alert tcp $HOME_NET any -> any any (msg:"ET MALWARE Win32/Termite Agent Implant Keep-Alive"; flow:established,to_server; dsize:<600; content:"|00 00 00|"; offset:1; depth:3; content:"|00 00 00|"; distance:1; within:3; content:"|00 00 00|"; distance:1; within:3; content:"|00 00 00|This|20|Client|20|Node|00 00 00|"; distance:1; within:22; fast_pattern; content:"|ff ff ff ff ff ff ff ff|"; distance:0; reference:md5,2820653437d5935d94fcb0c997d6f13c; classtype:trojan-activity; sid:2027084; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2019_03_14, deployment Perimeter, deployment Internal, malware_family Termite, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2019_07_26;)