Latest cybersecurity reporting from selected sources.

Signs Point to Long-Active 'Sandworm' Military Intelligence Hackers at WorkRussian cyberattacks in late December 2025 that attempted to disrupt Poland's power grid have been attributed to "Sandworm," the codename for an advanced persistent threat group tied to a Moscow military intelligence unit that repeatedly uses wiper malware, including in these attacks.

A cyberattack targeting Poland's power grid in late December 2025 has been linked to the Russian state-sponsored hacking group Sandworm, which attempted to deploy a new destructive data-wiping malware dubbed DynoWiper during the attack.. [...]

Water tank overflowed during one system malfunction, says Mandiant The Russian military's notorious Sandworm crew was likely behind cyberattacks on US and European water plants that, in at least one case, caused a tank to overflow.…

But even with that focus, the sophisticated threat group has continued operations against targets globally, including the US, says Google's Mandiant.

The cyber attacks targeting the energy sector in Denmark last year may not have had the involvement of the Russia-linked Sandworm hacking group, new findings from Forescout show

Nation-State Hackers Blamed for Severing Communications to 24 Million CitizensUkraine's security intelligence chief said Russian hackers had been responsible for severing internet access and mobile communications from telecom operator Kyivstar in December, after compromising the firm's network months ago. He said the "disastrous" cyberattack had wiped "almost everything."

After Sandworm and APT28 (known as Fancy Bear), another state-sponsored Russian hacker group, APT29, is leveraging the CVE-2023-38831 vulnerability in WinRAR for cyberattacks. [...]

Online attack coincided with major military action, Mandiant says Blackouts in Ukraine last year were not just caused by missile strikes on the nation but also by a seemingly coordinated cyberattack on one of its power plants. That's according to Mandiant's threat intel team, which said Russia's Sandworm crew was behind the two-pronged power-outage and data-wiping attack.…

The Computer Emergency Response Team of Ukraine (CERT-UA) on Tuesday disclosed that it thwarted a cyberattack by Sandworm, a hacking group affiliated with Russia's military intelligence, to sabotage the operations of an unnamed energy provider in the country

Threat actor groups like Wizard Spider and Sandworm have been wreaking havoc over the past few years – developing and deploying cybercrime tools like Conti, Trickbot, and Ryuk ransomware. Most recently, Sandworm (suspected to be a Russian cyber-military unit) unleashed cyberattacks against Ukranian infrastructure targets