From: Logistics Express [firstname.lastname@example.org]
Subject: Re: Changelog 2011 update
as promised changelog,
VirusTotal detects the payload as Cridex. The malware is resistant to automated analysis tools, but Comodo CAMAS reports the creation of a file C:\Documents and Settings\User\Application Data\KB00085031.exe which is pretty distinctive.
If your email filter supports it, I strongly recommend that you configure it to block EXE-in-ZIP files as they are malicious in the vast majority of cases.