Can banks and ATM makers trust their own staff? Just last week, the UP Special Task Force arrested bank staff, who took screenshots of customer details and shared it on WhatsApp. Recently, public sector bank employees siphoned off Rs 173 crore by approving loans to fake companies.

ATM service providers like Scientific Security Management Services (SSMS) and Safeguard Writers' Co have had their share of employees arrested for switching cassettes, pilfering cash or rewiring ATM hardware.

To combat this, the BFSI (banking, financial services, insurance) sector has stepped up its use of predictive analysis in detecting insider fraud. Internal software monitors employee behaviour -- such as web browsing, average time spent to load ATMs at ATM provider AGS Technology.