Strange new spam

There's a new spam going round that we started seeing last Friday.  The subject line consists of a (seemingly) random string of characters composed of uppercase letters and numbers, and the body text contains two words: Hillo<number> followed by a string of numbers and lowercase letters (letters optional in the limited examples I've seen).


Example

From: eldonxv4 [eldonxv4@hotmail.com]
To: A name that's not mine
Subject: G0XVB

Hillo7 761


Looks a little random but my bet is that it is either broken spamware or address harvesting.  I think we can expect to see another spam run within the next couple of days.  That's typically the way it worked in the past.