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.
This week has been a busy ransomware week, with ransomware attacks having a massive impact on organizations and the fallout of the MOVEit breaches to be disclosed. [...]
The FBI has warned about a new trend in ransomware attacks where multiple strains are deployed on victims' networks to encrypt systems in under two days. [...]
Johnson Controls International has suffered what is described as a massive ransomware attack that encrypted many of the company devices, including VMware ESXi servers, impacting the company's and its subsidiaries' operations. [...]
Hackers are actively exploiting a high-severity vulnerability in Openfire messaging servers to encrypt servers with ransomware and deploy cryptominers. [...]
Security researchers have identified infrastructure belonging to a threat actor now tracked as ShadowSyndicate, who likely deployed seven different ransomware families in attacks over the past year. [...]
The Better Outcomes Registry & Network (BORN), a healthcare organization funded by the government of Ontario, has announced that it is among the victims of Clop ransomware's MOVEit hacking spree. [...]