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This backdoor was found in some infeted machines. Its a very simple one, and is very easy to detect. It Opens a password protected backdoor and lets you execute commands (using a shell, /bin/sh). When the backdoor starts, it hides itself in the background as a bash shell (-bash 0n).
The default password is "app910h" and the welcome msg (in the backdoor) is "unlg's backd00r, enter whatever is necessary".