alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Fake Software Download Redirect Leading to Malware M3"; flow:established,to_server; http.request_line; content:"GET|20|/?s="; startswith; fast_pattern; content:"&q="; distance:0; content:"&hmac="; distance:0; reference:url,news.sophos.com/en-us/2021/09/01/fake-pirated-software-sites-serve-up-malware-droppers-as-a-service/; classtype:trojan-activity; sid:2033961; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_09_16, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_16;)