How can i fool Windows about a file weight?

[Goja]

How can i make Windows believe (and so show) that a file is smaller or bigger than it is really? I'm sure some people knows how to make such things, but it must be complicated... Thanks in advance

 

[JackNaylorPE]

Ya can change date / time but not file size.

 

[vvhocare5]

You need to read up on NTFS (and FAT) file systems. What you are trying to do is to corrupt the file system. Yes you can do it, but it is not stable.

If you underreport the file size NTFS will recover the unused sectors and the extra data will be lost.

 

[Goja]

I want to fool it, so it wouldn't tell me there's an error or something... Somewhere on the far internet, an app for doing such thing must exist... Or someone must know how ot do it!

 

[Herr_Koos]

I want to fool it, so it wouldn't tell me there's an error or something... Somewhere on the far internet, an app for doing such thing must exist... Or someone must know how ot do it!

What exactly are you try to do here? I cannot imagine why you would want Windows to think a file is bigger/smaller than it actually is, unless it's for nefarious purposes.

 

[sminlal]

You can make a file smaller by removing data from it. Open it up in Notepad, delete some stuff from it, then save it again.

You can make a file bigger by adding data to it. Open it up in Notepad, type in a bunch of stuff, then save it again.

Warning - both of these actions may render the file unusable by whatever program normally reads it.

 

[amnotanoobie]

Would there be a legitimate reason for fooling around with the MFT rather than doing the Notepad thing?

 

[Goja]

Just hidding something

 

[Scotteq]

...a Trojan? Rootkit, perhaps?

We're not going to help you.

 

[Goja]

I didn't even know what was a rootkit before now, thank your for upgrading my knowledge :lol: Anyway i will tell you why i need to hide something, what is it, if you can answer. So, do you know how to do that?

 

[jaguarskx]

Since there does not seem to any legitiment use for falsifying the size of a file, I do not see any reason for anyone to answer this person's question.

If he is trying to create a trogan / virus / worm, then I'm sure there are more "appropriate" forums for such a question.

 

[Goja]

Did you even read my last message? I said i will give the reason if someone has the knowledge to do it.

 

[Herr_Koos]

Did you even read my last message? I said i will give the reason if someone has the knowledge to do it.

OK, sure. So if someone tells you how to do it, how do we know you won't say: "Kthxbye!" and never post here again?

 

[sminlal]

Did you even read my last message? I said i will give the reason if someone has the knowledge to do it.

We're having a hard time understanding why you *wouldn't* be comfortable sharing the reason unless it's chicanery...

 

[robjohnston]

this stinks!

 

[dmroeder]

this stinks!

Sorry, that was me...

 

[Goja]

I SAID tell me NOT HOW TO DO IT but just YOU KNOW HOW then i will send you a PM and tell you what i wanna do. It's fair, no?

 

[Scotteq]

The answer is 'No'.

 

[Chewbert]

Ah the poor guy just wants to hide his porn stash. Just stick with archiving and renaming the files to look like temporary files, or maybe creating a separate partition that you can remove drive letter associations from so that it's "invisible" like the rest of us.

 

[mindless728]

I SAID tell me NOT HOW TO DO IT but just YOU KNOW HOW then i will send you a PM and tell you what i wanna do. It's fair, no?

actually no, learn how to do it yourself, because like people above have said, there is no reason to need to do this unless you need to hide something

 

[serbianem]

How do you know he didn't find a hidden file on his system (like I just did) which advertised itself as 50Gigabytes smaller than it actually was?
But I guess the point of view here is to not give out information in the remote chance that someone uses it for mischief. Bunch of optimists, all of you. Make the world dumbed down so that the impact of one person with knowledge making trouble is all the worse.
Thanks guys.

 

[ricno]

What you are trying to do is to corrupt the file system. Yes you can do it, but it is not stable.

If you underreport the file size NTFS will recover the unused sectors and the extra data will be lost.

There is actually a supported way to do this in NTFS. But if the general opinion in the thread is that there is something strange with the request then I should perhaps not name the feature.

 

[Herr_Koos]

How do you know he didn't find a hidden file on his system (like I just did) which advertised itself as 50Gigabytes smaller than it actually was?
But I guess the point of view here is to not give out information in the remote chance that someone uses it for mischief. Bunch of optimists, all of you. Make the world dumbed down so that the impact of one person with knowledge making trouble is all the worse.
Thanks guys.

9-month old thread, this. Why resurrect it?

 

[mibix19]

How do you know he didn't find a hidden file on his system (like I just did) which advertised itself as 50Gigabytes smaller than it actually was?
But I guess the point of view here is to not give out information in the remote chance that someone uses it for mischief. Bunch of optimists, all of you. Make the world dumbed down so that the impact of one person with knowledge making trouble is all the worse.
Thanks guys.

50Gigs smaller than it was!!!! ? What sort of files are 50Gig +

 

[ricno]

50Gigs smaller than it was!!!! ? What sort of files are 50Gig +

Few files, but I guess he meant that he had a file where someone had attached a hidden 50 GB part, but Windows reported only the smaller size.