Embedded files - Revision history

Rvdog815: Reverted edit by Edgar181's sock puppet 27 (talk) to last revision by imported>MarioMario456

2024-08-22T23:10:42Z

Reverted edit by Edgar181's sock puppet 27 (talk) to last revision by [[User:imported>MarioMario456|imported>MarioMario456]]

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Edgar181's sock puppet 27 at 14:01, 22 August 2024

2024-08-22T14:01:07Z

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imported>MarioMario456: fix dead link

2022-06-05T15:01:47Z

fix dead link

← Older revision		Revision as of 15:01, 5 June 2022
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	[[Image:Jpg+rar.jpg\|thumb\|As explained by this confusing collection of boxes]]		[[Image:Jpg+rar.jpg\|thumb\|As explained by this confusing collection of boxes]]
	An embedded file is a file that is stored or hidden inside another file, particularly inside an image which may then be posted to the *chans. For example, [[Wiktionary:~~Concatenate~~\|concatenating]] a JPEG file with a RAR file produces an '''embedded archive''' which can be read either as a JPEG or a RAR, depending on how it's opened.		An embedded file is a file that is stored or hidden inside another file, particularly inside an image which may then be posted to the *chans. For example, [[Wiktionary:concatenate\|concatenating]] a JPEG file with a RAR file produces an '''embedded archive''' which can be read either as a JPEG or a RAR, depending on how it's opened.

	== File concatenation ==		== File concatenation ==

imported>CucKHtet: /* Snowcrash format */ methods

2021-08-09T10:17:50Z

Snowcrash format: methods

← Older revision		Revision as of 10:17, 9 August 2021
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	=== Snowcrash format ===		=== Snowcrash format ===
	[[Image:Snowcrash_guide.jpg\|thumb\|A guide on making and extracting snowcrash images.]]		[[Image:Snowcrash_guide.jpg\|thumb\|A guide on making and extracting snowcrash images.]]
	Archives and other types of files embedded in Photoshop RAW files and converted to PNG are also sometimes posted on 4chan. These have become known as "snowcrashes." <br />		Archives and other types of files embedded in Photoshop RAW files and converted to PNG are also sometimes posted on 4chan. These have become known as "snowcrashes." [https://archive.is/6yKi6 4chan thread] [https://archive.is/WWula #2] <br />
	[https://github.com/rekcuFniarB/File2PNG Version for *nix] - Binary to PNG. ~~<br~~ />
	[https://github.com/fangfufu/Converting-Arbitrary-Data-To-Video/ other proposition for *unix] - Binary to MP4.~~<br />~~		because there is no consensus, several scripts which solve the same problem in different ways
	[https://streamable.com/g1qsg9 effect 2] ~~<br />~~		* [http://ghostbin.com/paste/O6NB2 python script] - Probably the most liked of anons, because you you can create mosaics [https://i.imgur.com/R7EwBOy.png like this one]
	[https://~~archive~~.is/~~6yKi6 4chan thread~~] ~~[https://archive.~~is~~/WWula #2]~~		* [https://github.com/rekcuFniarB/File2PNG Version for *nix] - Binary to PNG. it's [https://i.imgur.com/HqdA6pb.png Simple snowcrash], don't even recover this you dumb retard, imgur it compresses the images and this example won't work.
			* [https://github.com/fangfufu/Converting-Arbitrary-Data-To-Video/ other proposition for *unix] - Binary to MP4. [https://streamable.com/g1qsg9 example effect]. because the encoding does not contain any color information, which would be damaged, so you can upload to even [[youtube\|jewtube]] and it will still work after compression.
			* The same like above but by [https://github.com/karaketir16/file2video QR codes] Output video size likely 150-450 times larger than input file but hey, who cares, since youtube is your cloud

	== Steganography ==		== Steganography ==

imported>CucKHtet: /* Snowcrash format */ final

2021-08-01T06:01:16Z

Snowcrash format: final

← Older revision		Revision as of 06:01, 1 August 2021
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	[[Image:Snowcrash_guide.jpg\|thumb\|A guide on making and extracting snowcrash images.]]		[[Image:Snowcrash_guide.jpg\|thumb\|A guide on making and extracting snowcrash images.]]
	Archives and other types of files embedded in Photoshop RAW files and converted to PNG are also sometimes posted on 4chan. These have become known as "snowcrashes." <br />		Archives and other types of files embedded in Photoshop RAW files and converted to PNG are also sometimes posted on 4chan. These have become known as "snowcrashes." <br />
	[https://~~pastebin~~.com/~~FWKkKmpU~~ Version for *nix] ~~(ffmpeg required)~~ - Binary to PNG. <br />		[https://github.com/rekcuFniarB/File2PNG Version for *nix] - Binary to PNG. <br />
	[https://github.com/fangfufu/Converting-Arbitrary-Data-To-Video/ other proposition for *unix] ~~(also ffmpeg required)~~ - Binary to MP4.~~<br />~~		[https://github.com/fangfufu/Converting-Arbitrary-Data-To-Video/ other proposition for *unix] - Binary to MP4.<br />
	~~[https://www.lainchan.org/layer/thumb/1626766441980-0.png effect 1]~~<br />
	[https://streamable.com/g1qsg9 effect 2] <br />		[https://streamable.com/g1qsg9 effect 2] <br />
	[https://archive.is/6yKi6 4chan thread] [https://archive.is/WWula #2]		[https://archive.is/6yKi6 4chan thread] [https://archive.is/WWula #2]

imported>CucKHtet: /* Snowcrash format */ 4chan

2021-07-21T14:54:26Z

Snowcrash format: 4chan

← Older revision		Revision as of 14:54, 21 July 2021
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	=== Snowcrash format ===		=== Snowcrash format ===
	[[Image:Snowcrash_guide.jpg\|thumb\|A guide on making and extracting snowcrash images.]]		[[Image:Snowcrash_guide.jpg\|thumb\|A guide on making and extracting snowcrash images.]]
	Archives and other types of files embedded in Photoshop RAW files and converted to PNG are also sometimes posted on 4chan. These have become known as "snowcrashes."		Archives and other types of files embedded in Photoshop RAW files and converted to PNG are also sometimes posted on 4chan. These have become known as "snowcrashes." <br />
	[https://pastebin.com/FWKkKmpU Version for *nix] (ffmpeg required) - Binary to PNG. <br />		[https://pastebin.com/FWKkKmpU Version for *nix] (ffmpeg required) - Binary to PNG. <br />
	[https://github.com/fangfufu/Converting-Arbitrary-Data-To-Video/ other proposition for *unix] (also ffmpeg required) - Binary to MP4.<br />		[https://github.com/fangfufu/Converting-Arbitrary-Data-To-Video/ other proposition for *unix] (also ffmpeg required) - Binary to MP4.<br />
	[https://www.lainchan.org/layer/thumb/1626766441980-0.png effect 1]<br />		[https://www.lainchan.org/layer/thumb/1626766441980-0.png effect 1]<br />
	[https://streamable.com/g1qsg9 effect 2]		[https://streamable.com/g1qsg9 effect 2] <br />
			[https://archive.is/6yKi6 4chan thread] [https://archive.is/WWula #2]

	== Steganography ==		== Steganography ==

imported>CucKHtet: /* Snowcrash format */ brr!

2021-07-21T14:53:07Z

Snowcrash format: brr!

← Older revision		Revision as of 14:53, 21 July 2021
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	[[Image:Snowcrash_guide.jpg\|thumb\|A guide on making and extracting snowcrash images.]]		[[Image:Snowcrash_guide.jpg\|thumb\|A guide on making and extracting snowcrash images.]]
	Archives and other types of files embedded in Photoshop RAW files and converted to PNG are also sometimes posted on 4chan. These have become known as "snowcrashes."		Archives and other types of files embedded in Photoshop RAW files and converted to PNG are also sometimes posted on 4chan. These have become known as "snowcrashes."
	[https://pastebin.com/FWKkKmpU Version for *nix] (ffmpeg required) - Binary to PNG.		[https://pastebin.com/FWKkKmpU Version for *nix] (ffmpeg required) - Binary to PNG. <br />
	[https://github.com/fangfufu/Converting-Arbitrary-Data-To-Video/ other proposition for *unix] (also ffmpeg required) - Binary to MP4.		[https://github.com/fangfufu/Converting-Arbitrary-Data-To-Video/ other proposition for *unix] (also ffmpeg required) - Binary to MP4.<br />
	[https://www.lainchan.org/layer/thumb/1626766441980-0.png effect 1]		[https://www.lainchan.org/layer/thumb/1626766441980-0.png effect 1]<br />
	[https://streamable.com/g1qsg9 effect 2]		[https://streamable.com/g1qsg9 effect 2]

imported>CucKHtet: /* Snowcrash format / nix

2021-07-21T14:52:40Z

Snowcrash format: *nix

← Older revision		Revision as of 14:52, 21 July 2021
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	[[Image:Snowcrash_guide.jpg\|thumb\|A guide on making and extracting snowcrash images.]]		[[Image:Snowcrash_guide.jpg\|thumb\|A guide on making and extracting snowcrash images.]]
	Archives and other types of files embedded in Photoshop RAW files and converted to PNG are also sometimes posted on 4chan. These have become known as "snowcrashes."		Archives and other types of files embedded in Photoshop RAW files and converted to PNG are also sometimes posted on 4chan. These have become known as "snowcrashes."
			[https://pastebin.com/FWKkKmpU Version for *nix] (ffmpeg required) - Binary to PNG.
			[https://github.com/fangfufu/Converting-Arbitrary-Data-To-Video/ other proposition for *unix] (also ffmpeg required) - Binary to MP4.
			[https://www.lainchan.org/layer/thumb/1626766441980-0.png effect 1]
			[https://streamable.com/g1qsg9 effect 2]

	== Steganography ==		== Steganography ==

imported>LOLTroll at 11:51, 4 August 2017

2017-08-04T11:51:53Z

← Older revision		Revision as of 11:51, 4 August 2017
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	[[File:CP_Directions.jpg\|thumb\|Because of this image, all other images on [[eBaumsworld.com]] contain [[CP\|child pornography]].]]		[[File:CP_Directions.jpg\|thumb\|Because of this image, all other images on [[eBaumsworld.com]] contain [[CP\|child pornography]].]]

	One of the most common ways of embedding files into images is simple [[Wikipedia:Concatenation\|concatenation]]. That is, the new file contains the data from the first file followed by the data from the second. Which file you see depends on the program you open it with.		One of the most common ways of embedding files into images is simple [[Wikipedia:Concatenation\|concatenation]]. That is, the new file contains the data from the first file followed by the data from the second. Which file you see depends on the program you open it with.

	This only works for certain combinations of file types. Many types of files will work for the first part, but it should be a GIF, JPEG, or PNG file if you want to post it to 4chan. The second file should be one of the following types:		This only works for certain combinations of file types. Many types of files will work for the first part, but it should be a GIF, JPEG, or PNG file if you want to post it to 4chan. The second file should be one of the following types:
	*[[7-Zip\|7Z]]		*[[7-Zip\|7Z]]
	*[[Winrar\|RAR]]		*[[Winrar\|RAR]]
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	In addition:		In addition:
	*Broken web pages occasionally append HTML to the end of the images they serve. In most cases, the contents are unremarkable. But several images from the diaper fetish website [http://potbs.wikia.com/wiki/Montgomery_Wetherbed wetherbed.com] contain the login credentials. These images are often reposted in diaper fetish threads on /b/ with the posters unaware of what's in them. You can find this information by opening the files in a text editor such as Wordpad, and searching for "password".		*Broken web pages occasionally append HTML to the end of the images they serve. In most cases, the contents are unremarkable. But several images from the diaper fetish website [http://potbs.wikia.com/wiki/Montgomery_Wetherbed wetherbed.com] contain the login credentials. These images are often reposted in diaper fetish threads on /b/ with the posters unaware of what's in them. You can find this information by opening the files in a text editor such as Wordpad, and searching for "password".
	*Many animated GIFs have been turned into concatenated sequences of JPEG images by a broken thumbnail maker on [[tumblr]]. [http://bbot.org/blog/archives/2012/01/14/fun_and_games_with_unix_pipes/]		*Many animated GIFs have been turned into concatenated sequences of JPEG images by a broken thumbnail maker on [[tumblr]]. [http://bbot.org/blog/archives/2012/01/14/fun_and_games_with_unix_pipes/]

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	===Why does it work?===		===Why does it work?===
	In GIF, JPEG, and PNG files, as well as many other file types, there is information in the file that tells the program reading it how long the file is and/or where to stop. So if you put additional data after the end of the original data, ~~most readers~~ will ~~ignore~~ it.		In GIF, JPEG, and PNG files, as well as many other file types, there is information in the file that tells the program reading it how long the file is and/or where to stop. So if you put additional data after the end of the original data, no one will give a shit about it.

	Many types of compressed archives (7Z, RAR, ZIP) can be distributed as self-extracting files, which are composed of an executable file concatenated with the archive. So these file types are designed to be readable even if they've been appended to another file. For 7Z and RAR, the extractor searches for the "magic number" that indicates the start of the archive data. ZIP files, on the other hand, are read starting from the end of the file.		Many types of compressed archives (7Z, RAR, ZIP) can be distributed as self-extracting files, which are composed of an executable file concatenated with the archive. So these file types are designed to be readable even if they've been appended to another file. For 7Z and RAR, the extractor searches for the "magic number" that indicates the start of the archive data. ZIP files, on the other hand, are read starting from the end of the file.
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	[[Image:Evading_the_4chan_Lithursday_Filter.png\|thumb\|The old technique for posting embedded archives on 4chan. No longer works.]]		[[Image:Evading_the_4chan_Lithursday_Filter.png\|thumb\|The old technique for posting embedded archives on 4chan. No longer works.]]

	Embedded 7z, RAR, and ZIP archives are currently blocked on [[4chan]], giving posters the message "Image file contains embedded archive." At first moot's jpg-rar and sounds filters were particularly easy to circumvent, since he didn't scan the whole file, only the first 64 KB (later updated to 256 KB) and last 64 KB. In those days, all you needed to do to get around it was add padding after the image (for example by using several copies of the image) to push the beginning of the RAR file past the 256 KB threshold.		Embedded 7z, RAR, and ZIP archives are currently blocked on [[4chan]], giving posters the message "Image file contains embedded archive." At first moot's jpg-rar and sounds filters were particularly easy to circumvent, since he didn't scan the whole file, only the first 64 KB (later updated to 256 KB) and last 64 KB. In those days, all you needed to do to get around it was add padding after the image (for example by using several copies of the image) to push the beginning of the RAR file past the 256 KB threshold.

	The filter was updated in November 2012 to include Ogg sound files. Moot's statements on the block are in [http://archive.foolz.us/q/thread/304379/ this /q/ thread]. The 4chan sounds script was quickly rewritten to play files in which "OggS" had been replaced with various strings; moot responded by adding "libVorbis" to the filter. This resulted in the use of yet more ways to circumvent the filter as well as new versions of [https://raw.github.com/dnsev/4cs/master/web/4cs.user.js 4chan sounds] to play the obfuscated files. (You can use [http://userscripts.org/scripts/show/157134 this] to post sounds.)		The filter was updated in November 2012 to include Ogg sound files. Moot's statements on the block are in [http://archive.foolz.us/q/thread/304379/ this /q/ thread]. The 4chan sounds script was quickly rewritten to play files in which "OggS" had been replaced with various strings; moot responded by adding "libVorbis" to the filter. This resulted in the use of yet more ways to circumvent the filter as well as new versions of [https://raw.github.com/dnsev/4cs/master/web/4cs.user.js 4chan sounds] to play the obfuscated files. (You can use [http://userscripts.org/scripts/show/157134 this] to post sounds.)

imported>Lolyunohavgudsoftware: dead link

2016-02-12T00:54:31Z

dead link

← Older revision		Revision as of 00:54, 12 February 2016
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	<gallery>		<gallery>
	Image:Cicada puzzle.jpg\|A JPEG image with a message hidden inside using [http://www.outguess.org/ OutGuess]. Square-shaped steganography artifacts become visible if you apply a paint bucket tool.		Image:Cicada puzzle.jpg\|A JPEG image with a message hidden inside using [http://www.outguess.org/ OutGuess]. Square-shaped steganography artifacts become visible if you apply a paint bucket tool.
	Image:4chan neutronium account.png\|An image created with the [http://www.mediafire.com/?e10jz5zkokvjbc6 4chan Gold File Embedder]. Note the noise in what was originally a smooth background.		Image:4chan neutronium account.png\|An image created with the [http://www.mediafire.com/?e10jz5zkokvjbc6 <s>4chan Gold File Embedder</s>]. Note the noise in what was originally a smooth background.
	Image:4chan sounds steganographic.png\|An steganographic sound image playable with the [https://raw.github.com/dnsev/4cs/master/web/4cs.user.js 4chan Media Player].		Image:4chan sounds steganographic.png\|An steganographic sound image playable with the [https://raw.github.com/dnsev/4cs/master/web/4cs.user.js 4chan Media Player].
	</gallery>		</gallery>