alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Possible SQUIRRELWAFFLE Server Response"; flow:established,to_client; http.stat_code; content:"200"; http.content_type; content:"text/html|3b 20|charset=UTF-8"; bsize:24; file.data; content:"|0d 0d 0d 09 09 09 0a 0a 0a|"; startswith; fast_pattern; content:"|0a 0a 0a 09 09 09 0d 0d 0d|"; endswith; classtype:command-and-control; sid:2033984; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_09_17, deployment Perimeter, malware_family SQUIRRELWAFFLE, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_22;)