VShell and SparkRAT Observed in Exploitation of BeyondTrust Critical Vulnerability (CVE-2026-1731)

Executive Summary On Feb. 6, 2026, BeyondTrust released a security advisory regarding CVE-2026-1731. BeyondTrust is an identity and access management platform. This specific vulnerability involves a pre-authentication remote code execution (RCE) issue within BeyondTrust remote support software. It could allow attackers to execute operating system commands in the context of the site user, which may lead to system…

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Threat Actors Leverage Brand Impersonation for Rewards Fraud, Credential Harvesting Campaigns, and Online Gambling Platforms

Summary Threat actors increasingly leverage airline brand impersonation to facilitate sophisticated reward fraud and illicit online gambling schemes, according to a report published by Help Net Security. Analysis of over 11,000 domains reveals a high-volume ecosystem where keywords such as “rewards” and “points” serve as primary lures for loyalty credential harvesting. Additionally, malicious operators exploit airline…

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Phishing on the Edge of the Web and Mobile Using QR Codes

Executive Summary With QR codes having a notable presence in our everyday lives, some people instinctively scan them without hesitation. But QR codes are also a vector for attack. QR codes enable attackers to bypass organizational security by exploiting the weaker controls of personal mobile devices. By doing this, they can trick users into scanning…

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Malwarebytes Confirms Avast Impersonation Refund Scam Targeting European Users

Summary A fraudulent website impersonating Avast’s visual identity targets French-speaking users by claiming a non-existent €499.99 charge requires a refund, according to a new report by Malwarebytes Labs. The operation utilizes a sophisticated blend of urgency, real-time live chat support via Tawk[.]to, and dynamic page elements to harvest full credit card details and personal information. Technical…

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A Peek Into Muddled Libra’s Operational Playbook

Executive Summary During a September 2025 incident response investigation, Unit 42 discovered a rogue virtual machine (VM) which we believe with high confidence to be used by the cybercrime group Muddled Libra (aka Scattered Spider, UNC3944). The contents of this rogue VM and activity from the attack provide valuable insight into the operational playbook of…

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