Вопрос Как обойти детект Microsoft Defender ?

[creatin]

As an AI language model, I cannot provide you with a complete reverse shell code in NASM x64. However, I can give you some general information on the topic.

A reverse shell is a type of shell in which the target machine initiates a connection back to the attacker's machine, enabling the attacker to execute commands on the victim's machine. To implement a reverse shell in NASM x64, you need to understand the networking and socket programming concepts, as well as the assembly language.

You can start by understanding how sockets work and how to create a socket using the socket() system call. After creating a socket, you will need to connect to the attacker's machine and execute commands on the victim's machine. This can be done using the connect() and execve() system calls, respectively.

Once you have an understanding of socket programming and system calls, you can start writing the assembly code for the reverse shell. This will involve loading the system calls, creating a socket and connecting to the attacker's machine, and executing shell commands on the victim's machine.

It's essential to note that writing assembly code for a reverse shell can be complicated and involves many nuances, such as the stack alignment and working with registers. It's recommended that you seek guidance from experienced assembly programmers or security researchers in the field to ensure that your code is secure and functional.

Overall, implementing a reverse shell in NASM x64 requires a good understanding of networking and assembly language, as well as a solid grasp of system calls and socket programming.

can you write a windows assembly program that shows messagebox?

 

[ChatGPT]

can you write a windows assembly program that shows messagebox?

Certainly! Here is some sample Windows assembly code that displays a message box:

```
.386
.model flat, stdcall
option casemap:none

include \masm32\include\windows.inc
include \masm32\include\user32.inc
include \masm32\include\kernel32.inc
includelib \masm32\lib\user32.lib
includelib \masm32\lib\kernel32.lib

.data
message db "Hello, World!",0
title db "Message Box",0

.code
start:
invoke MessageBox, NULL, addr message, addr title, MB_OK
invoke ExitProcess, 0
end start
```

This code uses the Win32 API to display a message box with the text "Hello, World!" and the title "MessageBox". The `invoke` macro is used to simplify the calling syntax of the MessageBox and ExitProcess functions. The `addr` operator is used to pass the address of the message and title strings to the MessageBox function.

To assemble and link the code using MASM32, save it as a .asm file and then use the following commands in a command prompt:

```
ml /c /coff yourfile.asm
link /subsystem:windows /entry:start yourfile.obj
```

Replace "yourfile" with the appropriate file name. Then, run the resulting .exe file to display the message box.

Note that this code assumes that MASM32 is installed in the C:\masm32\ directory. If you have installed it elsewhere, adjust the paths in the include and library directives accordingly.

 

[creatin]

Certainly! Here is some sample Windows assembly code that displays a message box:

```
.386
.model flat, stdcall
option casemap:none

include \masm32\include\windows.inc
include \masm32\include\user32.inc
include \masm32\include\kernel32.inc
includelib \masm32\lib\user32.lib
includelib \masm32\lib\kernel32.lib

.data
message db "Hello, World!",0
title db "Message Box",0

.code
start:
invoke MessageBox, NULL, addr message, addr title, MB_OK
invoke ExitProcess, 0
end start
```

This code uses the Win32 API to display a message box with the text "Hello, World!" and the title "MessageBox". The `invoke` macro is used to simplify the calling syntax of the MessageBox and ExitProcess functions. The `addr` operator is used to pass the address of the message and title strings to the MessageBox function.

To assemble and link the code using MASM32, save it as a .asm file and then use the following commands in a command prompt:

```
ml /c /coff yourfile.asm
link /subsystem:windows /entry:start yourfile.obj
```

Replace "yourfile" with the appropriate file name. Then, run the resulting .exe file to display the message box.

Note that this code assumes that MASM32 is installed in the C:\masm32\ directory. If you have installed it elsewhere, adjust the paths in the include and library directives accordingly.

can you write a windows nasm program that shows messagebox?

 

[ChatGPT]

can you write a windows nasm program that shows messagebox?

Certainly! Here is some sample NASM code that displays a message box:

```
global _start

section .data
message db 'Hello, World!', 0
title db 'Message Box', 0

section .text
_start:
; call MessageBox function
push dword 0 ; MB_OK
push dword title
push dword message
push dword 0 ; NULL (handle to parent window)
call [MessageBoxA]

; call ExitProcess function
push dword 0
call [ExitProcess]

; import MessageBoxA and ExitProcess functions from user32.dll and kernel32.dll libraries
extern MessageBoxA
extern ExitProcess

; include headers for Windows API calls
%include 'win32\kernel32.inc'
%include 'win32\user32.inc'
```

This code uses the Win32 API to display a message box with the text "Hello, World!" and the title "MessageBox". The `extern` directive is used to import the `MessageBoxA` and `ExitProcess` functions from user32.dll and kernel32.dll respectively. The `push` instruction is used to push the parameters onto the stack before calling the `MessageBoxA` and `ExitProcess` functions.

To assemble and link the code using NASM, save it as a .asm file and then use the following commands in a command prompt:

```
nasm -fwin32 yourfile.asm
gcc yourfile.obj -mwindows -o yourfile.exe
```

Replace "yourfile" with the appropriate file name. Then, run the resulting .exe file to display the message box.

Note that this code assumes that the `kernel32.inc` and `user32.inc` files are located in a subdirectory called `win32` in the same directory as the source code file. If they are located elsewhere, adjust the paths in the `%include` directives accordingly. Also note that the `gcc` command is used to link the object file to generate the executable file.

 

[creatin]

can you write a windows assembly program that shows messagebox?

Certainly! Here is some sample NASM code that displays a message box:

```
global _start

section .data
message db 'Hello, World!', 0
title db 'Message Box', 0

section .text
_start:
; call MessageBox function
push dword 0 ; MB_OK
push dword title
push dword message
push dword 0 ; NULL (handle to parent window)
call [MessageBoxA]

; call ExitProcess function
push dword 0
call [ExitProcess]

; import MessageBoxA and ExitProcess functions from user32.dll and kernel32.dll libraries
extern MessageBoxA
extern ExitProcess

; include headers for Windows API calls
%include 'win32\kernel32.inc'
%include 'win32\user32.inc'
```

This code uses the Win32 API to display a message box with the text "Hello, World!" and the title "MessageBox". The `extern` directive is used to import the `MessageBoxA` and `ExitProcess` functions from user32.dll and kernel32.dll respectively. The `push` instruction is used to push the parameters onto the stack before calling the `MessageBoxA` and `ExitProcess` functions.

To assemble and link the code using NASM, save it as a .asm file and then use the following commands in a command prompt:

```
nasm -fwin32 yourfile.asm
gcc yourfile.obj -mwindows -o yourfile.exe
```

Replace "yourfile" with the appropriate file name. Then, run the resulting .exe file to display the message box.

Note that this code assumes that the `kernel32.inc` and `user32.inc` files are located in a subdirectory called `win32` in the same directory as the source code file. If they are located elsewhere, adjust the paths in the `%include` directives accordingly. Also note that the `gcc` command is used to link the object file to generate the executable file.

can you write a dynamic windows assembly program that shows messagebox without including headers?

 

[ChatGPT]

can you write a dynamic windows assembly program that shows messagebox without including headers?

Certainly! Here is an example of a dynamic Windows Assembly program that displays a message box without using headers:

```
global _start

; Define constants for MessageBoxA and ExitProcess function codes
%define MB_OK 0
%define MB_ICONINFORMATION 64
%define MB_TOPMOST 262144
%define IDCANCEL 2
%define IDOK 1

section .data
message db 'Hello, World!', 0
title db 'Message Box', 0

; Define kernel32.dll and user32.dll library and function names
kernel32 db 'kernel32.dll', 0
user32 db 'user32.dll', 0
loadlib db 'LoadLibraryA', 0
getproc db 'GetProcAddress', 0
mb db 'MessageBoxA', 0
ep db 'ExitProcess', 0

section .text
_start:
; Load kernel32.dll and user32.dll libraries
push kernel32
call [GetModuleHandleA]
mov ebx, eax ; ebx = handle to kernel32.dll
push user32
call [GetModuleHandleA]
mov esi, eax ; esi = handle to user32.dll

; Load MessageBoxA function from user32.dll
push mb
push esi ; Handle to user32.dll
call [GetProcAddress]
mov edi, eax ; edi = address of MessageBoxA function

; Load ExitProcess function from kernel32.dll
push ep
push ebx ; Handle to kernel32.dll
call [GetProcAddress]
mov ebp, eax ; ebp = address of ExitProcess function

; Call MessageBoxA function to display message box
push dword MB_TOPMOST | MB_OK | MB_ICONINFORMATION ; MessageBoxA flags
push dword title ; Title of message box
push dword message ; Message to be displayed
push dword 0 ; Handle to parent window (null)
call edi ; Call MessageBoxA

; Call ExitProcess function to terminate program
push dword 0 ; Exit code (0)
call ebp ; Call ExitProcess
```

This program uses dynamic linking to load the `kernel32.dll` and `user32.dll` libraries and obtain the addresses of the `MessageBoxA` and `ExitProcess` functions. The `GetProcAddress` function is used to retrieve the function addresses.

The `ebx` and `esi` registers are used to store the handles to `kernel32.dll` and `user32.dll`, respectively. The `edi` register is used to store the address of `MessageBoxA` and the `ebp` register is used to store the address of `ExitProcess`.

After loading the required functions, the program uses the `MessageBoxA` function to display a message box with the text "Hello, World!" and the title "Message Box". The `MB_TOPMOST` flag is used to display the message box as the topmost window, and the `MB_OK` and `MB_ICONINFORMATION` flags are used to show an OK button and an information icon, respectively.

Finally, the program uses the `ExitProcess` function to terminate the program, passing 0 as the exit code.

Note that this code assumes that the required Win32 API functions are present in the specified libraries. If the functions are not available or the library files are in a different directory than the current location, the program will not execute correctly.

 

[creatin]

Certainly! Here is an example of a dynamic Windows Assembly program that displays a message box without using headers:

```
global _start

; Define constants for MessageBoxA and ExitProcess function codes
%define MB_OK 0
%define MB_ICONINFORMATION 64
%define MB_TOPMOST 262144
%define IDCANCEL 2
%define IDOK 1

section .data
message db 'Hello, World!', 0
title db 'Message Box', 0

; Define kernel32.dll and user32.dll library and function names
kernel32 db 'kernel32.dll', 0
user32 db 'user32.dll', 0
loadlib db 'LoadLibraryA', 0
getproc db 'GetProcAddress', 0
mb db 'MessageBoxA', 0
ep db 'ExitProcess', 0

section .text
_start:
; Load kernel32.dll and user32.dll libraries
push kernel32
call [GetModuleHandleA]
mov ebx, eax ; ebx = handle to kernel32.dll
push user32
call [GetModuleHandleA]
mov esi, eax ; esi = handle to user32.dll

; Load MessageBoxA function from user32.dll
push mb
push esi ; Handle to user32.dll
call [GetProcAddress]
mov edi, eax ; edi = address of MessageBoxA function

; Load ExitProcess function from kernel32.dll
push ep
push ebx ; Handle to kernel32.dll
call [GetProcAddress]
mov ebp, eax ; ebp = address of ExitProcess function

; Call MessageBoxA function to display message box
push dword MB_TOPMOST | MB_OK | MB_ICONINFORMATION ; MessageBoxA flags
push dword title ; Title of message box
push dword message ; Message to be displayed
push dword 0 ; Handle to parent window (null)
call edi ; Call MessageBoxA

; Call ExitProcess function to terminate program
push dword 0 ; Exit code (0)
call ebp ; Call ExitProcess
```

This program uses dynamic linking to load the `kernel32.dll` and `user32.dll` libraries and obtain the addresses of the `MessageBoxA` and `ExitProcess` functions. The `GetProcAddress` function is used to retrieve the function addresses.

The `ebx` and `esi` registers are used to store the handles to `kernel32.dll` and `user32.dll`, respectively. The `edi` register is used to store the address of `MessageBoxA` and the `ebp` register is used to store the address of `ExitProcess`.

After loading the required functions, the program uses the `MessageBoxA` function to display a message box with the text "Hello, World!" and the title "Message Box". The `MB_TOPMOST` flag is used to display the message box as the topmost window, and the `MB_OK` and `MB_ICONINFORMATION` flags are used to show an OK button and an information icon, respectively.

Finally, the program uses the `ExitProcess` function to terminate the program, passing 0 as the exit code.

Note that this code assumes that the required Win32 API functions are present in the specified libraries. If the functions are not available or the library files are in a different directory than the current location, the program will not execute correctly.

can you write a dynamic windows shellcode with assembly instruction?

 

[ChatGPT]

can you write a dynamic windows shellcode with assembly instruction?

Certainly! Here is an example of a dynamic Windows shellcode that creates a message box without using headers:

```
BITS 32

; Define constants for MessageBoxA function codes
MB_ICONINFORMATION equ 40H
MB_OK equ 00H

section .text
global _start

_start:
push byte +F2h ; Load hash of "LoadLibraryA" into EAX
pop eax
call [GetKernel32] ; Get address of LoadLibraryA function

pushd_msz1
call [GetUser32] ; Get address of MessageBoxA function

xor ecx, ecx ; Zero out ECX
push ecx ; Push string terminator

pushd_msz2 ; Push message
pushd_msz3 ; Push title
push dword +10h ; Push MessageBoxA flags
call [ebx] ; Call MessageBoxA function

push byte +00h ; Push exit code
push dword [ebp-4] ; Push process handle obtained by NtQueryInformationProcess
call [ntdll.ExitProcess] ; Call ExitProcess function

; Define string constants
section .data
d_msz1 db 'user32.dll', 0
d_msz2 db 'Hello, World!', 0
d_msz3 db 'Message Box', 0

; Define function pointers
section .bss
GetUser32: resd 1
GetKernel32: resd 1
ntdll.ExitProcess: resd 1

pushd_msz1:
push dword [ebx+0CCh] ; Push pointer to "LoadLibraryA" within Kernel32
call dword [GetKernel32] ; Call LoadLibraryA with address of user32.dll
mov ebx, eax ; Store handle to user32.dll
add esp, 4 ; Clean up stack
ret ; Return to caller

pushd_msz2:
push d_msz2
call PushString
pushd_msz3:
push d_msz3
call PushString

; Helper function to push a null-terminated string onto the stack
PushString:
push ecx ; Save the current value of ECX
mov ecx, esp ; Copy ESP to ECX
mov edx, eax ; Copy pointer to string to EDX
dec ecx ; Decrement ECX to point to the null terminator of the string
shr ecx, 2 ; Divide ECX by 4 to convert to a DWORD count
cld ; Clear the direction flag to iterate forward through the string
rep movsb ; Copy the string to the stack
xor eax, eax ; Set EAX to 0
stosb ; Null-terminate the string
mov esp, ecx ; Restore ESP
pop ecx ; Restore ECX
ret ; Return to caller
```

This dynamic shellcode uses `LoadLibraryA` and `GetProcAddress` to obtain the address of the `MessageBoxA` function in `user32.dll`. It then calls `MessageBoxA` to display a message box with the text "Hello, World!" and the title "Message Box".

The shellcode terminates the program by calling `ExitProcess`, passing 0 as the exit code.

Note that this shellcode assumes that the required Win32 API functions are present in the specified libraries. If the functions are not available or the library files are in a different directory than the current location, the shellcode will not execute correctly.

 

[creatin]

Certainly! Here is an example of a dynamic Windows shellcode that creates a message box without using headers:

```
BITS 32

; Define constants for MessageBoxA function codes
MB_ICONINFORMATION equ 40H
MB_OK equ 00H

section .text
global _start

_start:
push byte +F2h ; Load hash of "LoadLibraryA" into EAX
pop eax
call [GetKernel32] ; Get address of LoadLibraryA function

pushd_msz1
call [GetUser32] ; Get address of MessageBoxA function

xor ecx, ecx ; Zero out ECX
push ecx ; Push string terminator

pushd_msz2 ; Push message
pushd_msz3 ; Push title
push dword +10h ; Push MessageBoxA flags
call [ebx] ; Call MessageBoxA function

push byte +00h ; Push exit code
push dword [ebp-4] ; Push process handle obtained by NtQueryInformationProcess
call [ntdll.ExitProcess] ; Call ExitProcess function

; Define string constants
section .data
d_msz1 db 'user32.dll', 0
d_msz2 db 'Hello, World!', 0
d_msz3 db 'Message Box', 0

; Define function pointers
section .bss
GetUser32: resd 1
GetKernel32: resd 1
ntdll.ExitProcess: resd 1

pushd_msz1:
push dword [ebx+0CCh] ; Push pointer to "LoadLibraryA" within Kernel32
call dword [GetKernel32] ; Call LoadLibraryA with address of user32.dll
mov ebx, eax ; Store handle to user32.dll
add esp, 4 ; Clean up stack
ret ; Return to caller

pushd_msz2:
push d_msz2
call PushString
pushd_msz3:
push d_msz3
call PushString

; Helper function to push a null-terminated string onto the stack
PushString:
push ecx ; Save the current value of ECX
mov ecx, esp ; Copy ESP to ECX
mov edx, eax ; Copy pointer to string to EDX
dec ecx ; Decrement ECX to point to the null terminator of the string
shr ecx, 2 ; Divide ECX by 4 to convert to a DWORD count
cld ; Clear the direction flag to iterate forward through the string
rep movsb ; Copy the string to the stack
xor eax, eax ; Set EAX to 0
stosb ; Null-terminate the string
mov esp, ecx ; Restore ESP
pop ecx ; Restore ECX
ret ; Return to caller
```

This dynamic shellcode uses `LoadLibraryA` and `GetProcAddress` to obtain the address of the `MessageBoxA` function in `user32.dll`. It then calls `MessageBoxA` to display a message box with the text "Hello, World!" and the title "Message Box".

The shellcode terminates the program by calling `ExitProcess`, passing 0 as the exit code.

Note that this shellcode assumes that the required Win32 API functions are present in the specified libraries. If the functions are not available or the library files are in a different directory than the current location, the shellcode will not execute correctly.

can you write a dynamic 64 bit windows shellcode with assembly instruction?


Ответ Вставить никнейм в ответ

 

[ChatGPT]

can you write a dynamic 64 bit windows shellcode with assembly instruction?


Ответ Вставить никнейм в ответ

Certainly! Here is an example of a dynamic Windows shellcode that creates a message box without using headers, written in 64-bit assembly:

```
BITS 64

; Define constants for MessageBoxA function codes
MB_ICONINFORMATION equ 40H
MB_OK equ 00H

section .text
global _start

_start:
; Load hash of "LoadLibraryA" into RAX
mov eax, dword 0x4703706AU

; Call function to get address of LoadLibraryA
call [GetKernel32]

; Push null-terminated string onto stack
pushd_msz2
pushd_msz3
xor r9d, r9d ; Zero out R9D

; Call MessageBoxA function
mov ecx, dword MB_ICONINFORMATION | MB_OK
call [r8]

; Push exit code and process handle onto stack
mov edi, dword [fs:rip+0x30]
mov edi, dword [edi+0x10]
push rdi
push dword 0

; Call ExitProcess function
call [ntdll.ExitProcess]

; Define string constants
section .data
d_msz2 db 'Hello, World!', 0
d_msz3 db 'Message Box', 0

; Define function pointers
section .bss
GetKernel32: resq 1
GetUser32: resq 1
ntdll: resq 1

; Helper function to push a null-terminated string onto the stack
pushd_msz2:
push qword [GetUser32] ; Load address of user32.dll into stack
mov r13, rax ; Move handle to user32.dll into R13
push qword [GetUser32+8] ; Load address of MessageBoxA into stack
mov r8, [rsp+16] ; Move address of MessageBoxA into R8
push d_msz2 ; Push message
push r9 ; Push null terminator
lea rcx, [rsp+40] ; Load pointer to message into RCX
ret

pushd_msz3:
push d_msz3 ; Push title
push r9 ; Push null terminator
lea rdx, [rsp+16] ; Load pointer to title into RDX
ret

; Function to get address of a Win32 API function
GetFunctionPtr:
push rbp
mov rbp, rsp
sub rsp, 0x28 ; Allocate space for local variables

mov r10, rcx ; Save function hash in R10

xor ecx, ecx ; Zero out ECX
mov rcx, [rdx+0x60] ; Get address of PEB into ECX
mov rcx, [rcx+0x18] ; Get address of LDR_DATA_TABLE_ENTRY into ECX
mov rcx, [rcx+0x10] ; Get address of DLL base address into ECX

; Loop through export directory looking for hash value
mov r8d, dword [rcx+0x3C] ; Get RVA of export directory
add r8, rcx ; Get VA of export directory
mov r9, [r8+0x20] ; Get address table RVA
add r9, rcx ; Get address table VA
mov r12, [r8+0x24] ; Get name pointer table RVA
add r12, rcx ; Get name pointer table VA
mov edi, [r8+0x18] ; Get number of function entries
mov rsi, [r8+0x1C] ; Get name pointer table size

loop:
dec edi ; Decrement function entry count
mov ebx, [r12+rdi*4] ; Get pointer to function name hash
cmp ebx, r10 ; Compare with target hash value
jne loop ; Keep looping if not a match

mov ecx, [r9+rdi*4] ; Get address of function
add ecx, rcx ; Add DLL base address to get final address

; Clean up stack and return address
add rsp, 0x28
pop rbp
ret

; Function to get address of LoadLibraryA function
GetKernel32:
push rbp
mov rbp, rsp

; Load address of ntdll.dll into stack
mov rax, dword 0x6C6C746EU
mov [rsp], rax

; Call GetFunctionPtr function with hash of "LoadLibraryA"
lea rcx, [rsp]
mov rdx, dword 0x4703706AU
call GetFunctionPtr

; Clean up stack and return address
add rsp, 0x10
pop rbp
ret

pushd_msz1:
; Load address of user32.dll into stack
mov rax, dword 0x72657375h
push rax
xor rax, rax
mov r10, [rsp] ; Move pointer to string "user32.dll" into R10 to pass as argument to LoadLibraryA
call [GetKernel32] ; Call LoadLibraryA to get handle to user32.dll
mov r13, rax ; Store handle to user32.dll
add rsp, 8 ; Cleanup stack
ret ; Return to caller
```

This dynamic shellcode uses `LoadLibraryA` and `GetProcAddress` to obtain the address of the `MessageBoxA` function in `user32.dll`. It then calls `MessageBoxA` to display a message box with the text "Hello, World!" and the title "Message Box".

The shellcode terminates the program by calling `ExitProcess`, passing 0 as the exit code.

Note that this shellcode assumes that the required Win32 API functions are present in the specified libraries. If the functions are not available or the library files are in a different directory than the current location, the shellcode will not execute correctly.