Re: [Emerging-Sigs] Wirelurker A and B

[James Espinosa <jamesejr () gmail com>]

Thanks, James! I believe there should be a space between the User-Agent|3A|
and globalupdate (at least it appears that way in the report). Can I
suggest the following as a fix?

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC
OSX.Trojan.Wirelurker.AB"; flow:to_server,established;
content:"User-Agent|3A| globalupdate"; fast_pattern:only;
metadata:impact_flag red, policy balanced-ips drop, policy security-ips
drop, service http; reference: url,researchcenter.
paloaltonetworks.com/2014/11/wirelurker-new-era-os-x-ios-malware;
classtype:trojan-activity; sid:10000138; rev:1;)

Thanks,

*james espinosa*
security researcher
847.497.5237 @ jamesejr.com

On Thu, Nov 6, 2014 at 10:47 AM, James Lay <jlay () slave-tothe-box net> wrote:

> May help someone somewhere...a quick search of http://www.ua-tracker.com/
> showed no known UA with globalupdate, so I figured I'd just look for that
> and be done with it.
>
> alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC
> OSX.Trojan.Wirelurker.AB"; flow:to_server,established;
> content:"User-Agent|3A|globalupdate"; fast_pattern:only;
> metadata:impact_flag red, policy balanced-ips drop, policy security-ips
> drop, service http; reference: url,researchcenter.
> paloaltonetworks.com/2014/11/wirelurker-new-era-os-x-ios-malware;
> classtype:trojan-activity; sid:10000138; rev:1;)
>
> Rev C uses encrypted channels, so uh...hope you don't get C.  As always
> fixes are welcome.
>
> James
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