alert tcp $HOME_NET any -> $EXTERNAL_NET 1024:65535 (msg:"ET MALWARE Bandook v1.2 Initial Connection and Report"; flowbits:isnotset,BE.Bandook1.2; flow:established,to_server; content:"&first& # "; pcre:"/# \d+d \d+dh \d+m # /iR"; flowbits:set,BE.Bandook1.2; reference:url,www.nuclearwintercrew.com; reference:url,research.sunbelt-software.com/threatdisplay.aspx?name=Bandook&threatid=40408; classtype:trojan-activity; sid:2003549; rev:5; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)