It's not an issue anymore. Even a patched Windows 2000 or Windows XP would not be attacked by it.
MS-Blaster exploited a buffer overflow on DCOM-RPC, and the fix was provided a month before MS-Blaster hit. So even when it was active, computers that were fully patched were not affected.
If you run it now, it would send a crafted message to your system (and every system reachable by it) but unless you have an ancient and not patched Windows running, nobody will get affected.
It could send data to internet computers too, but I doubt it would find any vulnerable Windows 2002000 or XP active and online either.