Did your shields go down or did they stay up and your hull just drop like a brick?

I had an encounter the other day where a Cruiser of some sorts did the later to me. I was down to 1% and dropping after about 45ish seconds woth full shields intact.
I escaped to BC but soon became debris as the DoT killed me.

I was thinking plasma weapons, EWP, TB maybe something that one can set in for a duration. Most likely a DOff is involved.

It was very effective none the less.