alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W32/TinyZBot Checkin (Operation Cleaver)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/checkupdate.asmx"; fast_pattern; http.header; content:"SOAPAction|3a 20 22|http|3a|//tempuri.org/GetServerTime|22 0d 0a|"; http.request_body; content:"GetServerTime xmlns=|22|http|3a|//tempuri.org/"; http.header_names; content:!"|0d 0a|Accept"; content:!"Referer|0d 0a|"; reference:md5,68cfc418c72b58b770bdccf19805703e; reference:url,www0.cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf; classtype:command-and-control; sid:2019942; rev:5; metadata:created_at 2014_12_16, signature_severity Major, updated_at 2020_09_28;)