[REVS] An Overview of UNIX Rootkits
From: support@securiteam.com
Date: 03/19/03
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From: support@securiteam.com To: list@securiteam.com Date: 19 Mar 2003 13:58:06 +0200
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An Overview of UNIX Rootkits
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SUMMARY
Rootkits, as we know them now, came into being sometime in the mid 1990s.
At that time, Sun operating system UNIX system administrators started
seeing strange server behavior, missing disk space, CPU cycles and network
connections that strangely did not show up in command netstat. By
implementation technology, three main classes of Rootkits are available
today: binary kits, kernel kits and library kits. The first class achieves
its goal by replacing certain system files with their Trojan counterparts.
The second uses kernel components (also called modules) or Trojans, and
the third employs system library Trojans. Rootkits found in the wild (such
as captured on Honeypots), often combine Trojaned binaries with higher
"security" provided by the kernel and library components.
DETAILS
The following linked paper will give an overview of the Rootkits
functionality, the different types of Rootkits, and some case studies of
captured Rootkits.
ADDITIONAL INFORMATION
The paper is available for download at:
<http://www.idefense.com/idpapers/Rootkits.pdf>
http://www.idefense.com/idpapers/Rootkits.pdf.
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