Several graphics files were transmitted via e-mail from an unknown source to a s

Question

Several graphics files were transmitted via e-mail from an unknown source to a suspect in an ongoing investigation. The lead investigator gives you these graphics files and tells you that at least four messages should be embedded in them. Use your problem-solving and brainstorming dills to determine a procedure to follow. Write a short report outlining what to do. A drive you're investigating contains several password-protected files and other files with headers that don't match the extentions and discuss techniques you can apply to recover passwords from the protected files.

Explanation / Answer

9.2

to decode the hidden messages in the graphic files open the files with images and files with notepad and check for any valid/known sentences in the images. Most of the attackerrs store some regular information inside the binary text in the images. If a user opens it with notepad++ or any other editor and search for some valid words you may find some hidden messages. Also we will check the image attributes as information is stolen in the attributes as well.

9.3

In this case the extension of the file might be changed so that it becomes unreadable. we will try to figure out the correct extension of the file and will then try to open it. To crack the password we can use brute force method to detect the sequence.

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