A week in security (May 11 – May 17)

Last week on Malwarebytes Labs: Attackers replaced JDownloader installer downloads with malware Meta’s confusing new approach to chat privacy Why Malwarebytes blocks some Yahoo Mail redirects Fake Claude search results lure Mac users into ClickFix attack Deepfake sextortion forces schools to remo...

Pre-Stuxnet Fast16 Malware Tampered with Nuclear Weapons Simulations

A new analysis of the Lua-based fast16 malware has confirmed that it was a cyber sabotage tool designed to tamper with nuclear weapons testing simulations. According to Broadcom-owned Symantec and Carbon Black teams, the pre-Stuxnet tool was engineered to corrupt uranium-compression simulations...

Learning to Look Benign: Targeted Evasion of Malware Detectors Via API Import Injection

Machine learning-based malware detectors are widely deployed in antivirus and endpoint detection systems, yet their reliance on static features makes them vulnerable to adversarial manipulation. This paper investigates whether a malware sample can be intentionally misclassified as a specific beni...

Malicious Package

Overview color-style-utils is a malicious package. This package contains malicious code that includes infostealer malware, one of which is a Shai-Hulud clone following the TeamPCP open source release, and one DDoS botnet package. While this package might be attempting to impersonate a valid...

Malicious Package

Overview axois-utils is a malicious package. This package contains malicious code that includes infostealer malware, one of which is a Shai-Hulud clone following the TeamPCP open source release, and one DDoS botnet package. While this package might be attempting to impersonate a valid organizatio...

Malicious Package

Overview @deadcode09284814/axios-util is a malicious package. This package contains malicious code that includes infostealer malware, one of which is a Shai-Hulud clone following the TeamPCP open source release, and one DDoS botnet package. While this package might be attempting to impersonate a...

Malicious Package

Overview chalk-tempalte is a malicious package. This package contains malicious code that includes infostealer malware, one of which is a Shai-Hulud clone following the TeamPCP open source release, and one DDoS botnet package. While this package might be attempting to impersonate a valid...

CVE-2021-47977 WordPress Anti-Malware Security Bruteforce Firewall <= 4.20.72 Directory Traversal

WordPress Plugin Anti-Malware Security and Bruteforce Firewall 4.20.59 contains a directory traversal vulnerability that allows unauthenticated attackers to read arbitrary files by manipulating the file parameter. Attackers can send requests to the duplicatordownload action via admin-ajax.php wit...

CVE-2021-47977

CVE-2021-47977 affects the WordPress plugin Anti-Malware Security and Bruteforce Firewall 4.20.59. It describes a directory traversal vulnerability where unauthenticated attackers can read arbitrary files by manipulating the file parameter via the duplicator_download action in admin-ajax.php, usi...

EUVD-2021-34837

WordPress Plugin Anti-Malware Security and Bruteforce Firewall 4.20.59 contains a directory traversal vulnerability that allows unauthenticated attackers to read arbitrary files by manipulating the file parameter. Attackers can send requests to the duplicatordownload action via admin-ajax.php wit...

CVE-2021-47977

WordPress Plugin Anti-Malware Security and Bruteforce Firewall 4.20.59 contains a directory traversal vulnerability that allows unauthenticated attackers to read arbitrary files by manipulating the file parameter. Attackers can send requests to the duplicatordownload action via admin-ajax.php wit...

PT-2026-41463

Name of the Vulnerable Software and Affected Versions Anti-Malware Security and Bruteforce Firewall version 4.20.59 Description A directory traversal issue allows unauthenticated attackers to read arbitrary files by manipulating the file parameter. Attackers can send requests to the 'duplicator...

Attackers replaced JDownloader installer downloads with malware

If you downloaded the JDownloader installer during the compromise window May 6-7, you are advised to verify the file. JDownloader is a popular download management application, particularly favored for automated downloads from file-hosting services, video sites, and premium link generators. The...

MAL-2026-3794 Malicious code in dowload_ebok_also_an_octopus_by_maggie_tokuda_hall_ah2ip (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector c8458191c9d9b588edbefd52034669969e6511810e2ebe6e187a48e4405673f1 The package dowloadebokalsoanoctopusbymaggietokudahallah2ip was found to contain malicious code. Source: ghsa-malware...

MAL-2026-3801 Malicious code in the_secret_of_running_by_hans_van_dijk_ron_van_megen_02jsk (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector 11aa0239d26b0aae85ed4e3f9bc78838fbdfd47beb4bc9ab701687cb7081513e The package thesecretofrunningbyhansvandijkronvanmegen02jsk was found to contain malicious code. Source: ghsa-malware...

Malicious code in marathon-assets (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector 1cdc9efb8f4187062e02260f2126eda85583ad4d7e274c7f3c5d72b900e3eff3 The package marathon-assets was found to contain malicious code. Source: ghsa-malware 79835a80726adeabd12385031ae8c8a34d577b780fce22a9eb86304161ab2aa...

MAL-2026-3793 Malicious code in simple-date-diff-utils (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector 9fb5f213f91d456c5ac949bf0995ee5310b944a9bf102b429edec11a99cfb6bf The package simple-date-diff-utils was found to contain malicious code. Source: ghsa-malware...

Malicious Package

Overview agents-a365-runtime is a malicious package. This package contains malicious code, and its content was removed from the official package manager. While this package might be attempting to impersonate a valid organization, there is no connection between that organization and this package...

Disc Soft DAEMON Tools Lite 安全漏洞

Disc Soft DAEMON Tools Lite is a software developed by Disc Soft that supports the mounting of disc images and the creation of virtual drives along with image file management. Versions 12.5.0.2421 to 12.5.0.2434 of Disc Soft DAEMON Tools Lite contain security vulnerabilities. These vulnerabilitie...

MalwarePT: A Binary-Level Foundation Model for Malware Analysis

Automated malware analysis increasingly relies on machine learning, yet most existing methods remain task-specific and depend on handcrafted features or narrowly scoped models. Recent developments in binary-level foundation models suggest a path toward reusable program representations, but their...