alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE TROJ_INJECT.NI Update Request"; flow:established,to_server; dsize:7; content:"F222222"; reference:url,www.trendmicro.com/vinfo/virusencyclo/default5.asp?VName=TROJ_INJECT.NI&VSect=T; classtype:trojan-activity; sid:2009077; rev:3; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)