alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE zgRAT Activity"; flow:established,to_server; flowbits:isset,ET.zgRAT; content:"|01 00 00 00 1f 8b 08 00 00 00 00 00 04 00 33 04 00 b7 ef dc 83 01 00 00 00|"; dsize:25; reference:md5,b18a7e266eee1977ef3a145369589d5c; classtype:command-and-control; sid:2033108; rev:2; metadata:attack_target Client_Endpoint, created_at 2021_05_05, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_05_10;)