Bftools: used to decrypt picture information
The calculated CRC is incorrect, then the CRC when running the script is the original correct CRC valueĩ. If the flag is not obtained after modifying the CRC, it is a height or width problem, because the change in height and width caused The 8 bytes after the last line of the CRC, the first four are the width, the last four are the height (the first eight digits of the second line in hexadecimal) CRC error caused by height error, the height needs to be modified. TweakPNG: The file header is normal but the file cannot be opened.
Open the obtained _is file with notepad++ħ, python script to process (picture steganography LSB)Ĩ. wbstego4 tool (least significant bit): for. Zsteg needs to be installed online (Steganography) gem install zstegĭetect LSB steganography zsteg xxx.png/bmpĥ. Used to filter the least significant bits Analyse->Data Extract->3.primary colors: RGBĤ. Modify the opening method: bin/javaw.exe Modify the registry: HKEY_CLASSES_ROOT\Applications\javaw.exe\shell\open\command and add -jar (space required) Stegsolve (Stegsolve): The information of the two pictures is basically the same Exif: open properties (give prompt) Windowsģ. Firework: View steganographic image filesĢ.
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