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.
The Abyss Locker operation is the latest to develop a Linux encryptor to target VMware's ESXi virtual machines platform in attacks on the enterprise. [...]
With ransom payments declining, ransomware gangs are evolving their extortion tactics to utilize new methods to pressure victims. [...]
The Hawaiʻi Community College has admitted that it paid a ransom to ransomware actors to prevent the leaking of stolen data of approximately 28,000 people. [...]
A new 'Nitrogen' initial access malware campaign uses Google and Bing search ads to promote fake software sites that infect unsuspecting users with Cobalt Strike and ransomware payloads. [...]
The ALPHV ransomware gang, also referred to as BlackCat, is trying to put more pressure on their victims to pay a ransom by providing an API for their leak site to increase visibility for their attacks. [...]
The Clop ransomware gang is copying an ALPHV ransomware gang extortion tactic by creating Internet-accessible websites dedicated to specific victims, making it easier to leak stolen data and further pressuring victims into paying a ransom. [...]