SELF-REPLICATING VIRUS

Simple virus written in bash, the virus searches for other bash scripts and the copy itself into these scripts.

Input

• The script takes no input

Output

• infects the virus code into all the bash scripts under the . directory

How

• the script lists all the directories and files in the current directory
• loop through each one of them
  • if the ith is a directory it recursively calls the infect function again with this directory as the root
  • if the ith is a file
    • checks if the file is a bash script
      • inject the code into the other bash script

Notes

• the code doesn't do anything malicious, it just infects itself into other bash scripts.
• but by adding a malicious code inside it it will infect all the bash scripts with the same malicious code
• you can test the script in an empty directory by placing some unimportant scripts in side it.