alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Onliner Mailer Module Communicating with CnC"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php?&1001="; fast_pattern; content:"&req="; distance:1; within:5; content:"&"; endswith; http.protocol; content:"HTTP/1.0"; http.header_names; content:"Accept-Charset"; content:!"Referer"; content:!"Cache"; reference:url,www.blueliv.com/blog/research/analysis-spam-distribution-botnet-onliner-spambot/; classtype:command-and-control; sid:2027810; rev:6; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_08_06, deployment Perimeter, malware_family Onliner, performance_impact Low, confidence High, signature_severity Major, tag SpamBot, updated_at 2023_03_24;)