Incident Response Tools For Unix, Part One: System Tools

    Date28 Mar 2003
    2908
    Posted ByAnthony Pell
    This article is the first in a three-part series on tools that are useful during incident response and investigation after a compromise has occurred on a OpenBSD, Linux, or Solaris system. This installment will focus on system tools, the second part . . . This article is the first in a three-part series on tools that are useful during incident response and investigation after a compromise has occurred on a OpenBSD, Linux, or Solaris system. This installment will focus on system tools, the second part will discuss file-system tools, and the concluding article will look at network tools. The information used in these articles is based on OpenBSD 3.2, Debian GNU/Linux 3.0 (woody), Red Hat 8.0 (psyche), and Solaris 9 (aka Solaris 2.9 or SunOS 5.9).

    The best tools that can be utilized in response to the intrusion threat are not ones that will be discussed in detail in this series. The tools that will be covered are discussed in the context of triage after an intrusion has happened. Intrusions are generally preventable. Using techniques such as keeping systems up-to-date by patching vulnerabilities, configuring a system with the minimum required services, using operating systems that are designed with security in mind, and using kernel patches that harden the system go a long way toward making sure you never have to use the tools discussed in this series.

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