Function at 0x403257
Capabilities:
Accept command line arguments
Copy file
Create directory
Delete file
Get common file path
Get file system object information
Set current directory
Shutdown system
Terminate process

Disassembly:
sub esp, 0x184
push ebx
push ebp
push esi
xor ebx, ebx
push edi
mov dword [esp + 0x1c], ebx
mov dword [esp + 0x10], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x18], ebx
mov byte [esp + 0x14], 0x20
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push 0x8001
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
push 8
mov dword [0x43e9b8], eax
call fcn.004058f5
push ebx
push 0x160
mov dword [0x43e8c0], eax
lea eax, [esp + 0x3c]
push eax
push ebx
push 0x40840f
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x43c8c0
call fcn.00405804
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
push eax
mov edi, 0x453000
push edi
call fcn.00405804
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x453000], 0x22
mov dword [0x43e8c8], eax
mov eax, edi
jne 0x4032fa
mov byte [esp + 0x14], 0x22
mov eax, 0x453001
push dword [esp + 0x14]
push eax
call fcn.00405541
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov esi, eax
mov dword [esp + 0x20], esi
jmp 0x403398
cmp al, 0x20
jne 0x403320
inc esi
cmp byte [esi], 0x20
je 0x40331a
cmp byte [esi], 0x22
mov byte [esp + 0x14], 0x20
jne 0x403330
inc esi
mov byte [esp + 0x14], 0x22
cmp byte [esi], 0x2f
jne 0x403386
inc esi
cmp byte [esi], 0x53
jne 0x40334b
mov al, byte [esi + 1]
cmp al, 0x20
je 0x403346
cmp al, bl
jne 0x40334b
or dword [esp + 0x18], 2
push 4
pop ebp
push ebp
push str.NCRC
push esi
call fcn.004031dd
add esp, 0xc
test eax, eax
jne 0x403370
mov al, byte [esi + 4]
cmp al, 0x20
je 0x40336c
cmp al, bl
jne 0x403370
or dword [esp + 0x18], ebp
push ebp
lea eax, [esi - 2]
push str.__D
push eax
call fcn.004031dd
add esp, 0xc
test eax, eax
je 0x4033a4
push dword [esp + 0x14]
push esi
call fcn.00405541
mov esi, eax
cmp byte [esi], 0x22
jne 0x403398
inc esi
mov al, byte [esi]
cmp al, bl
jne 0x403316
jmp 0x4033c0
push ebp
lea eax, [esi - 2]
push ebx
push eax
call fcn.00407773
add esp, 0xc
add esi, 2
push esi
push 0x454000
call fcn.00405804
mov ebp, 0x458000
push ebp
push 0x1000
call dword [sym.imp.KERNEL32.dll_GetTempPathA]
call fcn.004031a9
test eax, eax
jne 0x4033fe
push 0xffb
push ebp
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push ebp
call sub.KERNEL32.dll_lstrcatA
call fcn.004031a9
test eax, eax
je 0x40348b
push 0x457000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x18]
call fcn.00402f64
mov dword [esp + 0x10], eax
cmp eax, ebx
jne 0x40348b
cmp dword [0x43e924], ebx
je 0x40347b
push ebx
push edi
call fcn.00405541
mov esi, eax
jmp 0x403442
push 4
push str.___
push esi
call fcn.004031dd
add esp, 0xc
test eax, eax
je 0x403446
dec esi
cmp esi, edi
jae 0x40342d
mov dword [esp + 0x10], str.Error_launching_installer
cmp esi, edi
jb 0x4034b6
mov byte [esi], bl
add esi, 4
push esi
call fcn.00405dc2
test eax, eax
je 0x40348b
push esi
push 0x454000
call fcn.00405804
push esi
push 0x455000
call fcn.00405804
mov dword [esp + 0x10], ebx
or dword [0x43e9ac], 0xffffffff
call fcn.004051ac
mov dword [esp + 0x1c], eax
call fcn.0040322d
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
je 0x40358b
push 0x200010
push dword [esp + 0x14]
call fcn.004054db
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
push str.nsu.tmp
push ebp
call sub.KERNEL32.dll_lstrcatA
mov esi, 0x456000
push esi
push ebp
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x40348b
push ebx
push ebp
call dword [sym.imp.KERNEL32.dll_CreateDirectoryA]
push ebp
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x454000], bl
jne 0x4034f4
push esi
push 0x454000
call fcn.00405804
push dword [esp + 0x20]
push section..ndata
call fcn.00405804
push 0x4083d4
push 0x440000
call fcn.00405804
push 0x1a
pop edi
mov esi, 0x42d4f8
mov eax, dword [0x43e8cc]
push dword [eax + 0x120]
push esi
call fcn.00405e44
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x403576
push 1
push esi
push 0x45a000
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x403576
push ebx
push esi
call fcn.0040622e
mov eax, dword [0x43e8cc]
push dword [eax + 0x124]
push esi
call fcn.00405e44
push esi
call fcn.0040547a
cmp eax, ebx
je 0x403576
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x440000]
dec edi
jne 0x403519
push ebx
push ebp
call fcn.0040622e
jmp 0x40348b
cmp dword [0x43e994], ebx
je 0x40360e
push 3
call fcn.004058f5
push 4
mov ebp, eax
call fcn.004058f5
push 5
mov esi, eax
call fcn.004058f5
mov edi, eax
cmp ebp, ebx
je 0x4035fa
cmp esi, ebx
je 0x4035fa
cmp edi, ebx
je 0x4035fa
lea eax, [esp + 0x20]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call ebp
test eax, eax
je 0x4035fa
lea eax, [esp + 0x28]
push eax
push str.SeShutdownPrivilege
push ebx
call esi
push ebx
push ebx
push ebx
lea eax, [esp + 0x30]
push eax
push ebx
push dword [esp + 0x34]
mov dword [esp + 0x3c], 1
mov dword [esp + 0x48], 2
call edi
push ebx
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x40360e
push 9
call fcn.0040141a
mov eax, dword [0x43e9ac]
cmp eax, 0xffffffff
je 0x40361c
mov dword [esp + 0x1c], eax
push dword [esp + 0x1c]
jmp 0x4034b0