alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Qbot Payload Request (2023-03-21) M8"; flow:established,to_server; urilen:<21; http.method; content:"GET"; http.uri; content:".php?8"; fast_pattern; isdataat:!5,relative; content:!"="; pcre:"/^\/(?P<base_dir>[a-z]{2,4})\/(?P=base_dir)\.php\?8[0-9]{4}$/"; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; classtype:trojan-activity; sid:2044731; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_03_22, deployment Perimeter, deployment SSLDecrypt, malware_family Qbot, performance_impact Moderate, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_24; target:src_ip;)