Is there anyone from Versaweb on the list, or anyone in the NOC at all?
Firstly, both the contact addresses you have listed in WHOIS (ipadmin@
and abuse-reports@) are bouncing emails - no such user.
More urgently, while trialling a new SIEM tool I've identified
literally thousands of unique IPs spread across at least nine separate
ARIN PI allocations scanning for MS DS / TCP:445 going back several
months. 22.214.171.124/24 would be a good place to start looking for
the common link - I've logged over 150 unique IPs in that block alone,
but the rest are not much better.
I hate to think what else might have slipped through the net - inbound