Rule to catch odd href tag

[Alton Danks]

Hello,

I'm seeing some SPAM that has odd href tags like the following:

align="center"><a hrefShanghaishref=http://cowerers.com href=

"http://www.nungim.com/?ai=7030 ">
<img border="0" src=

"http://www.olivegrovetree.com/0/11/11-2.jpg"; </a></p>

I'm not sure what the spammer gains by the odd href tag, but I would like to
create a rule to catch it when it is used.

I've tried:

rawbody CTS_HREF /\bhref[a-z]\b/i

rawbody CTS_HREF /\Whref[a-z]\W/i

and the same with body instead of rawbody - 

with no results.

Ideally the rule would look for href followed by anything other than = or
space.

Al