A German engineering firm suddenly lost contact with hundreds of its building automation system (BAS) devices after a rare cyberattack locked the company out of the BAS it had constructed for an office building client. The attack was no anomaly: Limes Security has been getting reports of similar types of attacks on BAS systems that run on KNX. The company plans to present the case – which the company calls KNXlock – at the S4x22 ICS security conference next month in Miami.”]