alert udp $HOME_NET any -> $EXTERNAL_NET 53 (msg:"ET MALWARE Charming Kitten APT Related DNS Activity"; content:"|f1 00|"; offset:4; depth:2; content:!"|00 00 00 00 00 00|"; distance:0; within:6; content:"|51 00 00 02|"; distance:6; within:4; threshold:type both,track by_src, count 10, seconds 30; reference:md5,a3d5d54e2c0551e84a3727353bca7496; reference:md5,e66169d7f789b7d5c3696a3b291c41fb; reference:md5,50e3da586b1003415a841c946e21b246; reference:url,www.team-cymru.com/post/apt35-exploitation-activities-continue-as-of-november-2022; classtype:trojan-activity; sid:2042974; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_12_20, deployment Perimeter, malware_family TA453, malware_family CharmingKitten, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_12_20, reviewed_at 2024_05_07; target:src_ip;)