true indian,
Report a few days upon a sample of the actual malware has been sent to virus AT avast dot com.
You should at least extensively check and counter-check and re-check after some time has elapsed.
For instance you report as undetected a downloader that avast has detection for as Win32:Ivelog-D PUP
The malware that is missed could have been found up when run as a riskware toolbar download aka TR/Dldr.Agent.apg.
Now avast team analysts has decided to treat this as a PUP detection.
You miss a detection with URLVoid, but the Networkshield flags it. Avast has protection for it.
You scan a so-called missed detection just before avast detection is being added. Sometimes detection cannot be made
because the malware is no longer active, closed etc., Some malware only survises for a minimal time online (generally 3 1/2 hrs).
As you do not know what the avast detection brew is made up with, do not comment the contents!
here I give you an example for which the greens (active) and reds (closed, taken down) are not showing the real-time situation results:
htxp://www.mwis.ru/ (a lot of greens are actually to be interpreted as reds),
polonus