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.
Two new extortion gangs named 'TommyLeaks' and 'SchoolBoys' are targeting companies worldwide. However, there is a catch — they are both the same ransomware gang. [...]
A new Windows zero-day allows threat actors to use malicious JavaScript files to bypass Mark-of-the-Web security warnings. Threat actors are already seen using the zero-day bug in ransomware attacks. [...]
Cybersecurity researchers did not disappoint, with reports linking RansomCartel to REvil, on OldGremlin hackers targeting Russia with ransomware, a new data exfiltration tool used by BlackByte, a warning that ransomware actors are exploiting VMware vulnerabilities, and finally, our own report on the Venus Ransomware. [...]
CISA, the FBI, and the Department of Health and Human Services (HHS) warned that a cybercrime group known as Daixin Team is actively targeting the U.S. Healthcare and Public Health (HPH) Sector sector in ransomware attacks. [...]
Security researchers observed malicious campaigns leveraging a critical vulnerability in VMware Workspace One Access to deliver various malware, including the RAR1Ransom tool that locks files in password-protected archives. [...]
Security researchers observed malicious campaigns leveraging a critical vulnerability in VMware Workspace One Access to deliver various malware, including the RAR1Ransom tool that locks files in password-protected archives. [...]
A now-patched vulnerability in VMware Workspace ONE Access has been observed being exploited to deliver both cryptocurrency miners and ransomware on affected machines
And one designed to slip ransomware and data-stealing code onto infected machines URSNIF, the malware also known as Gozi that attempts to steal online banking credentials from victims' Windows PCs, is evolving to support extortionware.…
A BlackByte ransomware affiliate is using a new custom data stealing tool called 'ExByte' to steal data from compromised Windows devices quickly. [...]
Ransom demands soar to $17m, according to new report
The data also shows ransomware groups continuing to grow in volume and sophistication
A Russian-speaking ransomware group dubbed OldGremlin has been attributed to 16 malicious campaigns aimed at entities operating in the transcontinental Eurasian nation over the course of two and a half years
OldGremlin, one of the few ransomware groups attacking Russian corporate networks, has expanded its toolkit with file-encrypting malware for Linux machines. [...]
It will focus on protecting suppliers to critical information infrastructure operators
CISOs and security leaders in state and local governments are dealing with increasing threats like ransomware — with varying degrees of cyber maturity.
The Ursnif malware has become the latest malware to shed its roots as a banking trojan to revamp itself into a generic backdoor capable of delivering next-stage payloads, joining the likes of Emotet, Qakbot, and TrickBot
Ransomware accounts for 75% of all cyber insurance claims yet 40% of business currently lack the coverage needed. Discover how to improve your ransomware prevention strategy to reduce cyber risk and meet insurance requirements.
Training service prepares ransomware response teams for successful threat actor engagement to mitigate damage, protect brand reputation, anticipate emerging threats, and more.
New report provides in-depth look at novel NAS-based threat
Threat analysts have connected the pieces that link the Ransom Cartel RaaS (ransomware-as-a-service) to the REvil gang, one of the most notorious and prolific ransomware groups in recent years. [...]