One view is through its effect on demand. It shocked demand downwards, and thus lowering output, employment, and income. This was demonstrated by Josh Bivens and Hedi Shierholz study in Ch.4 “The Great Recession’s impact on Jobs, Wages, and Income,” in Oxford Handbook of “The Political Economy of Financial Crises,” 2013.
You may want to examine some supply side phenomena as well such as how deviation from rational expectation or efficient market hypothesis about assets prices impacts the economy thru misperceptions etc.