In order to exhume the buried signatures of "missing planetary caustics" in KMTNet data, we built KMTNet AnomalyFinder for a systematic planetary anomaly search. This search revealed many low mass-ratio planets, for which the planetary signals had not been noticed before, including one of the lowest mass-ratio microlensing planets to date. In this talk, I will introduce the basic algorithm and results of KMTNet AnomalyFinder, and our plan for obtaining the KMTNet mass-ratio function.