alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MSIL/Autorun.AD Checkin"; flow:established,to_server; urilen:14; http.method; content:"GET"; http.uri; content:"/loglogin.html"; fast_pattern; http.header_names; content:"|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; startswith; http.connection; content:"Keep-Alive"; bsize:10; reference:md5,3d652375fd511878f410fb1048e47f83; reference:url,www.microsoft.com/security/portal/threat/encyclopedia/entry.aspx?Name=TrojanDownloader%3AMSIL/Autorun.AD; reference:md5,3d652375fd511878f410fb1048e47f83; classtype:command-and-control; sid:2021143; rev:6; metadata:created_at 2015_05_23, malware_family MSIL_Autorun_AD, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_01;)