Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MuddyWater Payload - CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?ac="; fast_pattern; content:"&n="; distance:1; within:3; content:"|3a|"; distance:0; content:"|3a|"; distance:0; content:"-bit|29|"; distance:0; http.accept; content:"*/*"; bsize:3; http.accept_lang; content:"en-us"; bsize:5; classtype:command-and-control; sid:2029039; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_11_21, deployment Perimeter, malware_family MuddyWater, performance_impact Low, confidence High, signature_severity Major, updated_at 2019_11_21;)