Function at 0x4033d7
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, 0x2d4
push ebx
push esi
push edi
push 0x20
pop edi
xor ebx, ebx
push 0x8001
mov dword [esp + 0x14], ebx
mov dword [esp + 0x10], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x1c], ebx
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
call dword [sym.imp.KERNEL32.dll_GetVersion]
and eax, 0xbfffffff
cmp ax, 6
mov dword [0x7a8a4c], eax
je 0x403427
push ebx
call fcn.004066e6
cmp eax, ebx
je 0x403427
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00406676
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], 0
jne 0x40342c
push 0xa
call fcn.004066e6
push 8
call fcn.004066e6
push 6
mov dword [0x7a8a44], eax
call fcn.004066e6
cmp eax, ebx
je 0x40346f
push 0x1e
call eax
test eax, eax
je 0x40346f
or byte [0x7a8a4f], 0x40
push ebp
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x7a8b18], eax
push ebx
lea eax, [esp + 0x34]
push 0x2b4
push eax
push ebx
push 0x79fee8
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x7a7a40
call fcn.0040630c
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov ebp, 0x7b3000
push eax
push ebp
call fcn.0040630c
cmp word [0x7b3000], 0x22
mov dword [0x7a8a40], 0x400000
mov eax, ebp
jne 0x4034d8
push 0x22
mov eax, 0x7b3002
pop edi
push edi
push eax
call fcn.00405c0e
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov ecx, eax
mov dword [esp + 0x18], ecx
mov ax, word [ecx]
cmp ax, bx
je 0x403609
push 0x20
pop ebx
cmp ax, bx
jne 0x403507
inc ecx
inc ecx
cmp word [ecx], bx
je 0x403500
cmp word [ecx], 0x22
jne 0x403512
inc ecx
push 0x22
inc ecx
pop ebx
cmp word [ecx], 0x2f
jne 0x4035d5
inc ecx
inc ecx
cmp word [ecx], 0x53
jne 0x40353d
mov ax, word [ecx + 2]
cmp ax, 0x20
je 0x403533
test ax, ax
jne 0x40353d
mov dword [0x7a8b00], 1
movzx eax, word [0x40a2c2]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40a2c0]
cdq
movzx edx, word [str.NCRC]
or edi, eax
movzx eax, word [0x40a2be]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx]
or edi, edx
cmp eax, esi
jne 0x403593
mov eax, dword [ecx + 4]
cmp eax, edi
jne 0x403593
mov ax, word [ecx + 8]
cmp ax, 0x20
je 0x40358e
test ax, ax
jne 0x403593
or dword [esp + 0x1c], 4
movzx eax, word [0x40a2b6]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40a2b4]
cdq
movzx edx, word [str.__D]
or edi, eax
movzx eax, word [0x40a2b2]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx - 4]
or edi, edx
cmp eax, esi
jne 0x4035d5
mov eax, dword [ecx]
cmp eax, edi
je 0x4035f4
push ebx
push ecx
call fcn.00405c0e
mov ecx, eax
cmp word [ecx], 0x22
jne 0x4035e6
inc ecx
inc ecx
mov ax, word [ecx]
test ax, ax
jne 0x4034f8
jmp 0x403607
and word [ecx - 4], 0
add ecx, 4
push ecx
push 0x7b3800
call fcn.0040630c
xor ebx, ebx
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
mov edi, 0x7b5800
push edi
push 0x400
call esi
call fcn.004033a6
test eax, eax
jne 0x40367b
push 0x3fb
push edi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push edi
call sub.KERNEL32.dll_lstrcatW
call fcn.004033a6
test eax, eax
jne 0x40367b
push edi
push 0x3fc
call esi
push 0x40a29c
push edi
call sub.KERNEL32.dll_lstrcatW
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push edi
push str.TEMP
call esi
push edi
push 0x40a288
call esi
call fcn.004033a6
test eax, eax
je 0x403746
push 0x7b5000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push dword [esp + 0x1c]
call fcn.00402f4a
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403746
cmp dword [0x7a8a60], ebx
je 0x403736
push ebx
push ebp
call fcn.00405c0e
mov esi, eax
cmp esi, ebp
jb 0x403700
movzx eax, word [0x40a282]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov ebx, eax
movzx eax, word [0x40a280]
movzx ecx, word [0x40a27c]
cdq
or ebx, eax
movzx eax, word [0x40a27e]
shl eax, 0x10
or eax, ecx
xor ecx, ecx
cdq
or ecx, eax
mov eax, ebx
or eax, edx
mov edx, dword [esi]
cmp edx, ecx
jne 0x4036f8
mov edx, dword [esi + 4]
cmp edx, eax
je 0x4036fe
dec esi
dec esi
cmp esi, ebp
jae 0x4036eb
xor ebx, ebx
cmp esi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x403772
mov word [esi], bx
add esi, 8
push esi
call fcn.00405ce9
test eax, eax
je 0x403746
push esi
push 0x7b3800
call fcn.0040630c
push esi
push 0x7b4000
call fcn.0040630c
mov dword [esp + 0x10], ebx
or dword [0x7a8b0c], 0xffffffff
call fcn.004039f2
mov dword [esp + 0x14], eax
call fcn.00403918
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x40387c
push 0x200010
push dword [esp + 0x10]
call fcn.00405972
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.004058dd
push 0x40a270
push edi
mov esi, eax
call sub.KERNEL32.dll_lstrcatW
cmp esi, ebx
je 0x403793
push 0x40a26c
push edi
call sub.KERNEL32.dll_lstrcatW
push str..tmp
push edi
call sub.KERNEL32.dll_lstrcatW
mov ebp, 0x7b4800
push ebp
push edi
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x403746
cmp esi, ebx
push edi
je 0x4037bb
call fcn.00405843
jmp 0x4037c0
call fcn.004058c0
push edi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
cmp word [0x7b3800], bx
jne 0x4037db
push ebp
push 0x7b3800
call fcn.0040630c
push dword [esp + 0x18]
push section..ndata
call fcn.0040630c
movzx eax, word [0x40a25a]
movzx ecx, word [0x40a258]
shl eax, 0x10
or eax, ecx
push 0x1a
mov dword [0x7a9800], eax
pop ebp
mov esi, 0x79f6e8
mov eax, dword [0x7a8a54]
push dword [eax + 0x120]
push esi
call fcn.0040632e
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
cmp dword [esp + 0x10], ebx
je 0x403866
push 1
push esi
push 0x7b6800
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x403866
push ebx
push esi
call fcn.004060d2
mov eax, dword [0x7a8a54]
push dword [eax + 0x124]
push esi
call fcn.0040632e
push esi
call fcn.004058f5
cmp eax, ebx
je 0x403866
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc word [0x7a9800]
dec ebp
jne 0x403809
push ebx
push edi
call fcn.004060d2
jmp 0x403746
cmp dword [0x7a8af4], ebx
je 0x403900
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 0x4038d0
lea eax, [esp + 0x20]
push eax
push str.SeShutdownPrivilege
push ebx
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
push ebx
push ebx
lea eax, [esp + 0x24]
push ebx
push eax
push ebx
push dword [esp + 0x28]
mov dword [esp + 0x34], 1
mov dword [esp + 0x40], 2
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.004066e6
cmp eax, ebx
mov esi, 0x80040002
je 0x4038ec
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x4038f9
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403900
push 9
call fcn.0040140b
mov eax, dword [0x7a8b0c]
cmp eax, 0xffffffff
je 0x40390e
mov dword [esp + 0x10], eax
push dword [esp + 0x10]
call dword [sym.imp.KERNEL32.dll_ExitProcess]