CISA updated 59 KEV entries in 2025 to specify that the vulnerabilities have been exploited in ransomware attacks. The post Concerns Raised Over CISA’s Silent Ransomware Updates in KEV Catalog appeared first on SecurityWeek .
A new evolution in the ClickFix campaign, dubbed CrashFix, has been identified. This variant deliberately crashes victims' browsers and uses social engineering to lure users into executing malicious commands. The attack begins with a malicious ad redirecting users to install a harmful browser extension impersonating a legitimate ad blocker. The payload causes delayed browser issues and presents a fake security warning. It misuses the Windows utility finger.exe to execute malicious commands and downloads additional payloads, including a Python-based Remote Access Trojan (RAT). The RAT, named ModeloRAT, establishes persistence and performs extensive reconnaissance. The campaign targets domain-joined systems and employs multiple obfuscation techniques to evade detection.
The hacker claims to have stolen nearly 700,000 Substack user records, including email addresses and phone numbers. The post Substack Discloses Security Incident After Hacker Leaks Data appeared first on SecurityWeek .
VS Code-integrated configuration files are automatically executed in Codespaces when the user opens a repository or pull request. The post VS Code Configs Expose GitHub Codespaces to Attacks appeared first on SecurityWeek .
SystemBC is a malware strain that has recently infected over 10,000 devices despite previous law enforcement efforts to dismantle its infrastructure. It is primarily known for deploying ransomware and other malicious payloads, as well as using compromised machines to proxy traffic, which can facilitate further attacks or anonymize threat actor activities. The malware's persistence and ability to evade takedown attempts highlight its resilience and ongoing threat. Although no specific affected software versions or exploits are detailed, the infection scale and functionality suggest a significant risk to organizations. The threat is rated medium severity due to its impact on confidentiality and availability, moderate ease of exploitation, and broad infection scope. European organizations, especially those with extensive networked environments, could face operational disruptions and data breaches. Mitigation requires focused network monitoring, blocking known proxy traffic patterns, and rapid incident response to infected hosts. Countries with high technology adoption and critical infrastructure are more likely targets. Defenders should prioritize detection of SystemBC-related traffic and strengthen endpoint protections to prevent initial infection and lateral movement.
The Cyberspy Group is an advanced persistent threat (APT) actor that has conducted cyber espionage operations targeting governments and critical infrastructure across 37 countries. Although Palo Alto Networks has not officially attributed this group, evidence suggests a likely connection to China. The campaign involves sophisticated intrusion techniques aimed at compromising sensitive governmental and infrastructure systems, potentially leading to significant confidentiality and operational impacts. No specific affected software versions or vulnerabilities have been disclosed, and no known exploits are currently reported in the wild. The threat is assessed as critical due to the broad scope, high-value targets, and potential for severe disruption. European organizations, especially those involved in government and critical infrastructure sectors, face heightened risk. Mitigation requires enhanced network monitoring, threat intelligence sharing, and rigorous access controls tailored to detect and prevent APT intrusions. Countries with significant government and critical infrastructure digital footprints, such as Germany, France, the UK, Italy, and the Netherlands, are most likely to be affected given their strategic importance and historical targeting patterns. The threat's complexity and stealthy nature necessitate proactive defense measures beyond standard patching and antivirus solutions.
For a few days, many phishing emails that landed into my mailbox contain strange URLs. They are classic emails asking you to open a document, verify your pending emails, …
A malicious email attachment containing a . bat script is delivering a multi-stage malware payload designed to steal data via a Chrome injector. The initial script is a fork of publicly available GitHub code but includes obfuscated Base64-encoded payloads executed through PowerShell. The payload fetches additional components from a compromised website, including a . NET program that establishes persistence via scheduled tasks and communicates with a Telegram-based command and control (C2) server. This malware, identified as XWorm V7.x, uses sophisticated obfuscation and evasion techniques to avoid detection. It targets Windows systems and aims to steal sensitive information silently. The attack does not require user interaction beyond opening the malicious attachment and does not currently have known widespread exploitation but poses a medium risk. European organizations using Windows and Chrome browsers are potential targets, especially those with less mature email security controls.
In early February 2026, an intrusion was detected where threat actors exploited compromised SonicWall SSLVPN credentials for initial network access. The attackers deployed an EDR killer utilizing a legitimate but revoked EnCase forensic driver to terminate security processes from kernel mode. This technique, known as Bring Your Own Vulnerable Driver (BYOVD), bypasses Windows Driver Signature Enforcement. The attack was halted before ransomware deployment, but it highlights the growing trend of weaponizing signed, legitimate drivers to disable endpoint security. The intrusion involved aggressive network reconnaissance, deployment of a sophisticated EDR killer with an encoded kernel driver payload, and attempts to establish persistence. The case underscores the importance of multi-factor authentication, VPN log monitoring, and implementing Microsoft's recommended driver block rules.
An AWS environment was targeted in a sophisticated attack, with the threat actor gaining administrative privileges in under 10 minutes. The operation showed signs of leveraging large language models for automation and decision-making. Initial access was obtained through credentials found in public S3 buckets, followed by rapid privilege escalation via Lambda function code injection. The attacker moved laterally across 19 AWS principals, abused Amazon Bedrock for LLMjacking, and launched GPU instances for potential model training. The attack involved extensive reconnaissance, data exfiltration, and attempts to establish persistence. Notable techniques included IP rotation, role chaining, and the use of AI-generated code.
A major cybercriminal operation called Rublevka Team has generated over $10 million through cryptocurrency theft since 2023. The group employs a network of social engineering specialists who direct victims to malicious pages impersonating legitimate crypto services. Using custom JavaScript scripts, they trick users into connecting wallets and authorizing fraudulent transactions. Rublevka Team's infrastructure is fully automated, offering affiliates access to tools for launching high-volume scams. Their model poses a growing threat to cryptocurrency platforms and brands, with potential for reputational and legal risks. The group's agility in rotating domains and targeting lower-cost chains like Solana undermines traditional fraud detection efforts.
While both cyberwar and cyberwarfare will increase through 2026, cyberwarfare is likely to increase more dramatically. We hope it will never boil over – but we should be aware of the possibility and its consequences. The post Cyber Insights 2026: Cyberwar and Rising Nation State Threats appeared first on SecurityWeek .
A massive malware campaign dubbed ClawHavoc has been uncovered in the ClawHub marketplace, targeting OpenClaw bots and their users. An AI bot named Alex, working with security researcher Oren Yomtov, discovered 341 malicious skills, including 335 from a single campaign. The malware, identified as Atomic Stealer (AMOS), uses sophisticated techniques to evade detection and steal sensitive data. The attack exploits users' trust in AI assistants, potentially compromising personal and financial information. In response, a new tool called Clawdex has been developed to help bots and users scan for malicious skills before installation.
Almost 400 fake crypto trading add-ons in the Moltbot/OpenClaw AI assistant project have been discovered, potentially leading users to install information-stealing malware. These add-ons, known as skills, masquerade as cryptocurrency trading automation tools and target various platforms. The malicious skills share the same command-and-control infrastructure and use social engineering to convince users to execute commands that steal crypto assets. The supply chain attack relies on social engineering and lacks security review in the skills publication process. Security experts warn about the inherent risks of endpoint-native AI agents and emphasize the need for proper security controls and architectural design considerations.
Wiz and Permiso have analyzed the AI agent social network and found serious security issues and threats. The post Security Analysis of Moltbook Agent Network: Bot-to-Bot Prompt Injection and Data Leaks appeared first on SecurityWeek .
Last week, a new AI agent framework was introduced to automate "live". It targets office work in particular, focusing on messaging and interacting with systems. The tool has gone viral not so much because of its features, which are similar to those of other agent frameworks, but because of a stream of security oversights in its design.
Rapid7 Labs has uncovered a sophisticated campaign attributed to the Chinese APT group Lotus Blossom, involving a new custom backdoor named Chrysalis. The attack compromised Notepad++ infrastructure to deliver the backdoor. Analysis revealed multiple custom loaders, including one using Microsoft Warbird for obfuscation. The Chrysalis backdoor has extensive capabilities for information gathering, file operations, and remote command execution. Additional artifacts found include Cobalt Strike beacons and Metasploit payloads. The campaign shows Lotus Blossom evolving its tactics, mixing custom and off-the-shelf tools with advanced obfuscation techniques to evade detection.
Infostealer threats are expanding beyond Windows, targeting macOS and leveraging cross-platform languages like Python. Recent campaigns use social engineering to deploy macOS-specific infostealers such as DigitStealer, MacSync, and AMOS. These stealers use fileless execution and native macOS utilities to harvest credentials and sensitive data. Python-based stealers are also on the rise, allowing attackers to quickly adapt and target diverse environments. Additionally, threat actors are abusing trusted platforms like WhatsApp and PDF converter tools to distribute malware such as Eternidade Stealer. These evolving threats blend into legitimate ecosystems and evade conventional defenses, posing significant risks to organizations across various operating systems and delivery channels.
A sophisticated phishing campaign has been detected that utilizes a multi-stage approach to evade detection. The attack begins with a procurement-themed email containing a PDF attachment. This PDF redirects victims to another PDF hosted on trusted cloud storage, which then leads to a fake Dropbox login page. The attackers exploit trusted platforms and harmless file formats to bypass security measures. The campaign uses social engineering tactics to harvest credentials, which are then exfiltrated to attacker-controlled infrastructure via Telegram. This method proves effective by leveraging legitimate business processes, trusted file types, and reputable cloud services to appear authentic and bypass automated security checks.
