alert tcp $HOME_NET any -> $EXTERNAL_NET 25 (msg:"BLEEDING-EDGE VIRUS Bagle.fj(CME-328) SMTP Outbound"; flow:to_server,established; content:"UEsDBAoAA"; content:"AAA"; distance:24; content:"AAA"; distance:2; content:"AAA"; distance:29; reference:url,cme.mitre.org/data/list.html#328; classtype:trojan-activity; sid:2002798; rev:4;)