Written in C++ and Python, the malware exfiltrates system information, browser data, and steals files. The post ‘Arkanix Stealer’ Malware Disappears Shortly After Debut appeared first on SecurityWeek .
The malicious code propagates like a worm, poisons AI assistants, exfiltrates secrets, and contains a destructive dead switch. The post New ‘Sandworm_Mode’ Supply Chain Attack Hits NPM appeared first on SecurityWeek .
North Korean state-backed attackers are utilizing Medusa ransomware in their ongoing extortion attacks against the U.S.healthcare sector. The Symantec and Carbon Black Threat Hunter Team discovered evidence of North Korean actors employing Medusa in an attack on a Middle Eastern target and an unsuccessful attempt on a U.S.healthcare organization. Medusa, launched in 2023, operates as a ransomware-as-a-service. The Lazarus sub-group Stonefly has been a key player in North Korean ransomware attacks, using proceeds to fund espionage activities. Despite indictments and rewards, the attacks continue unabated. The current campaign employs various tools, including Comebacker, Blindingcan, ChromeStealer, and RP_Proxy. While the attacks bear similarities to previous Stonefly operations, the exact sub-group responsible remains unclear.
Attackers can inject malicious instructions in a GitHub Issue that are automatically processed by Copilot when launching a Codespace from that issue. The post GitHub Issues Abused in Copilot Attack Leading to Repository Takeover appeared first on SecurityWeek .
The group’s administrator and moderator were arrested last year, and two other members were arrested this month. The post Anonymous Fénix Members Arrested in Spain appeared first on SecurityWeek .
A NuGet supply chain attack involving four malicious packages targeting ASP.NET web application developers has been discovered. The campaign deploys a multi-stage payload where NCryptYo acts as a dropper, establishing a local proxy, while companion packages exfiltrate ASP.NET Identity data and accept threat actor-controlled authorization rules, creating backdoors in victim applications. The packages, published between August 12-21, 2024, have accumulated over 4,500 downloads. The attack uses obfuscation, JIT compiler manipulation, and a two-stage architecture to evade detection. The campaign's objective is to compromise applications during development, gaining access to deployed production instances by controlling the authorization layer.
This entry reports a Maltrail Indicator of Compromise (IOC) dated 2026-02-24, classified as malware with medium severity. It is an OSINT observation from the CIRCL OSINT Feed, indicating suspicious network activity. No specific affected versions, exploits in the wild, or patch information are provided. The threat is categorized as medium risk based on available data.
The KRVTZ-NET IDS alert dated February 24, 2026, reports a low-severity reconnaissance event involving access to PHP info pages on web servers from IP address 20.194.25.241. PHP info pages disclose detailed server configuration and environment information that could aid attackers in identifying vulnerabilities. No active exploitation or payload delivery is indicated, and no known exploits or ransomware campaigns are associated with this activity. The alert is sourced from the CIRCL OSINT feed and is based on automated detection without human validation. While the immediate impact is minimal, such reconnaissance can precede more targeted attacks if leveraged by adversaries. The alert highlights the importance of securing web server configurations by disabling or restricting access to phpinfo pages and monitoring for suspicious access attempts. No patches or direct fixes are applicable since this is an observational detection of reconnaissance activity.
A new campaign exploits OpenClaw skills to distribute the Atomic MacOS Stealer (AMOS). This evolution in supply chain attacks manipulates AI agentic workflows to install malware. The campaign spans multiple repositories with hundreds of malicious skills uploaded to ClawHub and SkillsMP. The infection chain begins with a seemingly harmless SKILL.md file that installs a prerequisite, leading to the download of a Mach-O universal binary. This AMOS variant steals extensive data, including credentials, browser data, cryptocurrency wallets, and various user documents. It lacks system persistence but expands its reach by exfiltrating Apple and KeePass keychains. The malware uses sophisticated encryption schemes and targets multiple browsers and cryptocurrency wallets.
The Everest ransomware group has taken credit for a hacker attack on Vikor Scientific, now called Vanta Diagnostics. The post US Healthcare Diagnostic Firm Says 140,000 Affected by Data Breach appeared first on SecurityWeek .
In his last two diaries, Xavier discussed recent malware campaigns that download JPEG files with embedded malicious payload[1,2]. At that point in time, I've not come across the malicious “MSI image” myself, but while I was going over malware samples that were caught by one of my customer's e-mail proxies during last week, I found another campaign in which the same technique was used.
Oleksandr Didenko sold the stolen identities of US citizens, allowing North Koreans to get hired using freelance work platforms. The post Ukrainian Gets 5 Years in US Prison for Aiding North Korean IT Fraud appeared first on SecurityWeek .
While this campaign targets crypto wallets and steals money, the methodology has far wider potential that could be used by other attackers. The post Autonomous AI Agents Provide New Class of Supply Chain Attack appeared first on SecurityWeek .
Threat actors relying on AI have been exploiting exposed ports and weak credentials to take over FortiGate devices. The post Hundreds of FortiGate Firewalls Hacked in AI-Powered Attacks: AWS appeared first on SecurityWeek .
An active supply chain worm campaign, dubbed SANDWORM_MODE, is spreading through typosquatting and AI toolchain poisoning across at least 19 malicious npm packages. The worm exhibits Shai-Hulud characteristics, incorporating GitHub API exfiltration with DNS fallback, hook-based persistence, SSH propagation, and MCP server injection targeting AI coding assistants. It harvests credentials from developer and CI environments, exfiltrates data via multiple channels, and uses stolen identities to propagate. The campaign also includes a weaponized GitHub Action for CI secret harvesting. The worm employs a multi-stage design with obfuscated loaders, time-gated execution, and extensive configuration options. It targets high-traffic developer utilities, crypto tooling, and AI coding tools, posing a significant threat to the software supply chain.
This report analyzes the recent activities of the MuddyWater APT group, which primarily targets organizations in the Middle East. The group employs sophisticated spear-phishing techniques, often impersonating legitimate entities and using malicious documents to gain initial access. Their attacks focus on long-term infiltration and intelligence gathering rather than immediate disruption. The report details several attack cases from 2019 to 2026, highlighting the group's evolving tactics, including the abuse of legitimate remote management tools and the use of Rust-based malware. The analysis emphasizes the importance of endpoint detection and response (EDR) solutions in identifying and mitigating these threats, as traditional perimeter-based security measures prove insufficient against such advanced persistent threats.
PayPal blamed an application error for the exposure of customer personal information for nearly 6 months. The post PayPal Data Breach Led to Fraudulent Transactions appeared first on SecurityWeek .
For the latest discoveries in cyber research for the week of 23rd February, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES France’s Ministry of Economy has disclosed a data breach resulted from an unauthorized access to the national bank account registry FICOBA, impacting information tied to 1.2 million accounts. Exposed data includes names, […] The post 23rd February – Threat Intelligence Report appeared first on Check Point Research .
