewalls

Helldown ransomware exploits Zyxel VPN flaw to breach networks

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November 19, 2024 at 12:03PM The ‘Helldown’ ransomware operation targets vulnerabilities in Zyxel firewalls, enabling data theft and device encryption. Newly documented, it has quickly amassed victims, primarily small to medium-sized firms. Recent findings indicate potential exploitation of a specific Zyxel vulnerability, with ongoing investigations into its tactics and payloads. **Meeting Takeaways: Helldown Ransomware Operation … Read more

22 Energy Firms Hacked in Largest Coordinated Attack on Denmark’s Critical Infrastructure

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November 14, 2023 at 07:09AM Hackers launched a coordinated attack on 22 energy organizations in Denmark’s critical infrastructure. The attack, which occurred in May 2023, involved compromising victim organizations within a few days. The hackers exploited vulnerabilities in Zyxel firewalls and gained complete control over the impacted systems. The attacks were observed to have been … Read more

Inside Denmark’s hell week as critical infrastructure orgs faced cyberattacks

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November 13, 2023 at 09:41AM Denmark experienced its largest-ever online attack on critical infrastructure in May, according to a report from SektorCERT. The attack affected 22 companies, with some forced to disconnect from the power network. Unpatched vulnerabilities in Zyxel firewalls were exploited, potentially by multiple groups including Russia’s Chief Intelligence Office. The attacks were … Read more