TFTP Honey Pot Results | Hacker News Reader

TFTP Honey Pot Results

bruceediger.com

93 pointsspeckx40 comments

I love investigating internet background radiation, this is interesting research. I've definitely seen spa504g.cfg (IP Phone) and spa112.cfg (Cisco analog terminal adapter) before; you should actually serve these a proper config file and spin up a disposable SIP server so you can (potentially) call them on the phone, send them a fax or even better ATDT ;)

Though, come to think of it these requests are more likely from credential harvesting bots as most ITSP's provision their CPE with a <macaddr>.cfg or similar.

The 00000000000.cfg stuck out to me too, because that's the default/base config name for polycom phones.

Were the spa504g.cfg pulls coming from the same infosec scanner IPs as everything else or from another source? Curious whether the targeted-looking requests actually separate out from the background noise.

Different source.

I can't be the only one smiling at the mention of file_id.diz

Man, besides being slow; I really miss those days.

I could say I was "into computers" and it meant something. Eternal September ruined it.

Eternal september is more of a concept than a real thing; you had to have seen that by now; almost everything gets ruined when there's no discriminating force.

You just need more esoteric hobbies.

What's hot (or "not yet hot" rather) these days?

May as well ask how to fake authenticity.

Whatever it is, if it's computer-related, it's certainly been overrun by marketing companies.

How about amateur chemistry? Or ham radio?

Yeah, that first part is certainly how it feels.

Thanks for the recommendations and for being taken seriously :) Chemistry is actually something I have considered before, so not so far out there. Thanks!

Outstanding username, btw

I was thinking the other day that the AI bot infested internet we have now is some sort of Eternal December that is even worse than Eternal September. But we never get Christmas.

Relevant: https://news.ycombinator.com/item?id=40484930

I like the prompt injection attempt on the footer:

This reminds me of Slashdot commenters back in the day that tried to include words like "bomb" in their signatures in the hopes of flagging some government system. I am glad that people haven't gotten tired of this sort of tomfoolery and have adapted it for a modern world :)

If I'm not mistaken, it's not a prompt injection attempt, but a training data pollution, in order to prepare for a prompt injection later :) great idea

You're right. Fable 5 did not enjoy this question, but no doubt future models will.

Not sure if it counts but I point many DNS records to 169.254.169.254 so that skiddies will scan the cloud init management interface of their VPS in hopes to draw attention. The result was the skiddies on Amazon AWS and DigitalOcean filtered my domains from their scan target lists.

Clever

That’s a great one.

This is my very favorite all time reply to someone’s report on our bug bounty program: https://imgur.com/a/K9q00A9

Bobby Tables 2.0

I almost got kicked off an early ISP for

     echo “+++ATH0” > ~/.plan

On the shell host they provided, it would reliably hang up lots of modems if someone ‘fingered’ you back in the day. You could do it in busy IRC channels well onto the 2000’s and still see some people drop off line.

Similarly some AV software would “listen” to your IRC comms to check for c&c indicators which meant you could paste it into a channel and a pile of people would disconnect (and you’d be quickly banned).

That only works on modems that don't support the (patented) delay requirement betwixt +++ and a command that Hayes instituted...which was actually quite a large percentage of them by the time v.34 came 'round.

Plus, the string needs to come from the DTE side of things (the user's local PC), not the remote end. So, with finger and IRC channels alike: The hack relies upon the ISP's modem to behave in that way, and not the end-user's.

As a workaround for the latter, a person could encapsulate the string into payloads for ICMP pings. User's machine receives and responds to the ping, and this response packet hangs up their connection.

As a way to weaponize that without things like IRC that leak WAN network addresses, a person could sometimes finger the target's ISP's terminal servers to see which users were logged into which ports and deduce the target's IP address from that. This way, the ping can show up before they even get back onto IRC.

Going even further: Automation.

(Going straight to jail: +++ATHD911)

The non Hayes version was called Time Independent Escape Sequence or TIES, but there were multiple versions of these problems, with the later attacks documented in CVE-1999-1228 where you did have to have some form of echo/ping/icmp to work on a client device.

The earlier issue with finger was due to manufactures having brain dead firmware and using AT commands for voice features in the 14.4 modems etc... I can't seem to find it in the usenet archives that are still around, or at least with current search engine tuning.

First I've heard of ATHD command. Pretty sure my modem would ignore anything after ATH, and if you did ATDT would fail without a dial tone. But obviously, you couldn't send them as one command, but as separate commands. That might work in the same packet, so +++ATH\nATDTxxx but I suspect that you'd probably need a lot of \n as padding to introduce sufficient delay after the ATH.

I think I tested the combined command locally once (not with 911) and it worked. But that was 30-ish years ago and I might be misremembering. :)

Separating the commands and adding some (even small) delay would add a good amount of certainty, though. Absolutely. That's a good method. I think modems expect CR instead of LF as command termination, though, which suggests \r instead of \n.

Either way, for more haunted computer goodness: M2L3 before the dial command. This silences the dialtone and the dialing, and maximizes the loudness of the person that answers.

Such a long time since I 'fingered' someone. Good times!

Most evil is China: https://github.com/ceving/hostile/blob/main/TOP20.md

From the data at your link, China is much less hostile per capita than USA.

50 packets a day is peanuts, I think the lowest ranking service group that I track is printers, and even that's around ~200 unique ips per day.

>peanuts

No kidding. I have a few personal services running on Internet-facing servers and they get hammered 24/7.

One of my projects is written in Rails and I had left the server on the default verbosity during development. It accumulated several GB of systemd/journald logs in a matter of weeks.

50 packets a day sounds like a dream.

Curious if anyone can explain the Shodan packets described here.

It could be a past known vulnerability. Shodan sells CVE data.

UDP related massssscan I believe.

I know tftp is still in wide use, I wonder if there's things out there looking for stuff that's less common like NNTP, finger servers, etc

Any open port will be probed with all variety of protocols.

my guess is the "a" file is a left over from warez days. it was a common scriptkiddie upload test.

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