Uptick in RFC2397 Data URL Scheme Usage Detected (30419) ?

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MCmgt
L2 Linker

Uptick in RFC2397 Data URL Scheme Usage Detected (30419) ?

Before I go on a wild goose chase, has anyone seen an increase in threat 30419 (RFC2397 Data URL Scheme Usage Detected)?

 

It seems like these things trip for a while until PA figures out someone's using something novel in a new App. A new application sig comes out and the alerts go away...


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MCmgt
L2 Linker

This particular instance was a TTF (TrueType Font) file, and that the purpose of the javascript containing it looked to be css/style/ad delivery using JWPLAYER.

 

Advertising...

 

YMMV.

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ulti
L3 Networker

thank goodness - its not just me. yes, we've seen a huge increase in these and wasn't sure if we should negate these in the policy or if Palo's threat team jacked with the settings in a recent db update. (known to happen)

 

ulti
L3 Networker

anyone have thoughts on this? seems noisy for us. Can't tell if Palo changed it in threat db or if there's just a huge increase of it on net.

MCmgt
L2 Linker

I opened a case (00389881) yesterday. They've heard rumblings from customers but hadn't received any pcaps yet.

 

By chance, I stumbled across someone tripping the sig and called them. They got red-faced when I asked them what they had just done...visited okmagazine.com. Sure enough, I was able to reproduce it and support has a pcap to look at.

ulti
L3 Networker

let us know what the outcome is, we're getting these daily whereas we've never had them prior to about a month or so ago

MCmgt
L2 Linker

This particular instance was a TTF (TrueType Font) file, and that the purpose of the javascript containing it looked to be css/style/ad delivery using JWPLAYER.

 

Advertising...

 

YMMV.

View solution in original post

ulti
L3 Networker

Did you mark it as exception and allow or are you still alerting on it?

jambulo
L4 Transporter

We've been getting a lot of hits on this Threat ID as well.  I think if anything, this ID should be set to Informational or Low.

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