alert http $HOME_NET any -> any any (msg:"ET MALWARE Tinba CnC Checkin"; flow:established,to_server; urilen:7; http.method; content:"POST"; http.uri; content:"tinba/"; fast_pattern; http.user_agent; content:"Mozilla|2f|5|2e|0|20 28|compatible|3b 20|MSIE|20|10|2e|0|3b 20|Windows|20|NT|20|6|2e|1|3b 20|Trident|2f|6|2e|0|29|"; startswith; http.request_header; header_lowercase; bsize:23; content:"cache-control|3a 20|no-cache"; http.header_names; to_lowercase; content:!"|0d 0a|accept"; content:!"|0d 0a|referer|0d 0a|"; reference:md5,d360ee49950e7da3978379494667260c; classtype:command-and-control; sid:2024441; rev:4; metadata:created_at 2017_07_05, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_27;)