It is possible to give a USB flash drive / USB memory stick a behaviour that is very similar to autostarting CD’s and DVD’s. The only difference is that the user must press Enter or OK before the program is launched or the document shown, but after doing that things works in the same way. This poses a huge security risk because you can ,unwittingly, run malicious software such as worms an viruses.
This is where USB Guardian comes into rescue. The application is constantly scanning the USB port for a new removable storage device and this has led to a very small resource consumption when idle (which makes up to 99.5% from it’s time). USB Guardian is able to identify which USB flash drive is inserted and it detects potentially dangerous files on the drive.
In order to reduce the risk, first step is always to minimize and control the damages and this means isolating autorun.inf file from the removable dievice and blocking acces to it. In this state, USB Guardian considers the USB resource as locked.
Next step is to determine which additional files might pose a threat for your system and to lock them as well. This is accomplished by parsing the autorun.info file and extracting all references to executable files which might run upon inserting the USB drive.
Having locked all resources which are suspicous, the user can utilize the thumb drive as he/she sees fit without worrying about the dangerous executable files. Even if he/she would try to open the locked file, USB Guardian will prevent it by throwing an error.
It is possible, however, to delete all potentially dangerous code with one click by pressing the Delete All button.
The only way to access the locked files is to confirm manually that you know what you are doing and then you must unlock them. This flexibility gives USB Guardian a significant edge over other software apps which tend to be either too strict or too loose when it comes to USB worm and virus protection.