How to create unique mach-o binaries with different file hash on mac

Sometimes you wonder you might want to create several Mach-O executable files on macOS for any fun or test purpose where each Mach-O has different hash such as ( MD5, SHA1, or SHA256 ) from one another. The following script will help you in achieving that.

Pre-requisites:

1. Command-line tools for macOS need to be installed on mac prior to executing the below script.

How to Run:

1. Copy the following code snippet to a file and save it with the name randomMachoGenerator.sh.

2. Run the bash script as sh randomMachoGenerator.sh in Terminal.

3. The following script will compile and execute unique Mach-O binaries inside the directory.

#!/usr/bin/env bash

START=1

END=10

echo 'Generating random Mach-O binaries'

for ((n=$START; n<=$END; n++))

do

 #Generating 12 letter random string 

    STATEMENT=$(dd if=/dev/urandom count=1 2> /dev/null | uuencode -m - | sed -ne 2p | cut -c-12)

    cat > randomMachoGenerator.cpp << EOF

    

#include

using namespace std;

int main() {

    cout << "${STATEMENT}"<< endl;

    return 0;

}

EOF

    g++ randomMachoGenerator.cpp -o Random_macho${n}

    #execute the binaries built in above step

    ./Random_macho${n}

done

The script is also available at : https://github.com/anandmpandit/bash-scripts/blob/master/randomMachoGenerator.sh