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Questions tagged [file-format]

File format refers to the way information and data is encoded and stored in a computer file.

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binwalk guess wrong LZ4 compressed data format

I have a stock Netgear switch firmware file: https://www.downloads.netgear.com/files/GDC/GS316EP/GS316EP_GS316EPP_V1.0.3.7.zip When I do binwalk, it gives me at position 0x769BDC a description as &...
Julionabi's user avatar
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How to decrypt and analyse data from desktop application

I have a project where I need to analyse some data from a desktop application (WeChat) on Windows. More specifically, I am looking to extract URLs when I search for articles using a particular keyword....
Nico's user avatar
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VxWorks flat binary file

VxWorks has a "flat binary file" format in which the initial 8 byte values are 45 53 54 46 42 49 4E 52 (ESTFBINR if interpreted as ASCII). I know very little about their content except: ...
g1l1t1's user avatar
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Arrays of ascending/descending/repeating integers in proprietary file formats

When looking at a file in a hex editor/viewer in an attempt to "figure it out", I often come across these blocks that are extremely repetitive. They tend to be int8, int16, or int32 (signed ...
qwerty keyboard's user avatar
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Requesting Guidance To Understand SuperScape's .VCA Format: Lego Creator Knights Kingdom

I hope you all are doing well and staying safe. I am in the process of trying to understand how SuperScape stored data in their .VCA/LCA format, so I can extract the original SHAP and PAL data from ...
amoebame's user avatar
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39 views

DesignAKnit shape (.shp) file format

With help from information provided by members of this forum, I have more or less succeeded in reverse engineering DesignAKnit pattern (.stp) files. Has anybody worked on the shape files? I have never ...
Tom Price's user avatar
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How are those time positions values encoded in bytes?

I am reversing a file with no documentation. I identified chunks of data (8 bytes); on the left is what is expected (hours, minutes, seconds, 1/60 of second) and on the right, the raw bytes. // 00:00:...
Soleil's user avatar
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Anyone familiar with this "AceDB" file format?

I'm currently engrossed in penetration testing my Samsung SPH-M330. And to be fair, I have found a couple entry points (WHY ARE YOU PEOPLE USING STRCPY()!?) Anyway, I'm now taking a look at "/...
qwerty keyboard's user avatar
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Help reading a rekordbox edb file

My questions is similar to this, albeit slightly different: Help reversing a EDB database file for Pioneers Rekordbox software The rekordbox 5 library export produces a 'datafile.edb' file with useful ...
laker93's user avatar
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NTFS files with 0 size, filestamp 01/01/1970 and "?" at the beginning of file name not deletable

I tried to backup millions of files from ext4 to an external NTFS drive. It took ages and at the end gave up, the external drive stalled. After a reboot and successful ntfsfix command I wanted to ...
c1ph4's user avatar
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What file format could this password safe file be in?

I found a file named passwords.passsafe in an old backup of mine, with a timestamp from July 2000. I'm not 100% sure I remember the password. I have unsuccessfully tried to decrypt it using Password ...
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Help Needed With Finding Image Data In DOS Game File

I have been analysing, an File called FW190AS.PAC from a 16 Bit Game called Secret Weapons Of The Luftwaffe, in a Hex Editor, the Bytes are displayed in Little Endian format. My aim with this game, is ...
Edward Winch's user avatar
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Which tools can I use to extract texts from ebc files in Nintendo Switch ROM

I encountered *.ebc files when i was trying to yank the dialog texts from the Nintendo switch game for my research project. The dialogs seems to be in binary ebc files. What kind of file format is ...
ganqqwerty's user avatar
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Need help extracting AP_Pack .obb files

I'm trying to extract the files for the series of 4 games - Sorcery!, which are in the format .obb. Thanks to a Hex editor I saw that the .obb was an AP_Pack, and looking for more information on the ...
Maneki's user avatar
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How is the language of a font glyph determined?

A glyph holds data such as its name and contour points. But how do you determine where the characters of one language end and another begins? Is there a written standard that says language X starts at ...
user3208218's user avatar
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237 views

What Are These Four Bytes In My File Doing

I have a file that I'm trying to reverse engineer that is generated by an application. The file itself is fairly simple, but there are 4 bytes whose purpose I can't determine. The file consists of a ...
Jim S.'s user avatar
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Decyphering 8kbps audio file format used in Solar Chanting Lotus

I'm trying to reverse engineer a solar powered chanting lotus flower so that I might replace the built in audio with something more interesting. The main chip (JL16B-083A - haven't been able to find ...
Captain Lavender's user avatar
1 vote
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101 views

How do I reverse engineer a file uploading api?

The API is pretty old and is written in C#, I tried debugging the API calls with mitmproxy. This is the successful API call (manually uploading file) but when I tried curling it, it gave me this error ...
cantcode023's user avatar
8 votes
1 answer
453 views

Compression algorithm from very old tape backup?

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
2 votes
2 answers
96 views

Decoding a list of integer values in unknown format

I'm attempting to reverse engineer a binary file format which is used to encode a list of integer values. I can't work out how this format works, as the number of bytes used to encode each value ...
ndawson's user avatar
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How to decode this rbf file?

I am trying to decode this file but so far I have no luck. I tried with binwalk and other decoders but still did not see a way of decoding. Any help, more than welcome. The file supposed to have GPS ...
Ivan Felipe Rodriguez's user avatar
2 votes
0 answers
55 views

PDF file have two trailers?

If I analyse multiple PDF files with a hex editor, I see that all of them have two trailers. That's possible if an object has changed or renewed (https://blog.idrsolutions.com/multiple-trailers-in-a-...
Moooz's user avatar
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1 vote
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Extracting contents of unknown file format

I would love some help on working with this file format. I have this archived file from this abandonware game that I like to mess around with, and I have tried all sorts to try and expand it to ...
Harry's user avatar
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LZ4N file format - file decoding

I'm trying to decode a file that is part of device firmware. Unfortunately it comes RIFF<...>WAV format wrapped / packed with strange LZ4-like format. Non of linux available lz4 tools do ...
Krystian's user avatar
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1 answer
147 views

reverse engineering image format

Can anyone help me with this? I think it's a targa image
rod's user avatar
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Is it possible to recover/acquire schema of FlatBuffers binary file

Without having access to the schema file, is it possible to recover the schema of a binary FlatBuffers file by examining the file? Also, some of those files contain encrypted scalars. If you can ...
Lynn B.'s user avatar
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3 votes
0 answers
553 views

Reverse-engineering the Sony Camset (Camera Settings) file format

Context Newer Sony cameras have functionality that allows them to: save the current camera settings (shooting mode, auto-focus mode, etc.) to a file load the camera settings from a file into the ...
Raleigh L.'s user avatar
1 vote
1 answer
385 views

Decrypting .toc file

So I have a few files from a game on my pc, most of which are .toc files I believe this means they are a "table of contents" as the ending suggests, but my attempts to read them have been ...
Echology's user avatar
3 votes
0 answers
215 views

Reverse-engineering the S-Note (.spd) file format?

Context Samsung phones have an application called 'S Note' that let you use the stylus/keyboard to take notes in a free-form format, similar to Microsoft OneNote. These notes are stored in files ...
Raleigh L.'s user avatar
2 votes
0 answers
59 views

How do I read/edit a .xuk file extension?

I am trying to reverse engineer a license key for some software, the company that made it went out of business. In doing so, if you didn't already have the key their $50,000 machines become ...
Xalen's user avatar
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What kind of compressing/encoding is this?

Currently, I am trying to understand .amxd file formats. I firstly tried to open it in VIM to see what this contains. Turns out there is a JSON file and others files also in the file (I can see PNG ...
Vexcited's user avatar
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1 answer
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Floating point number mangled in a proprietary file

I'm reverse engineering a proprietary file format that contains a set of points to construct a curve (FL Studio's .fnv format). What i have trouble with in particular is how the Y-coordinates are ...
artemetra's user avatar
2 votes
1 answer
317 views

Figuring out WhatsApp's receipt info storage format

I am trying to figure out and document the structure of WhatsApp's database (iOS version). Most data is easily readable, but the table ZWAMESSAGEINFO has a BLOB-column ZRECEIPTINFO. I am guessing this ...
GeF's user avatar
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1 vote
1 answer
222 views

Making sense of an encoded JSON string

I extracted a game file, which is in JSON format, it's a bit too long, so I'll omit parts of it: {name: "\xEE\xB5k~u\u03D7\x80\xF8\xE0\xE2\xC5\xCA\xEE\u04CF\x90\xBE\xD8Cs\xFE\xA5Ec\u007F\u0006\...
Agnarsh's user avatar
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0 answers
98 views

How to determine file system or open unknown .img file

I have a .img file which will not mount, open, extract or anything within Windows using either the tools built into Windows 10, WinRAR or 7-Zip, they all return errors. I'm trying to look at data ...
Dan Lewis's user avatar
4 votes
1 answer
1k views

Deciphering the format of an unknown file

I am attempting to discover the exact format/encoding of a file. These files stem from closed-source analysis software we use on a daily basis. I would like to obtain the format in order to create an ...
wptmdoorn's user avatar
0 votes
0 answers
286 views

What is .pb file format?

TL;DR: What file format is this (if it's not a private file format) and how do I parse it? Before I say anything, I want to say that I am new to reverse engineering and StackExchange. I am trying to ...
user39240's user avatar
0 votes
1 answer
131 views

determine proprietary 16-bit floating-point format

Background / Introducion CAN message Mercedes-Benz, cannot determine 16-bit data type for temperature. 7E 00 32 01 37 00 According to @rnd-ash (who has reverse engineered ACTIA Basic XS Monitor ...
alecxs's user avatar
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2 votes
1 answer
404 views

Proprietary 3D Format Reverse Engineering: What Could These Numbers And Matrices Represent?

I'm trying to reverse engineer a model format from an older Russian game (Pathologic) with limited success. It is a proprietary model format not recognized by any converters/editing tools (believe me, ...
Xtal44's user avatar
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0 votes
1 answer
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Issue in opening a file type after unzipping

I downloaded a file from this link https://storage.cloud.google.com/gresearch/smallcnnzoo-dataset/cifar10.tar.xz, and I successfully downloaded the archive file.I unzipped it using 7-Zip. After ...
ayesha shah's user avatar
3 votes
1 answer
378 views

Reverse engineering Roland TR-8S kit file format .t8k

I'm trying to figure out the file format that the Roland TR-8S drum machine uses for importing/exporting drum kits. My goal is to replace the sample (PCM) data within a kit. It's a proprietary binary ...
Michael Ganß's user avatar
0 votes
2 answers
648 views

Open unknown image format (probably a RAW image)

I copy image files here from a linux based system which ends with .bin. Unfortunately I don't know how to open it. The goal is to convert images to this format later. What I have already tried: Open ...
Alonia's user avatar
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0 answers
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reversing an HDL file [closed]

I was given an HDL file with the following content: i was asked to reverse it and retrieve the value of in , how can i do it please knowing that i have the value of out? thanks
Doudou's user avatar
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Cannot find audio file type

I'm trying to find the audio file type of this file (extension wtj) around 8 minutes). I extracted it from a music box. I've tried many things: Open in Winamp and VLC => no luck Open with ...
Daniel's user avatar
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What type of file has the file signature 'BOOT'?

I have a .bin file which I am trying to disassemble into something that I can edit. Given that binary files can contain just about any binary data, I found it difficult to assess what file data is ...
Xiddoc's user avatar
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0 votes
2 answers
84 views

how do i use the text like in pe files?

I extracted pe file from another pe file and I saved it. I want it execute but when I saved file computer sees it like text file. Altough my actual file starting with "4d 5a" computer sees ...
Just a human's user avatar
2 votes
1 answer
1k views

Reverse engineering a .byte file format

I've dug into files of a game that was made in Unity (which uses C# language)... and i was interested in extracting 3D models and textures etc. I understand that data and obb are separate, BUT! In my ...
user35770's user avatar
0 votes
0 answers
2k views

Need help learning to extract and modify PS1 ISO files

I was wanting to make a randomizer for a playstation game, Parasite Eve 2. I've spent a ton of time trying to figure this out just googling around and eventually wound up here. Does anyone have an ...
NecroCorey's user avatar
0 votes
1 answer
324 views

Detecting and reading embedded filesystems on desktop Linux

I have some data from a NAND chip, dumped using the built in nanddump utility on the embedded device. This is the device information: https://openwrt.org/toh/bt/homehub_v5a The NAND chip is 128MiB ...
moo's user avatar
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1 vote
2 answers
422 views

Opening an undocumented 90s graphics format

I've managed to extract some graphics files from an archive of an old game. Haven't found anything about it online, so I'm trying my luck here, prehaps someone knows a similar format that can help me. ...
mindoverflow's user avatar

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