alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING HTTP GET Request XOR e4"; flow:established,to_server; content:"|a3 a1 b0 c4 cb|"; startswith; fast_pattern; content:"|c4 ac b0 b0 cb|"; distance:0; classtype:misc-activity; sid:2038474; rev:1; metadata:attack_target Client_and_Server, created_at 2022_08_09, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_08_09;)