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Reverse Engineering

Questions tagged [decompress]

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Process of decoding a compressed file to get back to the original one. Some compression software may also include encryption or obfuscation in order to protect their format/algorithm.

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(original png) It's a multi level challenge. While examining through zsteg I found 2 zlib compressed file and a binary executable. I have uncompressed one of the zlib which gave long hex string, which ...
Roshan Kumar's user avatar
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I am trying decode some images from an old Japanese videogame. I am not very good at reverse engineering, nor at programming, and I can't make sense of what file format this is or how to go about ...
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I like a demo from a demoscene site called pouet.net, i want the source code of that file. i try to unpack the demo exe file with upx but it cannot unpack with it, because it is packed with so called ...
smallbee's user avatar
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For about a month I've been working towards trying to crack the file structure on the graphical assets from the old JumpStart CD-ROM games. A large percentage of these games do not have their sprites ...
bearyberriez's user avatar
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The firmware for this digital piano is supplied as a MIDI file with an EasyPlayer.exe (not sure if Wine can run this properly) binary to upload it. I'm wondering if there's a way to get at it's ...
Luke A. Guest's user avatar
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I recently decrypted a mobile game, after decrypting xxtea and luajit I got strange encryption file, it was an extra layer of encryption before finding the original .lua file content. I'm very ...
Neit's user avatar
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I'm trying to figure out how this old game is (de)compressing files, but I don't have much knowledge about file compression. I tried running the game from a debug tool to see if I could spot something ...
Oli's user avatar
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The program I am looking at creates 3 different tables. The first two tables are created at the same time, one entry at a time. Table 1 is 256 1 byte entries. Table 2 is 256 2 byte entries. All the ...
fishygobyebye's user avatar
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There is an application on iOS that collects data and encrypts it in the future. Data is already serialized at entry to the encryption function, they look like this(I tried to decode, restore the ...
solocef's user avatar
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I am looking for a way to read the content of these two files. If that is possible, please let me know. Google Drive link for the files
zhanshi123's user avatar
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I have a small spectrometer that measures in the spectral range of 740-1070nm. The device is commercial, and used to send the raw data to the manufacturer's server for decoding, but that does not seem ...
J-M's user avatar
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9 votes
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I'm recovering data from old tape cartridges from circa 1994, where the user had forgotten what software was used to write them, and it doesn't seem to be any format I recognize. Fortunately the file ...
Dmitry Brant's user avatar
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I've been trying to reverse engineer the format of data files from the 1997 video game Helicops. I have experience reverse engineering binary files from games of this period but limited exposure to ...
Reign of Error's user avatar
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I must be missing something obvious here. I cannot make sense of the following deflate stream. Steps: % wget https://github.com/lrq3000/mri_protocol/raw/master/SiemensVidaProtocol/Coma%20Science%...
tibar's user avatar
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I am attempting to reverse an animation format that uses (I think) some form of LZW for each of the frames. I have determined that a 12-bit code is used throughout the image. Here is a short target ...
Nathanael Gentry's user avatar
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