[Snort-sigs] [Emerging-Sigs] Wirelurker A and B

rmkml rmkml at ...174...
Thu Nov 6 15:16:54 EST 2014


Thx James and James ;)

Maybe add http_header please ?

Regards
@Rmkml


On Thu, 6 Nov 2014, James Espinosa wrote:

> 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 at ...3266...> 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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