alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY [TW] IPFS File Request Observed"; flow:established,to_server; http.uri; content:"/ipfs/"; fast_pattern; pcre:"/^[a-z0-9]{40,}/Ri"; threshold:type threshold, track by_src, count 10, seconds 30; classtype:misc-activity; sid:2036230; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_04_15, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_15;)