Reversing Data Structures and Algorithms in Malware
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Reversing Data Structures and Algorithms in Malware

About the Book

Walk through a number of real world examples for reverse engineering data structures and algorithms found in malware in order to gradually introduce the reader to more advanced examples culminating in reverse engineering a C2 (Command and Control) protocol.

About the Author

Jason Reaves
Jason Reaves

Jason Reaves is a Principal Threat Researcher who specializes in malware reverse-engineering. He has spent the majority of his career tracking threats in the Crimeware domain, including reverse-engineering data structures and algorithms found in malware in order to create automated frameworks for harvesting configuration and botnet data. Previously, he worked as a software developer and unix administrator in the financial industry and also spent six years in the U.S. Army. Jason holds multiple certifications related to reverse-engineering and application exploitation and has published numerous papers on topics such as writing malware scripts pretending to be a bot, unpackers, configuration data harvesters and covert channel utilities. He enjoys long walks in IDA and staring at RFCs for hours.

Table of Contents

  • Introduction
  • Identifying Structure
  • Making sense of Data
    • Locky Config
    • No Nothing Example
  • Approaches to reversing algorithms
    • Simple data searching – Locky config
    • Decode the data - Locky config cont
    • Data that shrinks or expands - Locky config cont
    • Customized Encryption – Shifu Custom RC4
  • Reversing Malware C2 Command Structure
  • Appendix A
    • Kovter Config Parser
    • Zeus Binstruct Parser
    • Visual encrypt
    • Zloader C2 Data Pull Script

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