I have several files that a 3rd party program generated that have a .zip extension, however neither windows nor 7-Zip can extract it. In 7-Zip it does show me the file name of the uncompressed file however when I try to extract it I get the error
An attempt was made to move the file pointer before the beginning of the file.
I ran the file through TrID.NET, however it had not even a partial match on what the file was.
Here is the fist 51 bytes of the file.
offset: 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
hex: 14 00 08 00 08 00 C2 43 C6 3E 00 00 00 00 00 00 00 00 00 00 00 00 19 00 00 00 31 30 35 36 30 36 2D 32 30 31 31 30 36 30 33 31 33 34 31 34 36 2E 65 6E 63
ascii: . . . . . . . C . > . . . . . . . . . . . . . . . . 1 0 5 6 0 6 - 2 0 1 1 0 6 0 3 1 3 4 1 4 6 . e n c
Here are the things I have figured out looking at severial files and comparing the headers:
- Bytes 0-5 are always
14 00 08 00 08 00
in the examples I checked - Bytes 6-9 change per file, I don't think it is the uncompressed file size as it is much to big.
- Bytes 10-21 are always
00
in the examples I checked - Bytes 22-25 is the length of the filename of the compressed file.
- Bytes 26-50 is the compressed file name (
105606-20101020162359.enc
in this example)
Everything after the file name appears to be different per compressed file.
Does anyone know what this fileformat is?