General Chat Thread, MAKE USB WRITE PROTECTED in General; Hi All. Does any one have any knowledge about making USB read only using a software or any other method ...
5th June 2011, 02:10 PM #1
5th June 2011, 02:14 PM #2
If they're being run on only your computers, you could disable write access to USB devices in registry. But then it'll stop all USB devices, not just the one drive.
Will these be used outside of school/work? or only on computers you can setup/install software?
5th June 2011, 02:20 PM #3
- Rep Power
I randomly use my tools on clients PC. I was looking for any method to make my USB read only so that if I use my stick on other computers no Virus can edit my softwares on my USB stick. Any suggestions ? Thank you Steve
5th June 2011, 02:21 PM #4
Well is there any reason you can't just set the files to readonly in Windows? Aswell as making a custom autorun.inf to stop any being added.
5th June 2011, 02:30 PM #5
- Rep Power
I just tried now to make my software folders readonly (Which was showing read only already) and applied settings. I tried to do changes in text files, result = could not save changes, Then I tried to change files format, result= I could do that.
Steve how to make Autorun.inf file for my USB to stop viruses as you advised, can you describe in details please if possible. and Isnt that *.inf file going to be detected by my antivirus and deleted?
5th June 2011, 02:32 PM #6
Well changing file formats isn't writing over your code :P Just renaming it in a sense.
Originally Posted by HarrySBoura_Auckland
And autorun.infs are the normal files that are used for autorun, you can setup it up such that a flash drive has a portable AV installed on it, and autorun runs it. So it should nuke any virus when you load the drive.
5th June 2011, 03:27 PM #7
Although not full proof you can use a dumy file creator to fill up all of the free space on the drive meaning that most viruses will not be able to write to it. This does not protect from all forms but does give a limited bit of extra protection. This was recomended to me by someone else here a couple of weeks ago but I can't find the post. Here are soem links though Make USB drive write protected | Jared Heinrichs - Download NOD32 Dummy File Creator Utility 1.0 Free - This software will help you create dummy items in the folders you choose - Softpedia
The other thing that you you can look at for devent capacities with a built in switch is to get a USB SD card reader and some cheap larger SD cards to put in it, slightly bulkier but you do end up with propper write protect switch.
Like one of these http://pricespy.co.nz/product.php?e=242900
Edit: Heres the original post:
and the linked tool looks easier to use too.
Originally Posted by Arthur
Last edited by SYNACK; 5th June 2011 at 03:52 PM.
2 Thanks to SYNACK:
Arthur (5th June 2011), HarrySBoura_Auckland (6th June 2011)
5th June 2011, 04:41 PM #8
The USB card reader & SD card combo is a good idea in theory, but it's not actually a proper hardware write-protect switch...
From the same website...
SD Cards, while they have a write-protect switch, are actually no good for this purpose because it’s not actually hardware write protection – at best the card reader sends a signal to the operating system that the drive should be treated as read-only. The write-protect switch on the cards is read by a sensor that’s part of the card reader, and the card reader then passes along to the operating system whether the card is read-only. According to the specification from sdcard.org
A proper, matched, switch on the socket side will indicate to the host that the card is write-protected or not. It is the responsibility of the host to protect the card. The position of the write protect switch is unknown to the internal circuitry of the card.
Basically this means that either a) cheap card readers that lack the sensor or b) operating systems or malware that don’t respect the “please don’t write to this disk” flag can write to the drive. While this may not be likely, it’s also not as secure as you might think based on the presence of that switch. (Source
List of USB Flash Drives with Hardware Write Protection
5th June 2011, 06:10 PM #9
Look into forensic hardware write blockers.
5th June 2011, 07:06 PM #10
The only problem with forensic USB write blockers is their price. WiebeTech's start at $199 USD (unless you know of anything cheaper?).
5th June 2011, 11:07 PM #11
You can't do it permanently but you can build the stick as if it is a CD-ROM...if I can find the details tomorrow I will post details of some software for formatting the stick as ROM tomorrow...of course nobody can write to it unless they use the same software to undo the lock...
6th June 2011, 06:58 AM #12
- Rep Power
Hi Mate. Yea I tried this method before and I think this is the most secured one I came across so far. But even in this method any Virus I think can still delete your files. I was looking to find if we can anyway make our USB just read only so that no machine can edit it which I think could be near to impossible after my research so far but never no if someone got solution for this. Thank you for advise anyways. . cheers
Last edited by HarrySBoura_Auckland; 6th June 2011 at 07:17 AM.
6th June 2011, 07:18 AM #13
- Rep Power
How do you do it? If you don't mind please post it how can you build USB as if it is CD-ROM. Thank you
6th June 2011, 07:48 AM #14
@Cesil. Are you thinking of the U3 method which uses LPInstaller.exe to write a custom ISO image to a U3-compatible flash drive such as the SanDisk Cruzer?
6th June 2011, 08:54 AM #15
This is probably not useful at all and completely wrong but either way just a thought and some confirmation if it would work would be good - similar thought process to the dummy file creator but if you used truecrypt to create an encrypted file that took up all the space on the memory stick and store your files within the encrypted file or something along those lines ?
Am guessing there is a down side or something that won't work etc ?
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