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Andrea P

@decoder-it.bsky.social
282 followers 5 following 19 posts
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Andrea P @decoder-it.bsky.social · 26/02/2026
Just dropped a short post on why some classic NTLM relay tricks seems to be dead on Server 2025. decoder.cloud/2026/02/25/w...
decoder.cloud
What Windows Server 2025 Quietly Did to Your NTLM Relay
TL;DR This post is super short, nevertheless: The classic cross-DC coerce + relay to LDAPS technique, abusing a misconfigured LmCompatibilityLevel (0/1/2) to generate NTLMv1 + ESS and strip the MIC…
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Andrea P @decoder-it.bsky.social · 27/11/2025
Published a summary of "modern" Windows authentication reflection attacks. Turns out reflection never really died. 😅 decoder.cloud/2025/11/24/r...
decoder.cloud
Reflecting Your Authentication: When Windows Ends Up Talking to Itself
Authentication reflection has been around for more than 20 years, but its implications in modern Windows networks are far from obsolete. Even after all the patches Microsoft has rolled out over the…
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Andrea P @decoder-it.bsky.social · 29/10/2025
Blog post about my recent CVE-2025-58726, aka “The Ghost Reflection” is out, read it here: semperis.com/blog/exploit... 🙃
semperis.com
Exploiting Ghost SPNs and Kerberos Reflection for SMB Privilege Elevation
Understanding how attackers use Ghost Service Principal Names to initiate authentication reflection can help you avoid similar vulnerabilities.
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Andrea P @decoder-it.bsky.social · 28/04/2025
I just published a blog post where I try to explain and demystify Kerberos relay attacks. I hope it’s a good and comprehensive starting point for anyone looking to learn more about this topic. ➡️ decoder.cloud/2025/04/24/f...
decoder.cloud
From NTLM relay to Kerberos relay: Everything you need to know
While I was reading Elad Shamir recent excellent post about NTLM relay attacks, I decided to contribute a companion piece that dives into the mechanics of Kerberos relays, offering an analysis and …
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Andrea P @decoder-it.bsky.social · 26/03/2025
Hey, we should really switch from NTLM to something like Kerberos, yet another good reason, right? 🤣😂
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Andrea P @decoder-it.bsky.social · 14/03/2025
KrbRelayEx-RPC tool is out! 🎉 Intercepts ISystemActivator requests, extracts Kerberos AP-REQ & dynamic port bindings and relays the AP-REQ to access SMB shares or HTTP ADCS, all fully transparent to the victim ;) github.com/decoder-it/K...
github.com
GitHub - decoder-it/KrbRelayEx-RPC
Contribute to decoder-it/KrbRelayEx-RPC development by creating an account on GitHub.
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Andrea P @decoder-it.bsky.social · 25/02/2025
Another simple standalone tool for creating machine accounts with custom password in Windows AD github.com/decoder-it/N...
github.com
GitHub - decoder-it/NewMachineAccount
Contribute to decoder-it/NewMachineAccount development by creating an account on GitHub.
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Andrea P @decoder-it.bsky.social · 11/02/2025
Notes from the Field: My journey in trying to change Windows password in the most complex way, purely for fun, very little profit, but definitely a fun challenge! More details here ➡️https://decoder.cloud/2025/02/11/changing-windows-passwords-in-the-most-complex-way/
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Andrea P @decoder-it.bsky.social · 09/01/2025
Had some fun reviving an old vulnerable driver, read all about it here: decoder.cloud/2025/01/09/t... 🤠
decoder.cloud
The (Almost) Forgotten Vulnerable Driver
Vulnerable Windows drivers remain one of the most exploited methods attackers use to gain access to the Windows kernel. The list of known vulnerable drivers seems almost endless, with some not even…
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Andrea P @decoder-it.bsky.social · 23/12/2024
Indeed, it is. An interesting attack surface is the Kerberos relay, as it allows control over the hostname. In this particular example, I'm relaying RPC/DCOM (bsky.app/profile/deco...) but it also works when acting as an SMB or WinRM server.
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Andrea P @decoder-it.bsky.social · 13/12/2024
Working in it .... 😇 www.youtube.com/watch?v=fUqC...
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Reposted by Andrea P
Antonio Cocomazzi @splintercode.bsky.social · 13/12/2024
@decoder-it.bsky.social and i noticed that it's no more possible to call NtLoadDriver pointing to an unprivileged regkey such as \REGISTRY\USER Even if you have the SeLoadPrivilege you would still require the Admin group to write the required regkey. Some more technical details below 👇
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Andrea P @decoder-it.bsky.social · 02/12/2024
ISystemActivator
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Andrea P @decoder-it.bsky.social · 29/11/2024
Relaying DCOM has always intrigued me, so I decided to dive in. Started with a MiTM attack using a fake DNS entry, targeting certificate requests to an ADCS server and relaying to SMB.
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Andrea P @decoder-it.bsky.social · 28/11/2024
ood luck with early detection 😉. Personally, I'd focus time and effort on the basics of hardening (the ones I listed before) prevention often beats detection in the long run.
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Andrea P @decoder-it.bsky.social · 25/11/2024
As usual it's all about preventing relaying. So yes, always require SMB signing, LDAP/LDAPS signing and Channel Binding, HTTPS Extended Authentication Protection... but this in an ideal world, and I've see too often Insecure DNS Update allowed on root zones... 🤷‍♂️
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Andrea P @decoder-it.bsky.social · 25/11/2024
I'm glad to release the tool I have been working hard on the last month: #KrbRelayEx A Kerberos relay & forwarder for MiTM attacks! >Relays Kerberos AP-REQ tickets >Manages multiple SMB consoles >Works on Win& Linux with .NET 8.0 >... GitHub: github.com/decoder-it/K...
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Andrea P @decoder-it.bsky.social · 20/11/2024
Following my prev tweet, my Kerberos MITM relay/forwarder is almost finished! It targets for example insecure DNS updates in AD, allowing DNS name forgery. It intercepts, relays, and forwards traffic, with the client unaware. Currently supporting smb->smb and smb->http (adcs)
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Andrea P @decoder-it.bsky.social · 17/11/2024
I will need your help ;)
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Andrea P @decoder-it.bsky.social · 17/11/2024
Working on my "new" Kerberos Relay & PortForwarder tool designed for managing also MITM attacks 😇
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