A device may receive data from a first endpoint device. The device may identify a network protocol. The network protocol may be associated with receiving the data. The device may identify a format. The format may be associated with encoding textual information in the data. The device may determine, based on the format and the network protocol, text in the data. The device may determine whether the text includes a reference from a plurality of references. The plurality of references may identify addresses associated with malicious devices. The device may selectively forward the data to a second endpoint device based on determining whether the text includes the reference.