[Snort-sigs] Win.Trojan.yty

Phillip Lee phillile at sourcefire.com
Wed Mar 14 14:46:13 EDT 2018


Yaser,

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

Regards,
Phil Lee
Cisco Talos

> On Mar 14, 2018, at 2:38 PM, Y M via Snort-sigs <snort-sigs at lists.snort.org> wrote:
> 
> Hi 
> 
> The below rules are based of the research posted at the resource link. Unfortunately, no pcaps available.
> 
> alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC Win.Trojan.yty initial outbound connection"; flow:to_server,established; content:"POST"; http_method; content:"score=Name|3A|"; fast_pattern:only; http_client_body; content:">Caption|3A|"; http_client_body; content:">SerialNumber|3A|"; http_client_body; content:">VM|3A|"; http_client_body; metadata:ruleset community, service http; reference:url,www.arbornetworks.com/blog/asert/donot-team-leverages-new-modular-malware-framework-south-asia/ <http://www.arbornetworks.com/blog/asert/donot-team-leverages-new-modular-malware-framework-south-asia/>; classtype:trojan-activity; sid:9000043; rev:1;)
> 
> alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC Win.Trojan.yty retrieve modules outbound connection"; flow:to_server,established; content:"POST"; http_method; content:"pc="; http_client_body; content:"&whi="; http_client_body; fast_pattern:only; content:"&pc_data=<div class=|27|pcinfo|27|>"; http_client_body; metadata:ruleset community, service http; reference:url,www.arbornetworks.com/blog/asert/donot-team-leverages-new-modular-malware-framework-south-asia/ <http://www.arbornetworks.com/blog/asert/donot-team-leverages-new-modular-malware-framework-south-asia/>; classtype:trojan-activity; sid:9000044; rev:1;)
> 
> alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC Win.Trojan.yty exfiltration outbound connection"; flow:to_server,established; content:"POST"; http_method; content:"/file_upload?"; http_uri; fast_pattern:only; content:"status="; http_uri; content:"&path="; http_uri; content:"&pc="; http_uri; content:"&type="; http_uri; content:"&fname="; http_uri; content:"&cnumber="; http_uri; content:"&orname="; http_uri; content:"&ofid="; http_uri; metadata:ruleset community, service http; reference:url,www.arbornetworks.com/blog/asert/donot-team-leverages-new-modular-malware-framework-south-asia/ <http://www.arbornetworks.com/blog/asert/donot-team-leverages-new-modular-malware-framework-south-asia/>; classtype:trojan-activity; sid:9000045; rev:1;)
> 
> Thanks.
> YM
> 
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