alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING Bit.do Shortened Link Request to EXE"; flow:established,to_client; flowbits:isset,ET.bit.do.shortener; http.stat_code; content:"30"; depth:2; http.location; content:".exe"; isdataat:!1,relative; classtype:misc-activity; sid:2029550; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_02_28, deployment Perimeter, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_02_28;)