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Threat Intelligence Report

Dissecting a PHP web server rootkit

๐Ÿ“… September 7, 2026 ๐Ÿ“ฐ www.sophos.com ๐Ÿ” 1 CVE(s) referenced

A highly sophisticated Linux rootkit targets BIG-IP APM environments by injecting a fileless PHP web shell directly into memory, evading traditional detection methods and enabling persistent, covert access through both HTTP and local UNIX socket backdoors.

vendor
CVE-2025-53521

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๐Ÿ“Š Visual Mindmap
๐ŸŽฏ IOC Extraction
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๐Ÿ“ฆ STIX 2.1 Bundle