File Format Mystery - 1 - Challenge
BotB Academy Bulletins
 
 
Level 31 Chipist
Strobe
 
 
 
post #28356 :: 2013.06.03 9:07am :: edit 2013.06.17 1:12am ::
  
  rainwarrior, Slimeball and Interrobang Pie liēkd this
The challenge was:
You download http://lmao.rotfl.at/upload/Str0be/Formats.zip

Then try to determine what format each file was originally.
These are just snippets of the original files, most or all of the headers are removed, and there is only a portion of the data left.

Tools needed: Your favorite hexeditor, or if you're masochistic, notepad.

Send your answers to strobeflux@gmail.com in a list like:
Form01 = .gif
Form02 = no freaking idea

...and include your botb nick.

Topic for the e-mail could be "File Format Challenge" so it's easy to spot.

Scoring
------------------------------
There is 1 point per one right answer generally.

Exception:
For Form07.bin you will gain 1 point if you get correct answer, and 1 point extra if you pick out what sub segment of the file this is.

Total points possible: 11
-------------------------------

I understand that this is not a challenge for everyone,
but i hope to get some participants, if I get 5 or more
people who tried seriously, there will be a 500 boon price
at the end of the week. (It ends on Sunday)

if there is a tie, there will be 250 boons for each winner.

Happy haxxorings!

Edit: This is medium challenge for people familiar with fileformats,
because i left some (but subtle in some cases) hints in the filedata
that could be used to determine the origins.
There are no totally random data in this particular challenge, nor
are there any very unknown formats.

----------------------------------------------------------
RESULTS --- further reading in long post below

funnypowers - Score: 8/11
rainwarrior - Score: 6/11
Slimeball - Score: 5/11
CeriX - Score: 4/11
zanzan - Score: 0.2/11
 
 
Level 28 Chipist
KungFuFurby
 
 
 
post #28388 :: 2013.06.03 2:34pm ::
This one is giving me a run for my money... I don't recognize any of these.
 
 
Level 19 Mixist
skinnyhead2000
 
 
 
post #28390 :: 2013.06.03 3:37pm ::
  
  Doxic liēkd this
these files are saying they're SNES ROMs

it appears I have lost before I could have tried hehehe
 
 
Level 26 Chipist
rainwarrior
 
 
 
post #28395 :: 2013.06.03 9:00pm ::
 
 
Level 31 Chipist
Strobe
 
 
 
post #28396 :: 2013.06.03 11:42pm :: edit 2013.06.04 8:44am ::
---
 
 
Level 31 Chipist
Strobe
 
 
 
post #28401 :: 2013.06.04 8:43am :: edit 2013.06.04 9:40am ::
Removed due to recent policy changes!
 
 
Level 17 Playa
Grumskiz
 
 
 
post #28402 :: 2013.06.04 10:52am ::
  
  skinnyhead2000, frogluigi, Jangler, Slimeball and Strobe liēkd this
This Challenge is easy!
The file you provide (I can only find a single one) is obviously a .zip file!
The ending ".zip" is a dead give away :3
Also it seems to be a complete file, rather than a chunk.

Jokes aside...I'll try what I can find, but so far it didn't go too well D:
 
 
Level 31 Chipist
Strobe
 
 
 
post #28403 :: 2013.06.04 10:58am ::
  
  goluigi, frogluigi and Rainbow Dash liēkd this
Man, that would have been even funnier if it was someone saying that genuinely, it would have been the cutest thing ever!
 
 
Level 12 Pixelist
CeriX
 
 
post #28438 :: 2013.06.06 4:59am ::
Just sent my try... :-)

Shouldn't the second '??' in the participant list be '11'? :-)
(e.g. "rainwarrior - Score: ??/11")
 
 
Level 31 Chipist
Strobe
 
 
 
post #28439 :: 2013.06.06 5:19am ::
Yer right! i just blanked them both out in panic when i realized that maybe i shouldn't post results yet ;)
Got your answers too!
 
 
Level 27 chipist
zanzan
 
 
 
post #28440 :: 2013.06.06 5:30am ::
  
  orion, Doxic, zebra, Jangler and Xyz liēkd this
here are my results:

01: .diz
02: .1st
03: .bin
04. .doc
05. .torrent
06. .torrent
07. .wad (mission e2m4)
08. .cfg
09. .ini
10. deflemask.exe
 
 
Level 31 Chipist
Strobe
 
 
 
post #28554 :: 2013.06.09 12:00am :: edit 2013.06.10 7:09am ::
  
  Slimeball liēkd this
Challenge ends on June 16th!
 
 
Level 31 Chipist
Strobe
 
 
 
post #28610 :: 2013.06.10 7:09am ::
  
  Slimeball liēkd this
Extended for a week! gogogogogo!
 
 
Level 26 Chipist
rainwarrior
 
 
 
post #28653 :: 2013.06.11 6:05pm ::
I hope this extra week brings in fresh blood!
 
 
Level 28 Renderist
Slimeball
 
 
 
post #28729 :: 2013.06.15 11:02am ::
I tried, I think i got at least one right. Also I cried.

You winners better give me some for b00ns for pushing the amount of entrants up to five. ;3
 
 
Level 31 Chipist
Strobe
 
 
 
post #28731 :: 2013.06.15 12:26pm ::
I'm really wondering if i should treat zanzans submissions seriously though ;)
 
 
Level 31 Chipist
Strobe
 
 
 
post #28757 :: 2013.06.16 1:56pm :: edit 2013.06.16 10:59pm ::
  
  Slimeball, CeriX, rainwarrior, orion and MS liēkd this
  
  zanzan hæitd this
RESULTS!!!!
------------------

1.Funnypowers (8 correct)
2.rainwarrior (6 correct)
3.Slimeball (5 correct)
4.Cerix (4 correct)
5.zanzan (0.2 correct)

Due to zanzan's attempt being a troll one, there is no 500
boon price, it has been reduced to 300 boons!
-------------------

Explanation for Form09.bin due to no one got it:
The last 2 bytes of the file is the JPEG End Marker.
this is the end of a JPEG stream.
I knew this was the toughest one of all, i just
included it to see how far i could go.

CORRECT ANSWERS
---------------------
Form01 = .xm
Form02 = .exe
Form03 = .wav/riff
Form04 = .mp3
Form05 = .mid
Form06 = .png
Form07 = .avi (subcategory audio IndexList)
Form08 = .msi
Form09 = .jpg
Form10 = .mod

And the guesses...

CeriX
---------------------
Form01 = .xm 1
Form02 = .crt (C64 Cartridge Format)
Form03 = .wav 1
Form04 = .mp3 (lame encoded) 1
Form05 = .bmp
Form06 = .png 1
Form07 = ???
Form08 = .exe
Form09 = ???
Form10 = ???
Result: 4/11

funnypowers
--------------
01 - ???
02 - exe 1
03 - wav 1
04 - mp3 1
05 - midi 1
06 - png 1
07 - avi, audio chunk index 1 + 1
08 - msi 1
09 - ???
10 - ???
Result: 8/11


rainwarrior
-----------------
Form01 = .XM 1
Form02 = .EXE 1
Form03 = .WAV (signed 16 bit) 1
Form04 = .MP3 1
Form05 = .SAP
Form06 = .MP4
Form07 = .NES (CHR segment)
Form08 = .MSI 1
Form09 = .DMF
Form10 = .MOD 1
Total: 6/11 Points!

Slimeball
----------------
Form01.bin - XM 1
Form02.bin - :(
Form03.bin - :(
Form04.bin - MP3 1
Form05.bin - MIDI 1
Form06.bin - PNG 1
Form07.bin - :(
Form08.bin - MSI 1
Form09.bin - :(
Form10.bin - BMP
5/11

zanzan
-----------------
01: .diz
02: .1st
03: .bin (to be fair, this is technically correct) 0.2 points awarded.
04. .doc
05. .torrent
06. .torrent
07. .wad (mission e2m4)
08. .cfg
09. .ini
10. deflemask.exe
0.2/11
 
 
Level 9 Playa
Delek
 
 
post #28762 :: 2013.06.16 9:07pm ::
I don't get why a .bin is a technically correct answer if the file was a .WAV file. :O
 
 
Level 12 Pixelist
CeriX
 
 
post #28765 :: 2013.06.16 10:01pm ::
  
  goluigi and Slimeball liēkd this
Because the .exe was changed to a .bin! ;-)

So writing .bin for all ten entries would have given me 2 points!? ;-)
 
 
Level 31 Chipist
Strobe
 
 
 
post #28769 :: 2013.06.16 10:43pm ::
  
  Slimeball liēkd this
Delek, because all of the files are binary in some way ;)
(also they were named .bin), but I only gave zanzan that 0.2 points
because he would have had 0 otherwise! it wouldn't have worked to use ".bin" as answer for all entries!
 
 
Level 29 Mixist
goluigi
 
 
 
post #28771 :: 2013.06.16 11:00pm ::
  
  Doxic, Slimeball and Strobe liēkd this
%77%6F%6F%6F%6F%6F%6F%6F%6F%6F%6F%6F%6F%6F%6F%6F%6F%6F%6F%6F%6F%77
 
 
Level 28 Chipist
null1024
 
 
 
post #28773 :: 2013.06.16 11:44pm ::
  
  Strobe, goluigi and Slimeball liēkd this
I did attempt this. I guessed MOD for the first one because of the way the data looked, but then I looked at a few MODs and gave up on everything.

>_<
 
 
Level 7 Criticist
funnypowers
 
 
post #28794 :: 2013.06.17 8:42pm ::
  
  Slimeball, Doxic and Jangler liēkd this
congratulations
 
 

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