alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED ErbiumStealer Variant CnC Activity (getstub)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?"; content:"method=getstub"; fast_pattern; content:"bid="; content:"tag="; http.header_names; content:!"Referer"; reference:md5,e1826f107e517c0cb9a9b02f74cb94f2; classtype:trojan-activity; sid:2038723; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_09_01, deployment Perimeter, former_category MALWARE, malware_family Erbium, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_17, reviewed_at 2024_09_17;)