alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MEREDROP/micr0s0fts.cn Related Checkin"; flow:established,to_server; http.method; content:"POST"; nocase; http.uri; content:"/update.asp"; fast_pattern; http.request_body; content:"ver="; startswith; content:"|00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00|"; classtype:command-and-control; sid:2008891; rev:8; metadata:created_at 2010_07_30, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_05;)