alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Wacapew CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/?email="; startswith; fast_pattern; content:"&username="; distance:0; content:"&step=1"; endswith; http.header_names; content:"|0d 0a|Host|0d 0a|Accept|0d 0a 0d 0a|"; bsize:18; reference:md5,ef1c77617df492026014607785d8fabf; classtype:trojan-activity; sid:2037776; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_07_15, deployment Perimeter, malware_family Win32_Wacapew, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_07_15, reviewed_at 2024_12_24;)