Function at 0x403804
Capabilities:
Accept command line arguments
Check os version
Copy file
Delete file
Get common file path
Get file system object information
Set current directory
Set environment variable
Shutdown system
Terminate process

Disassembly:
sub esp, 0x3f0
push ebx
push ebp
push esi
push edi
xor ebx, ebx
mov edi, str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
push 0x8001
mov ebp, ebx
mov dword [esp + 0x14], ebx
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
mov esi, dword [sym.imp.KERNEL32.dll_GetVersionExW]
lea eax, [esp + 0x30]
xorps xmm0, xmm0
mov dword [esp + 0x44], ebx
push eax
movlpd qword [esp + 0x148], xmm0
mov dword [esp + 0x34], 0x11c
call esi
test eax, eax
jne 0x403886
lea eax, [esp + 0x30]
mov dword [esp + 0x30], 0x114
push eax
call esi
push 0x53
pop eax
mov dl, 4
mov byte [esp + 0x14a], dl
cmp word [esp + 0x44], ax
jne 0x403882
mov eax, dword [esp + 0x5e]
add eax, 0xffffffd0
mov word [esp + 0x144], ax
jmp 0x40388d
xor eax, eax
jmp 0x403878
mov dl, byte [esp + 0x14a]
cmp dword [esp + 0x34], 0xa
jae 0x40389f
movzx eax, word [esp + 0x3c]
mov dword [esp + 0x3c], eax
jmp 0x4038a3
mov eax, dword [esp + 0x3c]
mov dword [0x429e38], eax
movzx eax, byte [esp + 0x34]
shl ax, 8
movzx ecx, ax
movzx eax, byte [esp + 0x38]
or ecx, eax
movzx eax, byte [esp + 0x144]
shl ax, 8
shl ecx, 0x10
movzx eax, ax
or ecx, eax
movzx eax, dl
or ecx, eax
mov eax, 0x600
mov dword [0x429e3c], ecx
sar ecx, 0x10
cmp cx, ax
je 0x4038f8
push ebx
call fcn.004069fb
test eax, eax
je 0x4038f8
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.004062b3
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
inc esi
add esi, eax
cmp byte [esi], bl
jne 0x4038fd
push 0xc
call fcn.004069fb
push 0xa
call fcn.004069fb
push 8
mov dword [0x428d30], eax
call fcn.004069fb
test eax, eax
je 0x40393e
push 0x1e
call eax
test eax, eax
je 0x40393e
or byte [0x429e3c], 0x80
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
push ebx
push 0x2b4
mov dword [0x429da0], eax
lea eax, [esp + 0x154]
push eax
push ebx
push 0x4085d4
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x428d40
call fcn.00406c2f
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
push eax
push 0x434000
call fcn.00406c2f
movzx ecx, word [0x434000]
mov edx, 0x434002
push 0x22
pop esi
push 0x20
pop ebx
cmp cx, si
mov dword [0x428d34], 0x400000
mov eax, esi
mov dword [esp + 0x18], esi
cmovne eax, ebx
movzx eax, ax
push eax
mov eax, 0x434000
cmove eax, edx
push eax
call fcn.0040670b
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov ecx, eax
mov dword [esp + 0x1c], ecx
movzx eax, word [ecx]
test ax, ax
je 0x403ab4
mov esi, eax
movzx eax, si
cmp si, bx
jne 0x4039f2
add ecx, 2
movzx eax, word [ecx]
cmp ax, bx
je 0x4039e7
movzx esi, ax
movzx edx, ax
cmp ax, word [esp + 0x18]
jne 0x403a08
movzx edx, word [ecx + 2]
push 0x22
pop eax
mov ebx, eax
cmp si, word [esp + 0x18]
lea eax, [ecx + 2]
cmovne eax, ecx
cmp dx, 0x2f
jne 0x403a74
push 0x53
add eax, 2
pop ecx
push 0x20
pop edx
cmp word [eax], cx
jne 0x403a3f
movzx ecx, word [eax + 2]
cmp cx, dx
je 0x403a35
test cx, cx
jne 0x403a3f
mov dword [0x429e20], 1
cmp dword [eax], 0x43004e
jne 0x403a63
cmp dword [eax + 4], 0x430052
jne 0x403a63
movzx ecx, word [eax + 8]
cmp cx, dx
je 0x403a5e
test cx, cx
jne 0x403a63
or dword [esp + 0x10], 4
cmp dword [eax - 4], 0x2f0020
jne 0x403a74
cmp dword [eax], 0x3d0044
je 0x403aa0
push ebx
push eax
call fcn.0040670b
mov ecx, eax
push 0x22
pop ebx
movzx eax, word [ecx]
mov edx, eax
cmp ax, bx
jne 0x403a90
add ecx, 2
movzx edx, word [ecx]
movzx esi, dx
test dx, dx
je 0x403ab4
push 0x20
pop ebx
jmp 0x4039df
xor ecx, ecx
mov word [eax - 4], cx
add eax, 4
push eax
push 0x434800
call fcn.00406c2f
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
mov ebx, 0x436800
push ebx
push 0x400
call esi
call fcn.00403da8
test eax, eax
jne 0x403b26
push 0x3fb
push ebx
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push ebx
call sub.KERNEL32.dll_lstrcatW
call fcn.00403da8
test eax, eax
jne 0x403b26
push ebx
push 0x3fc
call esi
push 0x4085fc
push ebx
call sub.KERNEL32.dll_lstrcatW
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push ebx
push str.TEMP
call esi
push ebx
push 0x408610
call esi
call fcn.00403da8
test eax, eax
je 0x403bb7
mov ebx, dword [sym.imp.KERNEL32.dll_DeleteFileW]
push 0x436000
call ebx
push dword [esp + 0x10]
call fcn.0040348f
mov edi, eax
test edi, edi
jne 0x403bb7
cmp dword [0x429d44], ebp
je 0x403ba9
push eax
push 0x434000
call fcn.0040670b
mov esi, eax
mov eax, 0x434000
jmp 0x403b72
cmp dword [esi], 0x5f0020
jne 0x403b6f
cmp dword [esi + 4], 0x3d003f
je 0x403b76
sub esi, 2
cmp esi, eax
jae 0x403b5e
mov edi, str.Error_launching_installer
cmp esi, eax
jb 0x403bdf
xor eax, eax
mov word [esi], ax
add esi, 8
push esi
call fcn.0040674d
test eax, eax
je 0x403bb7
push esi
push 0x434800
call fcn.00406c2f
push esi
push 0x435000
call fcn.00406c2f
xor edi, edi
or dword [0x429e2c], 0xffffffff
call fcn.00405b41
mov ebp, eax
xor ebx, ebx
call fcn.004037c2
call dword [sym.imp.ole32.dll_OleUninitialize]
test edi, edi
je 0x403d0f
push 0x200010
push edi
call fcn.00406bbd
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.00406611
push str.nsu
push 0x436800
mov esi, eax
call sub.KERNEL32.dll_lstrcatW
test esi, esi
je 0x403c08
push 0x408624
push 0x436800
call sub.KERNEL32.dll_lstrcatW
push 0x408628
push 0x436800
call sub.KERNEL32.dll_lstrcatW
push 0x435800
push 0x436800
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x403bb7
push 0x436800
test esi, esi
je 0x403c3b
call fcn.00405f41
jmp 0x403c40
call fcn.00405f21
push 0x436800
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
xor eax, eax
cmp word [0x434800], ax
jne 0x403c65
push 0x435800
push 0x434800
call fcn.00406c2f
push dword [esp + 0x1c]
push section..ndata
call fcn.00406c2f
push 0x1a
mov dword [0x42a800], 0x41
xor ebp, ebp
pop esi
mov eax, dword [0x429d50]
push dword [eax + 0x120]
push 0x4209f0
call fcn.00405fbd
push 0x4209f0
call ebx
test edi, edi
je 0x403cef
push 1
push 0x4209f0
push 0x437800
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x403cef
push ebp
push 0x4209f0
call fcn.00406352
mov eax, dword [0x429d50]
push dword [eax + 0x124]
push 0x4209f0
call fcn.00405fbd
push 0x4209f0
call fcn.004067eb
test eax, eax
je 0x403cef
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov edi, ebp
inc word [0x42a800]
sub esi, 1
jne 0x403c82
xor ebx, ebx
push ebx
push 0x436800
call fcn.00406352
mov ebp, ebx
jmp 0x403bb9
cmp dword [0x429e14], 0
je 0x403d94
lea eax, [esp + 0x14]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
test eax, eax
je 0x403d64
lea eax, [esp + 0x24]
push eax
push str.SeShutdownPrivilege
push ebx
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
push ebx
push ebx
push ebx
lea eax, [esp + 0x2c]
mov dword [esp + 0x2c], 1
push eax
push ebx
push dword [esp + 0x28]
mov dword [esp + 0x44], 2
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.004069fb
mov esi, 0x80040002
test eax, eax
je 0x403d80
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x403d8d
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403d94
push 9
call fcn.00401533
cmp dword [0x429e2c], 0xffffffff
cmovne ebp, dword [0x429e2c]
push ebp
jmp 0x403bd9