alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP Win32/OfferCore Checkin M1"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/o"; http.user_agent; content:"Mozilla/4.0|20 28|compatible|3b 20|Win32|3b 20|WinHttp.WinHttpRequest"; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; http.request_body; content:"|7b 22|prv|22 3a 20 22|"; fast_pattern; startswith; reference:md5,60ba45cff3dbaaed74d7d63886c8957f; classtype:trojan-activity; sid:2053280; rev:1; metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_06_06, deployment Perimeter, deployment SSLDecrypt, malware_family Offercore, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_06_06; target:src_ip;)