alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Protux.B Download Update"; flow:established,to_server; http.user_agent; content:"Mozilla/4.2.20 (compatible|3B| MSIE 5.0.2|3B| Win32|29|"; endswith; reference:md5,0cab2e1959a2c9eaa3aed1f2e556bf17; classtype:trojan-activity; sid:2014361; rev:4; metadata:created_at 2012_03_10, malware_family Win32_Protux_B, signature_severity Major, updated_at 2024_02_23;)