Ransomware encrypts or steals data to disrupt operations and extort victims, making backups, access controls, and incident response essential.
Search across headline titles and summaries.
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.
After the U.S. Cybersecurity and Infrastructure Security Agency (CISA) released a decryptor for affected victims to recover from ESXiArgs ransomware attacks, the threat actors have bounced back with an updated version that encrypts more data
State-backed hackers from North Korea are conducting ransomware attacks against healthcare and critical infrastructure facilities to fund illicit activities, U.S. and South Korean cybersecurity and intelligence agencies warned in a joint advisory
Here are three of the worst breaches, attacker tactics and techniques of 2022, and the security controls that can provide effective, enterprise security protection for them
In a first-of-its-kind coordinated action, the U.K. and U.S. governments on Thursday levied sanctions against seven Russian nationals for their affiliation to the TrickBot, Ryuk, and Conti cybercrime operation
A single ransomware attack on a New Zealand managed service provider (MSP) disrupted several of its clients' business operations overnight, most belonging to the healthcare sector. According to the country's privacy commissioner, "a cyber security incident involving a ransomware attack" in late November upended the daily operations of New Zealand's health ministry when it prevented the staff
A Russian national on February 7, 2023, pleaded guilty in the U.S. to money laundering charges and for attempting to conceal the source of funds obtained in connection with Ryuk ransomware attacks
With cyberattacks around the world escalating rapidly, insurance companies are ramping up the requirements to qualify for a cyber insurance policy. Ransomware attacks were up 80% last year, prompting underwriters to put in place a number of new provisions designed to prevent ransomware and stem the record number of claims. Among these are a mandate to enforce multi-factor authentication (MFA)
The first-ever Linux variant of the Clop ransomware has been detected in the wild, but with a faulty encryption algorithm that has made it possible to reverse engineer the process
VMware on Monday said it found no evidence that threat actors are leveraging an unknown security flaw, i.e., a zero-day, in its software as part of an ongoing ransomware attack spree worldwide