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I am having problem with connecting to my new instance directly from the browser. This is literally a new instance of Fedora OS so I have not configured anything. It doesn't work out of the box.

I have other servers with OS like Debian 10 (Buster) and they seem to work fine when connecting through SSH.

Here are the server specs that I am using for the VM:

I want to write a script that divides the lines read from the file into packages of 25, unfortunately the sample package returns 40 codes. I would like to do so that, for example, he divided me into packages of 25 items. I mean, I have, for example, 60 codes, this creates 2 packages of 25, and one with 10 codes. Unfortunately, I can't handle it.

Short disclaimer: As this question includes topics regarding hacking/pentesting, I'd like to state that this question is only asked for educational purposes as part of a school project. To prevent possible abuse, I will only post code that is necessary for understanding the problem.

To demonstrate dangers and vulnerabilities of Windows 10, I'm currently writing a small C++/WinAPI application that utilizes two common techniques:

• A UAC bypass using the "fodhelper technique" (this works by simply setting a specific registry value to the path of the executable which is supposed to be elevated and then launching an automatically elevated Windows executable called "fodhelper.exe", which will then read the registry value and execute it as command/launch the specified application).
• Performing PE injection, i.e. running a PE file from the address space of the current process (based on this example from github). The PE that gets injected in my program is a simple C++ Console Application (x86) that prints a message box. The shellcode is hardcoded in the injector binary (x86).

I managed to perform both of these techniques successfully in independent files. However, once I combine these two methods (i.e. first elevating, then injecting), a weird error appears.

When the injector gets started manually (by double clicking), everything works fine, but when the injector is launched by System32\fodhelper.exe (x64) as a result of the UAC bypass, the following happens: After the injection has finished, the console window of the injected application appears, but instead of continuing the execution, I receive a bunch of error messages stating "The code execution cannot proceed because [garbage characters].dll was not found". This indicates that something went wrong with the offsets, and the Windows loader is trying to read the imports at a wrong position.

To summarize: The code injection works fine, unless the injector was started by fodhelper.exe. In this case the injected PE file is unable to run.

• Debugging the injection using GetLastError and printing the various memory addresses used during the injection. There is no difference if the file is manually started (and the injection is successful) or if it gets started by fodhelper.exe (and the injection fails).
• Replace the WriteProcessMemory calls with WriteFile to compare the output file when the injector gets manually launched or by fodhelper.exe. Both output files are exactly the same and runnable. This indicates that the injection itself is not the problem, but the Windows loader seems to act differently.
• Manually elevating the injector using UAC or by using an elevated command prompt. In both cases, the injection is successful.
• Copying fodhelper.exe to another location (for example to the desktop) and launching this copy. In this case, the injection is successful. The injection only fails if the injector gets started by the original fodhelper.exe in the System32 folder.

It seems that the injection behaves completely identical, but the indicators show that due to some unknown impact of fodhelper.exe that gets passed down to the injector, the Windows loader seems to behave differently.

I appreciate any explanation or assumption! Feel free to ask if you require more information.

(with limited debug info and comments): https://0bin.net/paste/UPRIg12n#6nJvBok72UcDvIa56c-XEss7AibIh1Zrs+c3sUzvQMj

Note: See how the injection works if you exclude the elevateProcess function or manually elevate the exe with UAC, and how it fails when including said function.

According to the answer by user RbMm, this error is a result of a specific exploit protection attribute (PROC_THREAD_ATTRIBUTE_MITIGATION_POLICY with the EnableModuleTamperingProtection value) that gets automatically applied onto fodhelper.exe and seemingly gets inherited by all child processes. According to this, removing/resetting this attribute when launching the target process should fix the error. So far I've tried the following, but couldn't achieve any change in the outcome:

I have to join two spark data-frames in Scala based on a custom function. Both data-frames have the same schema.

Sample Row of data in DF1:

I'm trying to add a logo on top of a concatenated video. The video concatenation and the adding of the logo should be in the same filter complex. My filter complex currently looks like this (it is generated by Bash):

I'm trying to compile the following sources and the header:

5-book.cpp