Re: Win.Malware.Disttrack

[Y M <snort () outlook com>]

Hi Tyler,


Unfortunately there are no pcaps available. The signatures are based on the information extracted from the article.


Thanks again for taking of these.

________________________________
From: Tyler Montier <tmontier () sourcefire com>
Sent: Friday, February 10, 2017 6:25:49 PM
To: Y M
Cc: snort-sigs
Subject: Re: [Snort-sigs] Win.Malware.Disttrack

Dear Yaser,

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

Do you have any pcaps available?

Sincerely

Tyler Montier
Cisco Talos


On Fri, Feb 10, 2017 at 4:45 AM, Y M <snort () outlook com<mailto:snort () outlook com>> wrote:

Hello,


The below signatures are derived from the article in the reference. There is a hardcoded User-Agent with HTTP 
"parameters". It is not clear whether these parameters are HTTP URL or Body parameters. There is also a mention of a 
specific domain. The rules have been sanity checked only. No pcaps available.


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC Win.Malware.Disttrack variant outbound 
connection"; flow:to_server,established; content:"commandid="; nocase; fast_pattern:only; http_uri; 
content:"User-Agent|3A 20|Mozilla/5.0 (Windows NT 6.3|3B| Trident/7.0|3B| rv:11) like Gecko|0D 0A|"; http_header; 
metadata:ruleset community, service http; 
reference:url,blog.vectranetworks.com/blog/an-analysis-of-the-shamoon-2-malware-attack<http://blog.vectranetworks.com/blog/an-analysis-of-the-shamoon-2-malware-attack>;
 classtype:trojan-activity; sid:1000825; rev:1;)

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC Win.Malware.Disttrack variant outbound 
connection"; flow:to_server,established; content:"commandid="; nocase; fast_pattern:only; http_client_body; 
content:"User-Agent|3A 20|Mozilla/5.0 (Windows NT 6.3|3B| Trident/7.0|3B| rv:11) like Gecko|0D 0A|"; http_header; 
metadata:ruleset community, service http; 
reference:url,blog.vectranetworks.com/blog/an-analysis-of-the-shamoon-2-malware-attack<http://blog.vectranetworks.com/blog/an-analysis-of-the-shamoon-2-malware-attack>;
 classtype:trojan-activity; sid:1000826; rev:1;)

alert udp $HOME_NET any -> any 53 (msg:"BLACKLIST DNS request for known malware domain 
update.winappupdater.com<http://update.winappupdater.com> - Win.Malware.Disttrack"; flow:to_server; 
byte_test:1,!&,0xF8,2; content:"|06|update|0D|winappupdater|03|com|00|"; fast_pattern:only; metadata:ruleset community, 
service dns; 
reference:url,blog.vectranetworks.com/blog/an-analysis-of-the-shamoon-2-malware-attack<http://blog.vectranetworks.com/blog/an-analysis-of-the-shamoon-2-malware-attack>;
 classtype:trojan-activity; sid:1000827; rev:1;)


Thank you.

YM

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http://www.snort.org

Please visit http://blog.snort.org for the latest news about Snort!

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>!