Win.Trojan.yty

[Y M via Snort-sigs <snort-sigs () lists snort org>]

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/; 
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/; 
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/; 
classtype:trojan-activity; sid:9000045; rev:1;)


Thanks.

YM

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