alert http $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET DELETED Sality Variant Checkin Activity"; flow:established,to_server; content:"/sm.php?pizda"; http_uri; nocase; reference:url,www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Virus%3AWin32%2FSality.AU; reference:md5,f39d0a669ad98b95370a4f525d7d79ec; classtype:trojan-activity; sid:2011335; rev:3; metadata:created_at 2010_09_28, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)