alert tcp $EXTERNAL_NET 1024:65535 -> $HOME_NET any (msg:"ET MALWARE Bandook v1.2 Reporting Socks Proxy Active"; flowbits:isset,BE.Bandook1.2; flow:established,from_server; dsize:7; content:"sockson"; offset:0; reference:url,www.nuclearwintercrew.com; reference:url,research.sunbelt-software.com/threatdisplay.aspx?name=Bandook&threatid=40408; classtype:trojan-activity; sid:2003552; rev:5; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)