[Snort-sigs] Win.Trojan.NeutrinoBot

Tyler Montier tmontier at ...435...
Thu Mar 9 11:25:50 EST 2017


Yaser,

Thank you for your submission. We will review the rules and get back to you
when they're finished.

Sincerely,

Tyler Montier
Cisco Talos

On Thu, Mar 9, 2017 at 1:49 AM, Y M <snort at ...3751...> wrote:

> Hello,
>
> The below rules were derived from the reference article. Reviewing the
> existing signature sid:32670, it may hit on the initial outbound
> connection. Subsequent traffic may not trigger the rule given the HTTP
> headers differences. No pcap is available for this one. If these rules seem
> redundant, please ignore them.
>
> alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC
> Win.Trojan.NeutrinoBot initial outbound connection";
> flow:to_server,established; content:"POST"; http_method;
> content:"/tasks.php"; fast_pattern:only; http_uri; content:"Cookie|3A
> 20|auth="; http_header; content:"ZW50ZXI="; http_client_body;
> content:!"Connection"; http_header; content:!"Accept"; http_header;
> metadata:ruleset community, service http; reference:url,blog.
> malwarebytes.com/threat-analysis/2017/02/new-neutrino-
> bot-comes-in-a-protective-loader/; reference:url,www.virustotal.
> com/en/file/45abc50e837a3e0c4df842fe8c3aa54e103d690d67f89d78059878bd3acc
> 67ab/analysis/; classtype:trojan-activity; sid:1000873; rev:1;)
>
> alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"MALWARE-CNC
> Win.Trojan.NeutrinoBot success inbound connection";
> flow:to_client,established; content:"404"; http_stat_code; file_data;
> content:"<!---c3VjY2Vzcw==--->"; metadata:ruleset community, service
> http; reference:url,blog.malwarebytes.com/threat-
> analysis/2017/02/new-neutrino-bot-comes-in-a-protective-loader/;
> reference:url,www.virustotal.com/en/file/45abc50e837a3e0c4df842fe8c3aa5
> 4e103d690d67f89d78059878bd3acc67ab/analysis/; classtype:trojan-activity;
> sid:1000874; rev:1;)
>
> alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC
> Win.Trojan.NeutrinoBot outbound connection"; flow:to_server,established;
> content:"POST"; http_method; content:"/tasks.php"; fast_pattern:only;
> http_uri; content:"Cookie|3A 20|auth="; http_header; content:"Connection|3A
> 20|close|0D 0A|"; http_header; content:"|20|form-data|3B|name=|22|fname|22|";
> content:"|20|form-data|3B 20|name=|22|data|22|"; content:!"Accept";
> http_header; content:!"Referer"; http_header; metadata:ruleset community,
> service http; reference:url,blog.malwarebytes.com/threat-
> analysis/2017/02/new-neutrino-bot-comes-in-a-protective-loader/;
> reference:url,www.virustotal.com/en/file/45abc50e837a3e0c4df842fe8c3aa5
> 4e103d690d67f89d78059878bd3acc67ab/analysis/; classtype:trojan-activity;
> sid:1000875; rev:1;)
>
> Thanks.
> YM
>
>
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