There is a strange exec file named 💪 in /usr/local/bin/ in mac.
I've searched but can't find any information about it with google.
Is this a malware or something?any advice will be appreciated.
Don't worry, to reassure you, you should do this:
cp 💪 testfile
and then upload the testfile to https://www.virustotal.com/ to analyze. Hope you find the file clean.