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ASP_Volume2 Security #41238

Find hidden "back streamed" files on NTFS partitions. This code is a must for sec consultants.

With NTFS partitions, intruders can hide their toolkits behind a 'front file'. Explorer and DIR only show the front file and the size of the front file, leaving no clue as the hidden 'back streamed' files. This code finds them. You can back stream a file like this "copy MyTrojanProgram.exe SomeSystemFile.ini:MyTrojan.exe" SomSystemFile.ini will stay the same size and the backstreamed trojan will be almost undetectable.

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Recovered from Wayback Machine