Ransomware encrypts or steals data to disrupt operations and extort victims, making backups, access controls, and incident response essential.
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Background for this topic.
Ransomware is malware used to deny access to systems or data, usually by encrypting files and demanding payment for decryption. Many operations also steal sensitive information and threaten to publish it, so an attack can create both an availability crisis and a privacy or disclosure risk. Initial access may involve phishing, stolen credentials, exposed remote services, or exploitation of unpatched vulnerabilities; attackers may then move through the network before deploying the payload.
Defenses should combine vulnerability management, phishing-resistant authentication where practical, endpoint and network monitoring, and backups that are isolated from routine administrator access and regularly tested for recovery. Organizations should also limit privileges and segment critical systems to reduce the blast radius. An incident requires rapid containment, preservation of forensic evidence, restoration from known-good backups, and assessment of notification, legal, and regulatory obligations. Threat intelligence can help identify relevant criminal infrastructure or tactics, but it does not replace sound access control, patching, detection, and recovery practices.
Researchers have created a decryptor that exploits a flaw in Black Basta ransomware, allowing victims to recover their files for free. [...]
It's been a quiet week, with even threat actors appearing to take some time off for the holidays. We did not see much research released on ransomware this week, with most of the news focusing on new attacks and LockBit affiliates increasingly targeting hospitals. [...]
Two not-for-profit hospitals in New York are seeking a court order to retrieve data stolen in an August ransomware attack that's now stored on the servers of a Boston cloud storage company. [...]
The Ohio Lottery was forced to shut down some key systems after a cyberattack affected an undisclosed number of internal applications on Christmas Eve. [...]
German hospital network Katholische Hospitalvereinigung Ostwestfalen (KHO) has confirmed that recent service disruptions were caused by a Lockbit ransomware attack where the threat actors gained access to IT systems and encrypted devices on the network. [...]