alert udp $HOME_NET 1234 -> $EXTERNAL_NET 4000 (msg:"ET MALWARE NAZAR EYService Pong response"; id:1; content:"101|3b|0000|3b|"; reference:url,blog.malwarelab.pl/posts/nazar_eyservice_comm; classtype:command-and-control; sid:2030055; rev:4; metadata:attack_target Client_Endpoint, created_at 2020_04_29, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_22;)