Black Hat Ethical Hacking
New Windows 10 zero-day gives admin rights, gets unofficial patch

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Free unofficial patches have been released to protect Windows users from a local privilege escalation (LPE) zero-day vulnerability in the Mobile Device Management Service impacting Windows 10, version 1809 and later.
The security flaw resides under the “Access work or school” settings, and it bypasses a patch released by Microsoft in February to address an information disclosure bug tracked as CVE-2021-24084.

However, security researcher Abdelhamid Naceri (who also reported the initial vulnerability) discovered this month that the incompletely patched flaw could also be exploited to gain admin privileges after publicly disclosing the newly spotted bug in June.

“Namely, as HiveNightmare/SeriousSAM has taught us, an arbitrary file disclosure can be upgraded to local privilege escalation if you know which files to take and what to do with them,” 0patch co-founder Mitja Kolsek explained today.

“We confirmed this by using the procedure described in this blog post by Raj Chandel in conjunction with Abdelhamid’s bug – and being able to run code as local administrator.”

While Microsoft has most likely also noticed Naceri’s June disclosure, the company is yet to patch this LPE bug, exposing Windows 10 systems with the latest November 2021 security updates to attacks.

Luckily, attackers can only exploit the vulnerability if two very specific conditions are met:

* System protection must be enabled on drive C, and at least one restore point created. Whether system protection is enabled or disabled by default depends on various parameters.
* At least one local administrator account must be enabled on the computer, or at least one “Administrators” group member’s credentials cached.
See Also: Complete Offensive Security and Ethical Hacking Course Unofficialpatches for all impacted Windows 10 systemsUntil Microsoft releases security updates to address this security issue (likely during next month’s Patch Tuesday), the 0patch micropatching service has released free and unofficial patches for all affected Windows 10 versions (Windows 10 21H2 is also impacted but is not yet supported by 0patch):

1. Windows 10 v21H1 (32 & 64 bit) updated with November 2021 Updates
2. Windows 10 v20H2 (32 & 64 bit) updated with November 2021 Updates
3. Windows 10 v2004 (32 & 64 bit) updated with November 2021 Updates
4. Windows 10 v1909 (32 & 64 bit) updated with November 2021 Updates
5. Windows 10 v1903 (32 & 64 bit) updated with November 2021 Updates
6. Windows 10 v1809 (32 & 64 bit) updated with May 2021 Updates

“Windows Servers are not affected, as the vulnerable functionality does not exist there. While some similar diagnostics tools exist on servers, they are being executed under the launching user’s identity, and therefore cannot be exploited,” Kolsek added.
See Also: New Windows zero-day with public exploit lets you become an admin “Windows 10 v1803 and older Windows 10 versions don’t seem to be affected either. While they do have the ‘Access work or school’ functionality, it behaves differently and cannot be exploited this way. Windows 7 does not have the ‘Access work or school’ functionality at all.”
These FREE 0day patches for all affected versions (Windows 10 versions from v1809 to v21H1) are immediately available. They will remain free until Microsoft has provided an official fix fo[...]

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r this issue.

— 0patch (@0patch) November 26, 2021
See Also: Offensive Security Tool: Hashcat How to install the micropatchTo install the unofficial patch on your system, you will need to register a 0patch account and install the 0patch agent.

Once you launch the agent on your device, the patch will be applied automatically (if there are no custom patching enterprise policies enabled to block it) without requiring a restart.

This is the second Windows zero-day that received a micropatch this month after Naceri found that patches for another bug (CVE-2021-34484) in the Windows User Profile Service could be bypassed to escalate privileges on all Windows versions, even if fully patched.

Microsoft also needs to patch a third zero-day bug in the Microsoft Windows Installer with a proof-of-concept (PoC) exploit released by Naceri over the weekend.

If successfully exploited, the zero-day allows attackers to gain SYSTEM privileges on up-to-date devices running the latest Windows versions, including Windows 10, Windows 11, and Windows Server 2022.

Malware creators have since started testing the PoC exploit in low volume attacks likely focused on testing and tweaking it for future full-blown campaigns.
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The post New Windows 10 zero-day gives admin rights, gets unofficial patch first appeared on Black Hat Ethical Hacking.

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OffensiveRust - Rust Weaponization For Red Team Engagements
http://www.kitploit.com/2021/11/offensiverust-rust-weaponization-for.html

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cargo new This will automatically create the structured project folders with: project
├── Cargo.toml
└── src
└── main.rs Cargo.toml is the file that contains the dependencies and the configuration for the compilation. main.rs is the main file that will be compiled along with any potential directories that contain libraries. For compiling the project, go into the project directory (https://www.kitploit.com/search/label/Directory) and execute:
cargo build This will use your default toolchain. If you want to build the final "release" version execute:
cargo build --release For static binaries, in terminal before the build command execute:
"C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat"
set RUSTFLAGS=-C target-feature=+crt-static In case it does not feel easy for you to read my code the way it is written,
you can also you the below command inside the project directory to format it in a better way
cargo fmt Certain examples might not compile and give you some error, since it might require a nightly
build of Rust with the latest features. To install it just do:
rustup default nightly The easiest place to find the dependencies or Crates (https://crates.io/) as they are called. Cross Compiling Cross-Compiling requires to follow the instructions here (https://rust-lang.github.io/rustup/cross-compilation.html) By installing different toolchains, you can cross compile with the below command
cargo build --target To see the installed toolchains on your system do:
rustup toolchain list For checking all the available toolchains you can install in your system do:
rustup target list For installing a new toolchain do:
rustup target add Optimizing executables for size This repo (https://github.com/johnthagen/min-sized-rust) contains a lot of configuration options and ideas about reducing the file size. Static binaries are usually quite big. Pitfalls I found myself falling into Careful of \0 bytes, do not forget them for strings in memory, I spent a lot of my time but windbg always helped resolving it. Interesting Rust libraries WINAPI WINAPI2 (https://github.com/MauriceKayser/rs-winapi2) Windows - This is the official Microsoft one that I have not played much with OPSEC Even though Rust has good advantages it is quite difficult to get used to it and it ain't very intuitive. Shellcode generation is another issue due to LLVM. I have found a few ways to approach this.
Donut (https://github.com/TheWover/donut) sometimes does generate shellcode that works but depending on how the project is made, it might not.
In general, for shellcode generation the tools that are made should be made to host all code in .text segment, which leads to this amazing repo (https://github.com/b1tg/rust-windows-shellcode). There is a shellcode sample in this project that can show you how to structure your code for successfull shellcode generation.
In addition, this project also has a shellcode generator that grabs the .text segment of a binary and and dumps the shellcode after executing some patches.
This project grabs from a specific location the binary so I made a fork that receives the path of the binary as an argument here (https://github.com/trickster0/rust-windows-shellcode-custom). Even if you remove all debug symbols, rust can still keep references to your home directory in the binary. The only way I've found to remove this is to pass the following flag: --remap-path-prefix {your home directory}={some random identifier}. You can use bash variables to get your home directory and generate a random placeholder: --remap-path-prefix "$HOME"="$RANDOM". (By Yamakadi (https://github.com/yamakadi)) Although for the above there is another way to remove info about the home directory by adding at the top of Cargo.toml

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cargo-features = ["strip"] . Since Rust by default leaves a lot of things as strings in the binary, I mostly use this cargo.toml (https://github.com/trickster0/OffensiveRust/blob/master/cargo.toml) to avoid them and also reduce size
with build command
cargo build --release -Z build-std=std,panic_abort -Z build-std-features=panic_immediate_abort --target x86_64-pc-windows-msvc Other projects I have have made in Rust UDPlant (https://github.com/trickster0/UDPlant) - Basically a UDP reverse shell EDR Detector (https://github.com/trickster0/EDR_Detector) - Detects the EDRs of the installed system according to the .sys files installed Lenum (https://github.com/trickster0/Lenum) - A simple unix enumeration (https://www.kitploit.com/search/label/Enumeration) tool Projects in Rust that can be hepfull houdini (https://github.com/yamakadi/houdini) - Helps make your executable self-delete

Download OffensiveRust (https://github.com/trickster0/OffensiveRust)

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Hacking on Medium
How to customize your terminal in Windows 10

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You didn’t know you could do that, right? That’s why you are here.

Continue reading on Medium »

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Hacking on Medium
picoCTF write up: Obedient cat

https://cdn-images-1.medium.com/max/600/1*KlGimrIDTFUJqDXnARmz1w.jpeg
Note: You should not copy flag from here just find one by following steps mentioned here.

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hacking: security in practice
[TCP Reset attack] how to set the sequence number directly with nping?

To attack a telnet connection, it takes to send the sequence number for a TCP Reset. But when I set the sequence number with:
# nping --tcp --flags rst -c1 --dest-ip server-ip -p 23 -S victim-ip -g victim-port --seq seqnumber-on-wireshark
the sequence number is absolutely not the one I've typed. To ensure the attack passes, I need to compute the following:
2^32 - seqnumber-by-default-of-the-attacker + seqnumber-on-wireshark
Would you know how to set the sequence number directly?

submitted by /u/thomasbbbb
[link] [comments]

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KitPloit - PenTest Tools!
OffensiveRust - Rust Weaponization For Red Team Engagements

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Kali Linux Tutorials
Tor-Rootkit : A Python 3 Standalone Windows 10 / Linux Rootkit Using Tor

Tor-Rootkit is a Python 3 standalone Windows 10 / Linux Rootkit. The networking communication get’s established over the tor network.

How To Use

* Clone the repo and change directory:

git clone https://github.com/emcruise/TorRootkit.git
cd ./tor-rootkit

Build docker container:

docker build -t listener .

Run docker container:

docker run -v $(pwd)/executables:/executables/ -it listener

Deploy the executables: When the listener is up and running it generates a “executables” directory containing different payloads for different plattforms.

TorRootkit/
│ …
└ executables/

Note: The client can take some time to connect because PyInstaller executables are a bit slower and it need’s to start tor.

Features

* Standalone executables for Windows and Linux, including python interpreter and tor
* the whole communication works over tor hidden services which guarantees some degree of anonymity
* The Listener can handle multiple clients
* The Listener generates payloads for different platforms on startup

Listener Shell Commands
CommandExplanationhelpShows the help menu^C or exitExits the shelllistlists all connected clients with their according indexselect start shell with client
Client Shell Commands
CommandExplanationhelpShows the help menu^C or exitExits the client shell and returns to listener shellos Executes a command in the clients shell and returns the outputbackgroundKeeps the connection to a client and returns to listener

Download

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Hacking on Medium
picoCTF write up: Mod 26

https://cdn-images-1.medium.com/max/600/1*KlGimrIDTFUJqDXnARmz1w.jpeg
Note: You should not copy flag from here just find one by following steps mentioned here.

Continue reading on Medium »

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Hacking on Medium
picoCTF write up: Python Wrangling

https://cdn-images-1.medium.com/max/600/1*KlGimrIDTFUJqDXnARmz1w.jpeg
Note: You should not copy flag from here just find one by following steps mentioned here.

Continue reading on Medium »

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Hacking on Medium
picoCTF write up: Wave a flag

https://cdn-images-1.medium.com/max/600/1*KlGimrIDTFUJqDXnARmz1w.jpeg
Note:

Continue reading on Medium »

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