I need help of MCU

[HanalogInstruments]

Hi,

How can i automate add the MCU for jpeg full image have wrong alligment?

Best regards,

[albmac]

Unfortunately it is all done by eye right now, as explained in my tutorial.
I suppose one could take the thumbnail image, if uncorrupted, and use it as a reference for alignment.
But even in this case it would be a very difficult task, as MCU's can be color shifted in addition to position shifted.

[HanalogInstruments]

Hi,

These file encrypted 153605 bytes from ransomware so when i cut from offset 153605 of encrypted and paste it to the last FFDA+12 Bytes the alligment not correct so i have plan to made a automate process to correct the MCU and color of batch JPEG

Sample:

https://drive.google.com/drive/folders/1e_C2lzBIEFfbZkR4vvr9_Nkdul1P0C-E?usp=sharing

when patch the corrupt jpeg to reference file we have 3 issue:

• wrong alligment like the image.jpg
• the bottom have non data because the first data encrypted so image become gray so how we remove it by mcu
• the color maybe wrong

If i remove byte from SOS of image the color when wrong and image fix alligment bit remove MCU is better

[albmac]

You should not cut data arbitrarily; it's better to decompile the image and remove MCU's from the text file.
Still I don't know how all this could be automated; the eye and brain tell you where to cut.

[HanalogInstruments]

How can i remove MCU by manual to fix this file? Vào Th 3, 7 thg 2, 2023 vào lúc 05:50 albmac ***@***.***> đã viết:

…

You should not cut data arbitrarily; it's better to decompile the image and remove MCU's from the text file. Still I don't know how all this could be automated; the eye and brain tell you where to cut. — Reply to this email directly, view it on GitHub <#1 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AX6NRH6WVTUK7RPEMOSFX3LWWF537ANCNFSM6AAAAAAURK2AAM> . You are receiving this because you authored the thread.Message ID: ***@***.***>

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[albmac]

As written in my tutorial, first decompile your image:
>jpeg-decomp -decode -fin image.jpg -fout image.txt
then load the image in JPEGsnoop and locate the MCU that you want to remove.
Go to the text file and remove or comment it.
Create a new image from the modified text file:
>jpeg-compiler -encode -fin image.txt -fout image.1.jpg