Reverse Engineering and Malware Analysis
Reverse Engineering and Malware Analysis
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Topic 5.5 of In-Depth Malware Analysis
XOR encoding patterns, single-byte and multi-byte key extraction, standard algorithm identification via constants, FindCrypt2 and signsrch usage, custom Base64 alphabets, and a six-step decryption workflow.
By the end of this topic, you will
Quadrant 1 · e-Tutorial
EZ Bytes · quick recaps
Your AV Saw Clean. The S-Box at 0x63 0x7C Said AES. | Cryptographic Identification
89s
Quadrant 2 · e-Content
Quadrant 3 · Web Resources
Downloadable reference material
External links
FindCrypt2 — IDA Pro Crypto Constant Scanner
IDA Pro plugin that scans for cryptographic constants and annotates matches. Install in IDA plugins directory.
CyberChef — From Base64 with Custom Alphabet
Use the From Base64 operation with a custom alphabet field. Paste the 64-character alphabet found in the binary to decode non-standard encodings.
Quadrant 4 · Self-Assessment
In-Depth Malware Analysis
Covers packed malware, manual unpacking, obfuscated PowerShell, fileless malware, code injection, API hooking, memory forensics with Volatility, sandbox analysis, and network signatures.
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.
Quadrant 5 · Play
Ungraded practice for Cryptographic Identification: games and hands-on Skill Labs that use this topic, plus the crossword for In-Depth Malware Analysis. It never affects your unit assessment, and clearing a game or lab for the first time earns EZ Board points when you are signed in.
Crossword
In-Depth Malware Analysis
9 key terms from this unit. Free to play.
Race
Unpack Underpass
6 checkpoints from this unit. Free to play. Earn 30 EZ Board points on your first clear.
Discussion · 0 comments
This is the discussion thread for the lesson "Cryptographic Identification" (Reverse Engineering and Malware Analysis, Unit 5). Ask questions, share real-world examples, and help classmates who are stuck. Conversation starters. Try explaining one of these in your own words: - Write a Python one-liner to decrypt a single-byte XOR encoded buffer - Write a Python snippet to decrypt a multi-byte rolling XOR encoded buffer - Identify five cryptographic algorithms by their characteristic constants
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Open in forumREMA eBook 2026 — Chapter 5, Cryptographic Identification
Full cryptographic constant reference table and XOR decryption examples in the REMA eBook Chapter 5.