Staog was the first computer virus written for the Linux operating system. It was discovered in the fall of 1996, and the vulnerabilities that it exploited were fixed soon after. It has not been detected in the wild since its initial outbreak.
Staog was able to infect Linux despite its security-oriented design which requires users and programs to login as root before any drastic operations can be taken. It worked by exploiting some kernel vulnerabilities to stay resident. Then, it would infect executed binaries.
Since it relied on fundamental bugs, software upgrades made systems immune to Staog. This, combined with its shot in the dark method of transmitting itself, ensured that it died off rather quickly.
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