1.使用rar2john找到md5
2.基于字典
hashcat -a 0 -m 12500 /root/Desktop/md5.txt /usr/share/wordlists/weakpass.txt
3.基于暴力的6-8位混合小写字母和数字：
hashcat -a 3 -m 12500 /root/Desktop/md5numword.txt --increment --increment-min 6 --increment-max 8
优化
https://wps2015.org/drops/drops/GPU%E7%A0%B4%E8%A7%A3%E7%A5%9E%E5%99%A8Hashcat%E4%BD%BF%E7%94%A8%E7%AE%80%E4%BB%8B.html