There are only two areas in the world. One is Divine,Satya and the other is Material,Asatya. God and his saints who are beyond Maya alone are 'satya'. Association with them through the complete involvement of the mind and intellect is referred to as 'satsanga', 'divine association'. Anything or anyone else apart from this naturally comes under the three modes of Maya-'Tamasa','Rajasa' and 'Sattvik'. Therefore,association with this area is referred to as 'Kusanga','Material association'.In short,whatever leads to the attachment of the mind and intellect to the divine is "Satsanga",apart from this,everything else is "Kusanga" or 'wrong association'.