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Cheese Worm Closes Back Doors Left By 1i0n Malware on Linux Servers

May 17, 2001 •

Anthony Pell

1 min read

Topics Covered

cyber defense server protection linux security self-spreading patch malware remediation

Dubbed the Cheese worm, the program is basically a self-spreading patch. It enters servers that have already have been compromised by a previous bit of malicious code--the 3-month-old 1i0n worm--and closes the back door behind it, adding security to . . . Dubbed the Cheese worm, the program is basically a self-spreading patch. It enters servers that have already have been compromised by a previous bit of malicious code--the 3-month-old 1i0n worm--and closes the back door behind it, adding security to the system. "In some cases, yes, it will remove the back door," said Kevin Houle, leader of the artifact analysis team at the Computer Emergency Response Team (CERT) Coordination Center at Carnegie Mellon University. "Yet many Linux systems use different (Internet) files. The worm's commands will fail on those types of systems.

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