[Snort-sigs] Travnet and PCRat sigs

Joel Esler jesler at ...435...
Thu May 16 11:27:37 EDT 2013


James, these were added today.  Like this:

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC Win.Trojan.Travnet Botnet data upload"; flow:to_server,established; content:"hostid="; http_uri; content:"|26|hostname="; http_uri; content:"|26|hostip="; http_uri; metadata:policy balanced-ips drop, policy security-ips drop, ruleset community, service http; reference:url,www.virustotal.com/en/file/F7E9A1A4FC4766ABD799B517AD70CD5FA234C8ACC10D96CA51ECF9CF227B94E8/analysis/; classtype:trojan-activity; sid:26656; rev:1;)
alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"MALWARE-BACKDOOR Win.Backdoor.PCRat data upload"; flow:to_server,established; content:"PCRatd"; depth:6; metadata:policy balanced-ips drop, policy security-ips drop, ruleset community, service http; reference:url,www.virustotal.com/en/file/669DF9DED24D56997D7B1EA6249BB704226DADA09230DC285AE66CA0C9B7247B/analysis/; classtype:misc-activity; sid:26655; rev:1;)



On May 14, 2013, at 4:29 PM, James Lay <jlay at ...3266...> wrote:

> Travnet botnet:
> 
> alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC 
> Travnet Botnet data upload"; flow:to_server,established; content:"GET"; 
> http_method; content:"hostid="; content:"|26|hostname="; within:16; 
> content:"|26|hostip="; metadata:policy balanced-ips drop, policy 
> security-ips drop, service http; 
> reference:url,http://blogs.mcafee.com/mcafee-labs/travnet-botnet-controls-victims-with-remote-admin-tool; 
> classtype:trojan-activity; sid:10000057; rev:1)
> 
> PCRat:
> 
> alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"MALWARE-BACKDOOR 
> PCRat data upload"; flow:to_server,established; content:"PCRatd"; 
> depth:6; metadata:policy balanced-ips drop, policy security-ips drop 
> reference:url,http://blogs.mcafee.com/mcafee-labs/travnet-botnet-controls-victims-with-remote-admin-tool; 
> classtype:misc-activity; sid:10000058; rev:1)
> 
> Not real cozy with an any/any rule but eh...didn't seem like a 
> different way around this (maybe 1024:65535)?  As usual, comments and 
> anything that optimizes or makes these rules useful/better are always 
> appreciated.  Danke!
> 
> James
> 
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