2 of 2 one pipe!

Powershell, 149 148 bytes

-1 byte thanks to @AdmBorkBork. It's cool!

$i=-1
($a=(,1*8+0,1*3)*3+,1*7|%{$_*(1+(Random 9))})|?{++$i;!$_}|%{6..8+1|%{$_,-$_}|%{$a[$i]+=$a[$i+$_]}}
-join($a|%{if(!(++$i%7)){"
"};'{0,3}'-f$_})

Explanation:

$i=-1                       # let $i store -1
($a=                        # let $a is array of random numbers with zero holes
    (,1*8+0,1*3)*3+,1*7|    # the one-dimension array equals
                            # 1 1 1 1 1 1 1
                            # 1 0 1 0 1 0 1
                            # 1 1 1 1 1 1 1
                            # 1 0 1 0 1 0 1
                            # 1 1 1 1 1 1 1
                            # 1 0 1 0 1 0 1
                            # 1 1 1 1 1 1 1
    %{                      # for each element
        $_*(1+(Random 9))   # multiply 0 or 1 element to random digit from 1 to 9
    }                       # now $a stores values like (* is a random digit from 1 to 9)
                            # * * * * * * *
                            # * 0 * 0 * 0 *
                            # * * * * * * *
                            # * 0 * 0 * 0 *
                            # * * * * * * *
                            # * 0 * 0 * 0 *
                            # * * * * * * *
)|?{++$i;!$_                # calc index $i and passthru values == 0 only
}|%{                        # for each zero value cell with index $i
    6..8+1|%{               # offsets for the surrounding cells
                            #  .  .  .
                            #  .  x +1
                            # +6 +7 +8  
        $_,-$_              # add the mirror offsets 
                            # -8 -7 -6
                            # -1  x +1
                            # +6 +7 +8  
    }|%{                    # for each offset 
        $a[$i]+=$a[$i+$_]   # add surrounding values to the cell
    }
}
                            # display the $a
-join(
    $a|%{                   # for each value of $a
        if(!(++$i%7)){"`n"} # line break for each 7 cells
        '{0,3}'-f$_         # formatted value of $a with width = 3 char and align right
    }
)                           # join all values to string