UPD:
Sub find_null_entries()
Dim myRange As Range
Dim c As Range
Dim null_counter As Long
Set myRange = Intersect(Selection, ActiveSheet.UsedRange)
Range("D1").Value = "NULL rows"
For Each c In myRange
If c.Value Like "*NULL*" Then
null_counter = null_counter + 1
Range("D1").Offset(null_counter).Resize(, 2).Value = c.Offset(, -1).Resize(, 2).Value
End If
Next c
End Sub