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Doxx/Darkflare: DarkFlare TCPoCDN (TCP over CDN)

(github.com)
81 points josephscott | 8 comments | 20 Nov 24 22:49 UTC | HN request time: 0.439s | source | bottom
1. tomsonj ◴[21 Nov 24 02:46 UTC] No.42200584[source]▶
chisel is a similar tool in this space https://github.com/jpillora/chisel

I don’t get why headers and requests need to be spoofed if all traffic is over https?

replies(4): >>42200669 #>>42200828 #>>42201273 #>>42201386 #
2. Titan2189 ◴[21 Nov 24 03:01 UTC] No.42200669[source]▶
> I don’t get why headers and requests need to be spoofed if all traffic is over https?

https://en.wikipedia.org/wiki/Deep_packet_inspection

replies(1): >>42200815 #
3. fragmede ◴[21 Nov 24 03:28 UTC] No.42200815[source]▶
how are they looking inside the packet if it's encrypted?
replies(1): >>42200924 #
4. mhio ◴[21 Nov 24 03:30 UTC] No.42200828[source]▶
The headers are seen by the monster-in-the-middle CDN.

It's obfuscation at best. I'm not sure the encrypted traffic will look particularly php-ish for example. Compressed formats might look vaguely passable.

I can't see any stenography code or libraries in the repo.

5. sodality2 ◴[21 Nov 24 03:51 UTC] No.42200924{3}[source]▶
DPI doesn't have to decrypt it to make certain guesses about its content. For example, timing information, packet sizes, routing info, etc could lead you to believe it's certain kinds of things (SSH, VPN, etc).
6. coretx ◴[21 Nov 24 04:58 UTC] No.42201273[source]▶
Because SNI. Also, State (sponsored) Actors are certificate authorities. HTTPS is the biggest scam in internet history. https://en.wikipedia.org/wiki/Server_Name_Indication
replies(1): >>42201851 #
7. duskwuff ◴[21 Nov 24 05:22 UTC] No.42201386[source]▶
> I don’t get why headers and requests need to be spoofed if all traffic is over https?

Because the traffic is to a CDN endpoint (like Cloudflare) which expects it to be a HTTP message.

8. astrange ◴[21 Nov 24 07:04 UTC] No.42201851[source]▶
This certainly was an issue but it's solved by ECH/DoH. As long as they aren't blocked on your network anyway.

> Also, State (sponsored) Actors are certificate authorities.

To generate a fake certificate as a CA you have to either put it in the Certificate Transparency log, in which case everyone will notice, or don't, in which case browsers will notice (they know what top sites' certificates are supposed to look like) and your CA will get shut down.