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<p style="margin-top:0;margin-bottom:0"><span style="font-size: 11pt;">Hi,</span></p>
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<p style="margin-top:0;margin-bottom:0"><span style="font-size: 11pt;">The detection for the client_body is clumsy in this one since it appears to be dynamic and changes on each request. One request had post body variables that can be sig'ed but it wouldn't
 trigger on other requests. Pcap is available for this one.</span></p>
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<p style="margin-top:0;margin-bottom:0"><span style="font-size: 10pt; font-family: Consolas, Courier, monospace;">alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC Win.Trojan.Fareit/VBKrypt/Neurevt outbound connection"; flow:to_server,established;
 content:"POST"; http_method; content:".php"; fast_pattern:only; http_uri; content:"Content-Type|3A 20|application/x-www-form-urlencoded|0D 0A|"; http_header; content:"Cache-Control|3A 20|no-cache|0D 0A|"; http_header; content:"="; depth:10; http_client_body;
 content:"&"; distance:0; http_client_body; content:!"Connection"; http_header; content:!"Accept"; http_header; content:!"Referer"; http_header; metadata:ruleset community, service http; reference:url,virustotal.com/en/file/6de535e8d4b82e5554a138ec1d6c6b530943ff08d5e04308d695f473e74f9600/analysis/;
 classtype:trojan-activity; sid:9000007; rev:1;)</span><br>
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<p style="margin-top:0;margin-bottom:0"><span style="font-size: 11pt;">Thanks.</span></p>
<p style="margin-top:0;margin-bottom:0"><span style="font-size: 11pt;">YM</span></p>
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