There's a range of apps and tools that will (attempt to) fix the color balance of color negative scans. NegaFix comes to mind, but there are a couple more, each with its own advocates. You might want to try one or two of these and see if you like the result.
Ultimately, the problem is partly due to a crossover that happens either in the film (this is ECN2 film after all, not C41 that your scanner was designed for), development (eg when putting an ECN2 film through C41 processing) and the scanning process itself. Such are the word of scanning color negative film, in particular the kind that's not really intended for still photography.
Finally...shadows really are pretty blue in reality! Impressionists were on to something when they painted those seemingly put of the box colors. If you watch closely, they're actually there.
All considered, your scan doesn't look half bad at all. I'd personally load it in Photoshop and bump the blue curve in the shadow region a tad, and call it good.