Re: Orbit Downloader DoS

[Nick Randolph <drandolph () sourcefire com>]

I added rules to detect other stages of the DDoS update.

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC
Orbit Downloader denial of service update attempt";
flow:to_server,established; content:"/update/ido.ipl"; fast_pattern:only;
http_uri; metadata:impact_flag red, policy balanced-ips drop, policy
security-ips drop, ruleset community, service http; reference:url,
www.welivesecurity.com/2013/08/21/orbital-decay-the-dark-side-of-a-popular-file-downloading-tool;
classtype:trojan-activity; sid:27726; rev:1;)
alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC
Orbit Downloader denial of service update attempt";
flow:to_server,established; content:"/update/myinfo.php";
fast_pattern:only; http_uri; metadata:impact_flag red, policy balanced-ips
drop, policy security-ips drop, ruleset community, service http;
reference:url,
www.welivesecurity.com/2013/08/21/orbital-decay-the-dark-side-of-a-popular-file-downloading-tool;
classtype:trojan-activity; sid:27727; rev:1;)
alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC
Orbit Downloader denial of service update attempt";
flow:to_server,established; content:"/update/param.php?";
fast_pattern:only; http_uri; metadata:impact_flag red, policy balanced-ips
drop, policy security-ips drop, ruleset community, service http;
reference:url,
www.welivesecurity.com/2013/08/21/orbital-decay-the-dark-side-of-a-popular-file-downloading-tool;
classtype:trojan-activity; sid:27728; rev:1;)

Thanks James



On Thu, Aug 22, 2013 at 5:27 PM, James Lay <jlay () slave-tothe-box net> wrote:

> That's kind of sad....thought this software had been a round a while
> (never used it..glad now)
>
> alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"PUA-OTHER
> Orbit Downloader Silent DoS DLL download"; flow:to_server, established;
> content:"/update/ido.ipl"; http_uri; fast_pattern:only; metadata:policy
> balanced-ips drop, policy security-ips drop, service http;
> reference:url,
> www.welivesecurity.com/2013/08/21/orbital-decay-the-dark-side-of-a-popular-file-downloading-tool
> ;
> classtype:unknown; sid:10000090; rev:1;)
>
> Anything to make this better?  Maybe add header check for "orbit" in
> the host or...something else?  Thanks all.
>
> James
>
>
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-- 

Nick Randolph
Research Engineer
Sourcefire, Inc.
nrandolph () sourcefire com
Sourcefire.com <http://www.sourcefire.com/>

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