Devnull
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Devnull is the name of a computer worm for the Linux operating system which has been named after /dev/null, Unix's null device. This worm was found on Monday the 30th of September 2002.
This worm, once the host has been compromised, downloads and executes a shell script from a web server. This script downloads an gzipped executable file named k.gz from the same address, it then decompresses and runs the file.
This downloaded file appears to be an IRC client, it connects to different channels and waits for commands to process on the infected host.
Then the worm checks for presence of the gcc compiler on the local system and if found it creates a directory called .socket2 Next it downloads a compressed file called "devnull.tgz ". After decompressing two files are created: an ELF binary file called "devnull" and a source script file called "sslx.c" The sslx.c file gets compiled into an ElF binary "sslx".
The executable will scan for vulnerable hosts and it will use the compiled program to exploit the the known OpenSSL vunerability.
See also: List of Linux computer viruses
External links
- F-Secures Website: Linux/Devnull (http://www.f-secure.com/v-descs/devnull.shtml)