Most software that does such audits is custom. But many auditors use spreadsheets as a reporting tool to show what they found.
I can guess that a new auditor would think there would be off the shelf software read to do all this auditing but as the finance software and industry is not standardized it isn't possible to install some app to grab the needed data and do an audit.
I have been searching for software for my job to assist us in preforming audits on our customer's loans. I need it to handle various types of loans ranging from a fixed rate mortgage to a credit card / auto loan. I need it to be able to take in account that biweekly payments are being made. If you knowledge of any such software that can assist with what I need can you please post the link to where I can find them.