NEW350+ rooms now have a live terminal, so you can learn by typing the commands, right in your browser.Learn in a live terminal. 350+ rooms.Try a lab♥ Codelivly is 100% free, no paywall. If it helped you, chip in to keep it running.100% free. Help keep it so.Support us
[>_] ROOM · Malware Analysis
Control Flow and Algorithm Recognition
Master advanced reverse engineering by reconstructing complex control flow graphs and identifying cryptographic, hashing, and compression algorithms in compiled binaries.
Room tasks
1What Is Control Flow Analysis and Why Does It Matter
2Recognizing Common Algorithms (XOR Loops, Base64, Custom Encoding)
3Guided Lab: Reverse-Engineering a Custom String Decoding Routine
Frequently Asked Questions
What is a control flow graph?
A control flow graph maps a function's basic blocks and the jumps between them. Reverse engineers use it to follow execution paths, spot loops and understand logic without reading every instruction.
How do you recognise a cryptographic algorithm in a binary?
Look for known constants, S-boxes, characteristic loop structures and rotation or XOR patterns. Matching those signatures lets you name algorithms such as RC4, AES or CRC without source code.
Why does algorithm recognition help malware analysis?
Identifying the encryption or hashing routine shows how strings, configs and traffic are protected, so you can decrypt them. This advanced Codelivly room is free and hands-on.