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: The executed code fetches an architecture-specific loader that retrieves the VShell backdoor . This malware runs entirely in memory, masquerading as a kernel worker thread to avoid detection by standard antivirus tools that only scan disk files. Analysis & Write-up Summary

: Delivered typically via phishing emails as a seemingly benign .rar attachment. Fimbul.rar

This malware targets Linux systems, specifically exploiting how shell scripts or administrative utilities might handle filenames when expanding them in loops. : The executed code fetches an architecture-specific loader