Molte funzioni AV allo stesso modo, ma potrebbero avere diversi meccanismi di azione specifici . In generale funzionano così:
When MBAM removes an item such as a file or a Registry entry and
"quarantines" the item, it is removed from its original location and
stored in a protected container. Both the removed item and it location
are stored in the container in a way that the file is rendered inert
and the location of where it was removed from is also restored. Thus
if it is deemed to be a False Positive declaration, the item removed
(file or Registry entry) can be restored to its original and working
state. If however the item(s) are deemed to be justly removed for
malicious activity, the quarantine can be "dumped" such that can not
be restored and the container no longer holds any more quarantined
items or you can choose to be selective on what is dumped from
quarantine.
SOURCE
C'è anche un altro post su InfoSec SE che ha alcune informazioni aggiuntive:
In most anti-virus programs, the quarantine files are stored in
internal binary formats. Since there is no physical connection between
the infector file to your system (your anti-virus program works as the
storage format is also a plus point), it is not dangerous.