Breplibot.C is a backdoor with bot capabilities. It connects to several
IRC servers and waits for commands from the backdoor author. The
backdoor tries to utilize Sony DRM software for hiding its process,
file and registry keys. More information about Sony DRM can be found here:
The backdoor's file is a PE executable about 10 kilobytes long,
packed with UPX file compressor.
When the backdoor's file is started, it copies itself as
'$sys$xp.exe' file to Windows System folder and then tries to create
the following startup key values in the Registry:
The string '$sys' is used for hiding the backdoor using Sony's XCP DRM
software. This is successful only if the DRM is installed after the backdoor.
If the DRM is already installed, the backdoor fails to install itself on
system.
The backdoor creates mutex '$sys$xp.exe' for making sure only one copy
of the backdoor runs at the same time. It might also create a mutex named
'Super'.
Bot functionality
When the backdoor is active, it connects to an IRC server, joins a certain
channel and acts as a bot there.
The following IRC servers and ports are used by the backdoor:
