Humiliating IIS servers for fun and jail time (mll.sh)
340 points by denysvitali 18 hours ago
naturalmovement 17 hours ago
I front all my honeypots with the IIS landing page precisely because it attracts black hat jagoffs.
Nothing makes me happier than knowing I've wasted hours of their time chasing their own tails.
p1necone 17 hours ago
Why stop there? Front the honeypot with a real IIS server, build a matryoshka doll of honeypots and see how far people get.
DaSHacka 14 hours ago
Unless you're honeypotting in the IP range of an established organization, all you're doing is getting bot traffic.
High-tier blackhats focus on big targets, and low-tier ones focus on low-hanging fruits they find off shodan or application 0days they've found.
bitwize 12 hours ago
"Guys, guys, guys, listen, listen, listen. So I'm in this computer, right? So I'm lookin' around, lookin' around, throwing commands at it, I don't know where it is or what it does or anything..."
forgetfreeman 12 hours ago
stavros 11 hours ago
wildlogic 12 hours ago
wil421 15 hours ago
Tell me more…I opened a plex and Nintendo switch port, the scans were out of control. I’d love to screw over port scanner over.
fragmede 8 hours ago
What does shodan.io run?
themafia 17 hours ago
Noise is a really underrated security layer.
YeahThisIsMe 10 hours ago
That's just security by obscurity, which is rated pretty appropriately.
close04 9 hours ago
raverbashing 6 hours ago
Sounds like creating an url like aspnet_client/admin.php returning a WebObjects header might be a good hobby
kreyenborgi 32 minutes ago
Add in a zip bomb or two?
Lammy 16 hours ago
> IIS has a legacy behavior inherited from the old DOS 8.3 filename convention.
Is this exposing the underlying OS's behavior coupled with the fact that the IIS document root is `C:\Inetpub` by default? Eight-dot-three filenames are enabled by default on the C drive but disabled by default on all other drives on Windows 10/11:
PS> (Get-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion').DisplayVersion
24H2
PS> fsutil 8dot3name query C:
The volume state is: 0 (8dot3 name creation is ENABLED)
The registry state is: 2 (Per volume setting - the default)
Based on the above settings, 8dot3 name creation is ENABLED on "C:"
PS> fsutil 8dot3name query U:
The volume state is: 1 (8dot3 name creation is DISABLED)
The registry state is: 2 (Per volume setting - the default)
Based on the above settings, 8dot3 name creation is DISABLED on "U:"Terr_ 14 hours ago
Tangentially, that reminds me of how a Windows update created c:\inetpub on everybody's non-server computers, to "increase protection" for unspecified reasons.
https://www.pcworld.com/article/2684062/why-is-windows-11-la...
mook 9 hours ago
That page eventually leads to the CVE page: https://msrc.microsoft.com/update-guide/vulnerability/CVE-20...
While that's still pretty vague, it sounds like the issue was that something running as SYSTEM (the page seems to indicate some part of Windows Update) was not correctly checking if inetpub was a symlink or something along those lines. It also links to a script to set ACLs on that directory; presumably that's not possible to do if the directory doesn't exist.
It would probably be better to fix whatever component to not have the link traversal bug, but maybe there's some reason that makes the proper fix infeasible…
Lammy 13 hours ago
> to "increase protection" for unspecified reasons
Everything old is new again https://devblogs.microsoft.com/oldnewthing/20041116-00/?p=37... (2004)
raesene9 11 hours ago
The original research for this is at https://soroush.me/downloadable/microsoft_iis_tilde_characte...
logifail 5 hours ago
> PS> (Get-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\WindowsNT\CurrentVersion').DisplayVersion > 24H2
I got no response to that command on my W10 box, turns out for older (eg LTSC) versions it appears to need:
(Get-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion').ReleaseId
1809xmcp123 6 hours ago
Oh man this takes me back.
Once upon a time, all server logs were basically unusable because of the amount of IIS scanners out there. There was a directory traversal that was literally just url encoding “../“ that absolutely lit the internet on fire for many months.
0x1d7 3 hours ago
Those traversal attempts are still very common, right next to the PHP/WordPress script kiddie attacks.
hstaab 17 hours ago
The tone of this is something else
andai 16 hours ago
Several times, I wondered if Claude wrote it.
Stitch4223 15 hours ago
One confusing part is that the blue screen is not a reference to BSOD but to the IIS default page with the blue squares. That’s probably jargon.
The article lists all the tricks I’ve collected over the years doing pentesting and then some, with great tool references. The signal to noise ratio is very high and there’s little “here’s why” filler which instead might just be someone’s way of storytelling. The article drones on, but with actual content as there is a lot to tell. It’s even light on features like trace.axd, but does mention them and their purposes.
I found it an entertaining overview of taking apart unassuming IIS servers and the point of “Recon harder. ” is made very well :)
Edit: s/boring/unassuming + added point was made very well
0x1d7 3 hours ago
merpkz 11 hours ago
"This is the brute-force fallback when the smart approaches fail, and honestly, it works more often than you’d expect."
Found the LLM generated part.
suslik 11 hours ago
da_grift_shift an hour ago
helloplanets 11 hours ago
Would be a feat on its own to get Claude to write on a topic like this.
andai 8 hours ago
Tiberium 12 hours ago
It did, this article is clearly LLM-written/edited
kitd 10 hours ago
Get Claude to fix IIS, or is that not allowed any more?
t1234s 16 hours ago
Does anyone use IIS anymore?
prussian 3 hours ago
I do. As others have replied, Windows Server--including IIS, means you have a domain joined machine, likely with an SPN of HOST/MACHINE.DOMAIN. Windows services and IIS App Pool Identities log in with an (g)MSA or virtual accounts (NT Service*) and you get a fully working and managed Kerberos experience without having to deal with 30, 60, 90 day password rotations. Log into your MS SQL Server with Kerberos, log into some other webapp's oauth2 flow with Kerberos, etc, it all just works. You can use WinRM with your native Windows shell without having to do anything special, and even technically bypass 2FA since that's just how it really works.
Can you do all this on Linux? Yes. Will it ever be set up correctly? Depends where you work, but based on my experience so far, not likely.
zamalek 2 hours ago
> with Kerberos, etc, it all just works
I worked with customer's AD environments in the 2010's and I remember whiteboards of figuring out customer Kerberos config. "it all just works" is not my recollection of that 3-headed beast lmao.
bartnp 41 minutes ago
Yep.
And as an ignoramus: what it is that you are supposed to be using nowadays?
Think in the context of a small company making enterprise .NET (framework) code where Windows is the world, cloud wouldn't fly with the customers, SOAP is still king and your one IT guy is too busy to notice anything happened after 2010. Suppose also that entire software rewrites are impossibly impractical, and that while you'd love to take some security gains, you just don't have the capacity to do configuration deep dives let alone to gamble on something complex like Kubernetes.
samplatt 14 hours ago
Way, WAY too many corporate IT divisions.
naturalmovement 14 hours ago
Some banks still use IIS.
Every large company big enough to host an intranet is running IIS somewhere, possibly everywhere. It integrates well with AD so some really complex tasks become stupid simple.
It's seeing less and less usage as the world moves to AWS which is equally stupid because you're tied to one vendor's proprietary products (Amazon) again. Except this time you don't own the hardware.
Public sector IT loves IIS. Check your municipality's tax or property website it's probably got .aspx scripts out the ass.
I've seen it hosting European web apps, public sector if I recall. Lots of bespoke .NET applications out there with SQL Server backends running entire local governments.
Asian countries especially China and Taiwan love IIS and use it to host anything and everything. This is a personal observation.
Sure the world has mostly moved on, but there's tons of legacy code out there that keeps cities and really important organizations humming that runs on IIS and it's never changing.
You think that's bad, there's still places out there running AS/400 stuff on the web, Lotus Notes, and Novell Groupwise (gasp).
forkerenok 11 hours ago
Heyyy what's wrong with novel groupwise?
raesene9 11 hours ago
qingcharles 15 hours ago
Yeah, I regularly speak to folks still running IIS on Windows Server. There are a lot of old apps out there, sadly. Some really, really important ones.
thedougd 14 hours ago
Amazingly some companies like Hyland still ship software that requires IIS. Bonus add are the pages and pages of setup instructions.
robotnikman a minute ago
And NCR from my experience.
dagaci 7 hours ago
IIS also sits at the back of a many "modern" cloud web type services.
y2244 5 hours ago
Lots and lots
A lot of Microsoft devs know very little Linux historically as they used windows and are comfortable with it
Decreasing due to cloud and Nodejs takeup
AznHisoka 14 hours ago
A lot of big corps still use it.
vlan0 15 hours ago
The entire solarwinds platform(barf)
catmanjan 5 hours ago
SharePoint uses it extensively
swarnie 12 hours ago
I would say 75% of my webservers are IIS.
Nothing internet facing mind.
forgetfreeman 12 hours ago
but...why?
swarnie 11 hours ago
esikich 14 hours ago
Yes, but typically just internal corporate intraweb stuff from what I've seen.
mpyne 15 hours ago
Tons of the Navy's public websites still run on it.
formerly_proven 8 hours ago
The text uses target.com as a placeholder but they actually also have an IIS blue screen: https://knslsd.target.com/
jimt1234 12 hours ago
Back in the early-2000s, I passed the Microsoft certification exam for IIS. I had never even heard of the product (I was told my company had some extra credits at the testing center, I was there taking another exam (Solaris 8 certification), so I figured why not?) I know, MCSE exams were notoriously simple back then, but good god - usually, for every question, 3 of the 4 possible answers didn't even make sense. Anyway, I figured there was no way IIS would last if any dipshit could become "certified" in the product.
bitwize 12 hours ago
That's the value add. Any dipshit can be trained in the Windows server stack, so you can staff your back office with dipshits. For a while in the early 2000s—before the cloud era—Windows was routinely found to have a lower TCO than Linux as a server OS for precisely this reason. More actual deployments too, especially in corporate intranets.
AuthAuth 17 hours ago
Ah webpage formatting cooked but otherwise a fun read
Group_B 16 hours ago
Would love to see a write yo on nginx!
sytelus 17 hours ago
This is extremely well done design (at least on full desktop browsers). Amazing content as well.
aix1 13 hours ago
> This is extremely well done design (at least on full desktop browsers).
I can't tell if you're being sarcastic, but on my full desktop browser the side bar overlaps the main panel, putting text on top of other text.
P.S. Other than this, I do like the presentation.
Shellban 12 hours ago
It looks decent on my 1920x1080p window running on a 4K monitor, but I have overlapping problems on my M1 Macbook.
mopsi 16 hours ago
"Amazing" is a little generous for script kiddie stuff from the early 2000s.
The author has yet to learn the extent to which civilization depends on people not being cunts to one another for no good reason.
BalinKing 15 hours ago
The lead says "how I approach IIS targets during bug bounty" (emphasis mine), so (assuming the author is being truthful) I'm guessing the tone of the title is just for fun.
caspper69 16 hours ago
Ah yes, the lulz, the great American pastime.
deadbabe 16 hours ago
Civilization has a way of dealing with these individuals: prison.
dakolli 14 hours ago
NooneAtAll3 13 hours ago
what's the deal with left sidebar overlapping the main text?
kahf56 12 hours ago
good entertainment