Disk imaging and analysis in Cybersecurity - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a disk image using the dd command.

Cybersecurity

dd if=[1] of=/path/to/image.img bs=4M

Drag options to blanks, or click blank then click option'

A/dev/sda

B/home/user

C/dev/null

D/etc/passwd

Attempts:

3 left

💡 Hint

Common Mistakes

Using a directory path instead of a device file.

Using a file that is not a disk device as input.

The dd command copies data from the input file (if=) to the output file (of=). To create a disk image, the input file should be the disk device, such as /dev/sda.

2fill in blank

medium

Complete the command to verify the integrity of a disk image using SHA256 checksum.

Cybersecurity

sha256sum [1]

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A/dev/sda

B/home/user

Cimage.img

D/etc/passwd

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to checksum the disk device instead of the image file.

Using a directory or unrelated file as input.

The sha256sum command calculates the SHA256 checksum of a file. To verify a disk image, you provide the image file name, such as image.img.

3fill in blank

hard

Fix the error in the command to mount a disk image read-only.

Cybersecurity

mount -o loop,[1] image.img /mnt

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Arw

Bro

Cexec

Dnoexec

Attempts:

3 left

💡 Hint

Common Mistakes

Using rw which allows writing.

Using unrelated mount options.

To mount a disk image in read-only mode, use the ro option. This prevents any changes to the mounted image.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps file names to their sizes if size is greater than 1000 bytes.

Cybersecurity

{filename: [1] for filename, [2] in files.items() if size > 1000}

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Asize

Cname

Dlength

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect variable names like 'name' or 'length'.

Not matching the variable used in the condition with the unpacked value.

The comprehension maps each filename to its size. The loop unpacks filename and size from files.items(). The condition filters sizes greater than 1000.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps uppercase file names to their sizes if size is less than 5000 bytes.

Cybersecurity

{ [1]: [2] for filename, size in files.items() if [3] < 5000 }

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Afilename.upper()

Bsize

Dfilename

Attempts:

3 left

💡 Hint

Common Mistakes

Using the original filename instead of uppercase.

Mixing up the variable names in keys, values, or condition.

The comprehension creates keys by converting filename to uppercase using filename.upper(). The values are the size. The condition filters sizes less than 5000 bytes.