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Shutdown (Charlie BROMBERG) Profile picture
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19 Oct, 4 tweets, 3 min read
Shouldn't we all agree that using a certificate to go through a PKINIT Kerberos pre-auth to obtain a TGT should be called Pass-the-Certificate? Or is there a reason we should avoid using that term?
Pass-the-Certificate is useful for the following attacks
- AD CS ESC8 NTLM relay cc/ @harmj0y @tifkin_ @ExAndroidDev
- Shadow Credentials (ACE abuse on accounts' msDs-KeyCredentialLink attribute) cc/ @MGrafnetter @elad_shamir
- UnPAC-the-hash cc/ @_dirkjan @elad_shamir
It can be operated when obtaining a certificate with Rubeus or @_dirkjan's PKINITtools (gettgtpkinit).

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More from @_nwodtuhs

Shutdown (Charlie BROMBERG) Profile picture
22 Jul
[thread] A lot of people since this finding are looking for a bit knowledge around that bug. Below is list of links that will help better understand this (attackers-side)
PetitPotam’s MS-EFSR abuse is the equivalent (even better) of the PrinterBug’s MS-RPRN abuse that’s been here for a while now

1️⃣ PrinterBug: thehacker.recipes/active-directo…
2️⃣ PetitPotam: thehacker.recipes/active-directo…
Coercing a machine’s authentication is a technique allows for the capture or relay of that auth.

1️⃣ capture: thehacker.recipes/active-directo…
2️⃣ relay: thehacker.recipes/active-directo…
Read 12 tweets
Shutdown (Charlie BROMBERG) Profile picture
20 Jul
[thread] Hi hackers! @podalirius_ and I present to you this new tool 🌟🎀 𝖘𝖒𝖆𝖗𝖙𝖇𝖗𝖚𝖙𝖊 🎀🌟

This tool allows for bruteforcing NTLM and Kerberos in Active Directory domains (there are A LOT of features, detailed in the thread below).

➡️ github.com/ShutdownRepo/s…
This tool offers two modes: smart and brute.

1⃣ Brute mode: can be used with a user and password/hash to test (or list of those).

2⃣ Smart mode: given a valid AD account credentials, it fetches the users list and lockout policies to bruteforce wihtout locking accounts.
Authentication attempts can be operated over NTLM (over SMB or LDAP) or Kerberos 🐶 (pre-authentication attacks).

Kerberos pre-authentication attempts can be operated through UDP (faster 🚅) or TCP.
Read 17 tweets
Shutdown (Charlie BROMBERG) Profile picture
22 Apr
(infosec thread) one of my latest tweets was followed by some questions in my DMs. So let's answer those here and remind some concepts😈

I'll talk about pass-the-hash, pass-the-ticket, pass-the-key, overpass-the-hash, pass-the-cache, silver and golden tickets 👇
Pass-the-Hash (1/4) : NTLM (LM, LMv2, NTLM or NTLMv2 depending on the version) is an authentication protocol used by Windows and AD-DS. Users have passwords, which are stored in a hashed format (LM or NT hash depending on the security settings and version).
Pass-the-Hash (2/4) : when authenticating to a remote service, the password hash is used to compute a ChallengeResponse. The LM hash is used for the LM version of the protocol while the NT hash is used for LMv2, NTLM and NTLMv2.
Read 25 tweets
Shutdown (Charlie BROMBERG) Profile picture
21 Apr
@podalirius_ and I made GPP Passwords great again. We wrote a Python script, using Impacket, to find and decrypt passwords in Group Policy Preferences, without having to mount the remote share 👇[a thread]

➡️ github.com/SecureAuthCorp…
The script can be directly added to Impacket's examples (like in the PR above) but it can also be run as a standalone tool (clone the repo below)

github.com/ShutdownRepo/G…
Just like all other Impacket examples, the logging is color-less and it can be quite a mess (with the -debug option)

However, grc (github.com/garabik/grc) can bring colors to the output
Read 6 tweets

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