This would depend on the type of financial analyst. Please clarify which department/function you are referring to.
Assuming you are referring to investment banking, equity research, private equity-type functions, the answer is, of course, Excel. All of our financial modeling training courses are done in Excel.
If referring to statistical related quant jobs (black-box coding), then it varies - from stats software like MatLab to Monte Carlo like Crystal Ball or @Risk, etc
If referring to more internal finance departments within finance that are more geared towards accounting and operations, then it would be more along the lines of SAP or other institutional accounting software.