Judging from photograph, painting seems to be in very poor condition, which may be why it lacks Brueghel's typical fine detailing. I find attribution not entirely secure.
There is a print of this subject by Aegidius Sadeler II after a drawing by Jan which is in a private collection (ill. Ertz 2008-10, p.631). This painting is after the drawing, not the print, which might argue for its authenticity. For the print see Hollstein vols. 21-22, #211.