The filename is 700_DDI_CB.exe (DDI = Dungeons & Dragons Insider) It is detected as Packer.ModifiedUPX. No password on the .zip, wasn't sure if necessary. Logfile (mbam /developer) is attached as well. I believe this is a false positive, it is an (admittedly, old) installer for Dungeons & Dragons Insider and I'm certain the file was downloaded from the Wizards of the Coast website. It started detecting after I updated my definitions yesterday. I haven't had a chance to update them today (no regular net access at home, burned disc before leaving for work; doing this at library) to see if it is still detected. I used some online scanners, results: VirusTotal: 3/43 Jotti Malware Scan: 0/20 VirScan: 0/43 Can any someone confirm for me please so I can stop worrying? 700_DDI_CB.zip mbam-log-2012-02-19 (16-00-35).txt