This piece of data is captured via USB port, look for the flag transferred through it.

You can use Wireshark to read the file pcapng. Download file pcap here: http://material.wargame.whitehat.vn/challenges/3/For001_61fb3e6d8aa22c75362af02e798331bbf5b73a4b.zip

Submit WhiteHat{sha1(flag)} Example: flag = Hello World sha1("Hello World") = 0a4d55a8d778e5022fab701977c5d840bbc486d0 submit: WhiteHat{0a4d55a8d778e5022fab701977c5d840bbc486d0} (all hash characters in lowercase)