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Imagine a hacker who not only exploited zero-days to breach over 600 organizations but also played the hero by patching vulnerabilities for Microsoft. How does one person walk the line between cybercrime and cybersecurity?

thedefendopsdiaries.com/decryp

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The DefendOps Diaries · Decrypting EncryptHub: A Cybersecurity EnigmaVon Alex Cipher

(trendmicro.com) A Deep Dive into Water Gamayun's Arsenal and Infrastructure trendmicro.com/en_us/research/

Executive Summary:
This research provides a comprehensive analysis of Water Gamayun (also known as EncryptHub and Larva-208), a suspected Russian threat actor exploiting the MSC EvilTwin zero-day vulnerability (CVE-2025-26633) in Microsoft Management Console. The threat actor employs sophisticated delivery methods including malicious provisioning packages, signed MSI files, and Windows MSC files to deploy multiple custom payloads. Their arsenal includes custom backdoors (SilentPrism and DarkWisp), multiple variants of the EncryptHub Stealer, and known malware like Stealc and Rhadamanthys. The research details the C&C infrastructure, data exfiltration techniques, and persistence mechanisms used by the group. Trend Micro researchers gained access to the C&C server components, enabling them to analyze the architecture, functionality, and evasion techniques employed by the threat actor.

Trend Micro · A Deep Dive into Water Gamayun's Arsenal and InfrastructureTrend Research discusses the delivery methods, custom payloads, and techniques used by Water Gamayun, the suspected Russian threat actor abusing a zero-day vulnerability in the Microsoft Management Console framework (CVE-2025-26633) to execute malicious code on infected machines.