Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Infostealer.Mysayad Checkin 1"; flow:established,to_server; urilen:17; http.method; content:"HEAD"; http.uri; content:"/GlobalUpdate.upt"; fast_pattern; http.header_names; content:!"Referer"; content:!"User-Agent|0d 0a|"; reference:md5,799600122930bbc64b7dac987ea8bb39; reference:url,vinsula.com/2014/07/20/sayad-flying-kitten-infostealer-malware/; classtype:command-and-control; sid:2018889; rev:4; metadata:created_at 2014_08_04, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_25;)