alert http $HOME_NET any -> $EXTERNAL_NET 1024: (msg:"ET MALWARE Suspected Muggle Stealer Activity M2"; flow:established,to_server; http.host; pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/"; http.uri; content:"/upload/"; startswith; pcre:"/^[a-zA-Z0-9]{5,12}\//R"; content:"DiskInfoPost"; fast_pattern; distance:0; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:md5,c8ed60d1f24a7119612cd5bde0ddc1e1; reference:url,twitter.com/suyog41/status/1638865731550085120; classtype:trojan-activity; sid:2044769; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_03_27, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_26; target:src_ip;)