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Weekly Cybersecurity Report | Week 16, 2025
Information security updates and events from the past week
1 – DaVita, a dialysis service provider across the US, reports a ransomware attack that began two days ago.
The attack encrypted parts of the company’s computer systems and caused operational disruptions. The company reports that it has isolated the affected systems and is using external cyber experts to investigate the incident.
The attack caused various disruptions, but medical treatments continue.
No ransomware group has claimed responsibility for the attack at this stage.
2 – South African telecommunications company Cell C confirms that it has fallen victim to a ransomware attack carried out by the RansomHouse group.
The group claims to have stolen 2 terabytes of data including names, ID numbers, bank details, passports, driver’s licenses, medical details and contact information of the company’s customers.
Cell C said it is working with cyber experts and law enforcement authorities to address the incident.
3 – Morocco is investigating A cyberattack on the National Insurance Institute (CNSS), in which more than 54,000 files containing personal information of almost two million citizens were leaked.
The leaked information includes names, ID numbers, bank details, email addresses and telephone numbers. The files were published on Telegram and uploaded to various forums for download.
The hacker group JabaROOT claimed responsibility for the attack and claimed that it was a response to Moroccan cyber operations against institutions in Algeria.
4 – Sensata Technologies, which manufactures and markets various sensors and technological products, reports that it is suffering from a ransomware attack.
In a report published by the company on the stock exchange, it states that an initial investigation indicates that information was stolen from the organizational network but that there is no impact on business activity.
No ransomware group has claimed responsibility for the attack so far.
5 – Germany accuses Russia of cyberattack on its research institute
The German government accuses the Russian attack group APT28 (linked to the GRU, military intelligence) of a cyberattack on the GIGA research institute in Hamburg.
The hack involved the use of an old vulnerability in Outlook (CVE-2023-23397), which allowed the attackers to access internal systems.
The goal was not just technical espionage, but an attempt to access materials related to German foreign policy and analysis of sanctions on Russia.
In other words – targeted academic espionage in wartime.
Germany summoned the Russian ambassador and warned that there would be a diplomatic response.
According to the German Foreign Ministry – this is a serious violation of sovereignty, and the attack was aimed at research institutions of a scientific nature
The cybersecurity attacks highlighted in this report aren’t just incidents, they’re blueprints of the adversary’s arsenal. To protect your business you need the right partner. Cyberone is here to help! Check out our services.
