alert udp $EXTERNAL_NET any -> $HOME_NET 69 (msg:"ET SCAN Cisco Torch TFTP Scan"; content:"|52 61 6E 64 30 6D 53 54 52 49 4E 47 00 6E 65 74 61 73 63 69 69|"; offset:2; depth:21; reference:url,www.hackingexposedcisco.com/?link=tools; reference:url,www.securiteam.com/tools/5EP0F1FEUA.html; classtype:attempted-recon; sid:2008414; rev:2; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)