You can describe an unfortunate event as an ill wind if someone benefits from it. The expression occurs in the proverb 'It's an ill wind that blows nobody any good'.
But it's an ill wind; I recovered and married one of my nurses from that hospital.
Examples of 'ill wind' in a sentence
ill wind
Who says ill winds blow no good?
Times, Sunday Times (2008)
Overall it is troubling, as an ill wind does no one much good.