alert udp $HOME_NET any -> $EXTERNAL_NET 8000 (msg:"ET MALWARE Win32/Dostre CnC Activity"; content:"|af 7d a7 38 eb f9 f7 47|"; depth:8; fast_pattern; content:"|00|"; distance:4; within:1; content:"|10 00|"; distance:1; within:2; threshold:type limit, track by_src, count 1, seconds 60; reference:url,www.fortinet.com/blog/threat-research/chinese-targeted-trojan-analysis.html; classtype:command-and-control; sid:2027892; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_08_15, deployment Perimeter, malware_family Win32_Dostre, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2019_08_19;)