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Topic 6.4 of Examining Self-Defending Malware
Multi-byte and rolling XOR, encrypted configuration blocks in Cobalt Strike and Emotet, per-string encryption with zeroing, FLOSS runtime string recovery, and a five-step data extraction workflow.
By the end of this topic, you will
Quadrant 1 · e-Tutorial
Quadrant 2 · e-Content
Quadrant 3 · Web Resources
Downloadable reference material
External links
CobaltStrikeParser — Beacon Config Extractor
Python tool that automatically extracts Cobalt Strike beacon configuration including C2 addresses, sleep timers, and user-agent strings.
FLOSS — FLARE Obfuscated String Solver
Mandiant tool for recovering stack strings and XOR-decoded strings without executing the binary.
REMA eBook 2026 — Chapter 6, Embedded Data Protection
Full rolling XOR diagram and config extraction workflow in the REMA eBook Chapter 6.
Quadrant 4 · Self-Assessment
Examining Self-Defending Malware
Covers anti-debugging techniques, virtual machine and sandbox detection, protection of embedded data, code misdirection, and advanced unpacking methodologies.
REMA Complete Assessment
A comprehensive 120-question assessment covering the entire Reverse Engineering and Malware Analysis curriculum: malware taxonomy and reverse engineering fundamentals, static and dynamic analysis, reversing malicious code, malicious web and document files, in-depth analysis of packed and fileless malware, and self-defending malware techniques.
