Incident Response & Computer Forensics, 2nd Ed., 2nd Edition

CHAPTER 8

Collecting Network-based Evidence

 

You think that your organization’s system has been attacked, or maybe an insider is emailing your organization’s trade secrets to a friend at a rival corporation. What should you do? The single most helpful network-based incident response activity is to deploy computer systems that do nothing but intercept or collect network communications. Capturing network communications is a critical and necessary step when investigating alleged crimes or abuses.

In this chapter, we will demonstrate how to capture network traffic the ugly and bare-metal way, with software such as tcpdump and WinDump. We will discuss how to assemble a robust, secure, network-monitoring system and conduct full-content monitoring ...