You personally, no, these DCOM attacks are random in nature as they use a random IP address generator in the hope of a couple of things:
1. you don't have an effective firewall.
2. your OS is vulnerable to attack, e.g. not fully up to date.
So what is your firewall as that should really be your first line of defence ?
Your ISP when you first connect assigns a dynamic IP address, this should change each time you first connect (broadband) or every time you connect (dial-up). So hopefully you can see it is not a targeted attack, but a speculative one. It is possible that someone who also uses that ISP has an infected system and that makes it a little easier to generate IP addresses for other ISP users.