After a short hiatus, the “Ryuk” ransomware variant is back with upgrades, including the ability to fully encrypt data in just five hours. A victim would need to respond to such an attack within one hour to stop it, according to security researchers. Ryuk’s operators have been exploiting the recently identified Zerologon vulnerability, which has enabled privilege escalation and access to a domain controller without the attackers having to target a high-privilege user in their initial phishing email. Previously, Ryuk was thought to have been replaced by the “Conti” ransomware variant, but instead the souped-up Ryuk will almost certainly prevail as a threat into the mid-term future (between three months and one year).
The developers of the infamous “Maze” ransomware claimed to have permanently ceased operations.
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Security researchers discovered two unrelated cyber-threat campaigns targeting Microsoft SharePoint.
The FBI made digital copies of malicious web-shells before removing them from hundreds of vulnerable servers in the US, without any warning to affected organizations.
A cyber-espionage campaign was found targeting the Vietnamese military and government, as well as other sectors and some entities in Thailand and Central Asia.
A user of the cybercriminal forum RaidForums has offered 533 million records of Facebook user data for only a few US dollars.
Insurance provider CNA Financial has announced it was targeted in a cyber attack, later confirmed as involving the newly identified “Phoenix Cryptolocker” ransomware.
The new Internet of Things (IoT) botnet ZHtrap has been turning devices it has infected into honeypots, in a novel technique that highlights yet another risk presented by exposed IoT devices.
Four zero-day vulnerabilities in Microsoft Exchange Servers have been linked to more than 30,000 cyber attacks taking place in the week following their discovery.
A new round of software attacks has raised another red flag concerning supply-chain security and the prevalence of third-party supply-chain targeting.
The French National Cybersecurity Agency (ANSSI) identified a new “Ryuk” ransomware variant that has the capability to self-propagate across victim networks.
The People’s Republic of China-linked advanced persistent threat group “APT31” reportedly cloned and deployed a zero-day exploit developed by NSA's Equation Group in 2013.
An unidentified attacker accessed the computer systems of a water treatment facility in the US, altering sodium hydroxide levels in the potable water supply.
Following the disclosure of the SolarWinds supply-chain compromise in December 2020, details continue to emerge about the scale of the attack.
The North Korean advanced persistent threat (APT) group “ZINC” has been targeting cyber-security professionals with social engineering that leads to malware delivery.
A new web portal is aiding cyber-threat incident responders by detailing vulnerabilities in popular malware.
Technical analysis of a cyber-threat campaign using the dangerous and widespread “Lokibot” malware has revealed an updated method being used to conduct sophisticated attacks.
A cyber-security firm released a free decryptor for the popular and sophisticated “DarkSide” ransomware.
The cyber-security industry learned some valuable lessons during the unique and unprecedented year of 2020.
The notorious Automated Vending Cart (AVC) website Joker’s Stash allegedly displayed a notification that the site was seized by law-enforcement agencies.
SolarWinds confirmed that its network management system, Orion Platform, was exploited to conduct a highly sophisticated, manual supply-chain attack.