I've had the file "WPA_Kill.exe" (version 1.6.2) on my computer for a couple of years. It never triggered an antivirus alert. Recently, it tripped my Avast antivirus, which identified it as the "Win32:Small-XC" trojan. I think this must be a false positive.
I submitted this file to the on-line scanner at Kaspersky Labs, and it came up clean.
What do you think? Trojan? How likely is it that it would go undetected for two years and dozens of antivirus and malware scans, and now suddenly be identified by Avast as a trojan?