OK, I resubmitted the file to VirusTotal because the previous scan was a month old:
https://www.virustotal.com/en/file/...5e916d808cef8408a71/analysis/1388791577/Only one antivirus (AntiVir, which is made by Avira) shows a match.
However, lets see what their site says about "TR/Crypt.ZPACK.Gen7":
http://www.avira.com/en/support-threats-description/tid/7414/tlang/enA generic detection routine designed to detect common family characteristics shared in several variants.
This special detection routine was developed in order to detect unknown variants and will be enhanced continuously.
... meaning that this is *NOT* a known virus, it merely has the *POSSIBILITY* of being a virus based on some heuristics. Since this is the only positive match, and there are reports of Avira marking other apps as viruses:
SWTOR TR/Crypt.ZPACK.GENTeam Fortress 2... or Bioshock... or Crysis 2... or just about anything, do a google search for "tr crypt xpack gen steam" and you'll get hundreds of threads about false positives, this is apparently a known issue.