# Demo: UPX

Choose a file that contains strings, and run:

* upx -o \<packedFileName> \<fileToPack>
* strings \<fileToPack> | wc
* strings \<packedFileName> | wc

What do you see?

```
$ strings test_malware.exe
# full words and potential error messages

$ upx -o packed test_malware.exe

$ strings packed
# no human-readable strings

$ strings test_malware.exe | wc
700 1978 15062

$ strings packed | wc
659 716 4029
```


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