Applying multi-level clustering at scale to unlabeled data for anomaly detection and security

Abstract

Methods, systems, and computer program products for applying multi-level clustering at scale to unlabeled data for anomaly detection and security are disclosed. A computer-implemented method may include receiving transactional data associated with a plurality of user accounts, analyzing the transactional data of the accounts in view of a clustering model, associating each of the accounts with one of multiple peer groups from the clustering model, detecting anomalous account behavior in a peer group in view of a scatteredness score computed for each account in the peer group where each scatteredness score is computed based on a neighborhood of accounts in the peer group determined for each respective account of the peer group, and creating a report comprising account and scatteredness score information for one or more of the accounts in the peer group associated with detected anomalous account behavior.