Snort mailing list archives
Re: Win.Trojan.Fareit signature
From: Tyler Montier <tmontier () sourcefire com>
Date: Mon, 8 Jan 2018 10:57:33 -0500
Yaser, Thanks for your submission. we will review the rules and get back to you when they're finished. Since you have pcaps, can you send them our way? Sincerely, Tyler Montier, Cisco Talos On Thu, Jan 4, 2018 at 1:22 PM, Y M via Snort-sigs < snort-sigs () lists snort org> wrote:
Hi, 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. 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/6de535e8d4b82e5554a138ec1d6c6b 530943ff08d5e04308d695f473e74f9600/analysis/; classtype:trojan-activity; sid:9000007; rev:1;) Thanks. YM _______________________________________________ Snort-sigs mailing list Snort-sigs () lists snort org https://lists.snort.org/mailman/listinfo/snort-sigs Please visit http://blog.snort.org for the latest news about Snort! Please follow these rules: https://snort.org/faq/what-is- the-mailing-list-etiquette Visit the Snort.org to subscribe to the official Snort ruleset, make sure to stay up to date to catch the most <a href=" https://snort.org/downloads/#rule-downloads">emerging threats</a>!
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Current thread:
- Win.Trojan.Fareit signature Y M via Snort-sigs (Jan 04)
- Re: Win.Trojan.Fareit signature Tyler Montier (Jan 08)