alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TLD4 Purple Haze Variant Initial CnC Request for Ad Servers"; flow:established,to_server; content:"trf?q="; http_uri; content:"&edv="; http_uri; content:"&o="; http_uri; content:"&kp="; http_uri; content:"&tk="; http_uri; content:"&fk="; http_uri; content:"&ks="; http_uri; reference:url,contagiodump.blogspot.com/2012/02/purple-haze-bootkit.html; classtype:command-and-control; sid:2014208; rev:2; metadata:created_at 2012_02_07, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)