Function at 0x403dd3
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, 0x180
push ebx
push ebp
push esi
xor ebx, ebx
push edi
mov dword [esp + 0x18], ebx
mov dword [esp + 0x10], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
xor esi, esi
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 [0x425f78], eax
call fcn.00407b6b
mov dword [0x425ee4], eax
push ebx
lea eax, [esp + 0x34]
push 0x160
push eax
push ebx
push 0x421880
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x4256e0
call fcn.00407847
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov edi, 0x42b000
push eax
push edi
call fcn.00407847
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x42b000], 0x22
mov dword [0x425ee0], eax
mov eax, edi
jne 0x403e74
mov byte [esp + 0x14], 0x22
mov eax, 0x42b001
push dword [esp + 0x14]
push eax
call fcn.004073f9
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x403eee
cmp cl, 0x20
jne 0x403e96
inc eax
cmp byte [eax], 0x20
je 0x403e90
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x403ea6
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x403ede
inc eax
cmp byte [eax], 0x53
jne 0x403ebf
mov cl, byte [eax + 1]
or cl, 0x20
cmp cl, 0x20
jne 0x403ebf
or esi, 2
cmp dword [eax], 0x4352434e
jne 0x403ed5
mov cl, byte [eax + 4]
or cl, 0x20
cmp cl, 0x20
jne 0x403ed5
or esi, 8
cmp dword [eax - 2], 0x3d442f20
je 0x403ef6
push dword [esp + 0x14]
push eax
call fcn.004073f9
cmp byte [eax], 0x22
jne 0x403eee
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x403e8b
jmp 0x403f07
mov dword [eax - 2], ebx
add eax, 2
push eax
push 0x42b400
call fcn.00407847
mov ebp, 0x42c400
push ebp
push 0x400
call dword [sym.imp.KERNEL32.dll_GetTempPathA]
call fcn.00403d9f
test eax, eax
jne 0x403f41
push 0x3fb
push ebp
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push ebp
call sub.KERNEL32.dll_lstrcatA
call fcn.00403d9f
test eax, eax
je 0x403fbf
push 0x42c000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push esi
call fcn.00402d21
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403fbf
cmp dword [0x425efc], ebx
je 0x403faf
push ebx
push edi
call fcn.004073f9
mov esi, eax
jmp 0x403f76
cmp dword [esi], 0x3d3f5f20
je 0x403f7a
dec esi
cmp esi, edi
jae 0x403f6d
cmp esi, edi
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x403fea
mov byte [esi], bl
add esi, 4
push esi
call fcn.004074af
test eax, eax
je 0x403fbf
push esi
push 0x42b400
call fcn.00407847
push esi
push 0x42b800
call fcn.00407847
mov dword [esp + 0x10], ebx
or dword [0x425f6c], 0xffffffff
call fcn.004054fb
mov dword [esp + 0x18], eax
call fcn.00404154
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
je 0x4040b9
push 0x200010
push dword [esp + 0x14]
call fcn.0040719c
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
push str.nsu.tmp
push ebp
call sub.KERNEL32.dll_lstrcatA
mov esi, 0x42bc00
push esi
push ebp
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x403fbf
push ebx
push ebp
call dword [sym.imp.KERNEL32.dll_CreateDirectoryA]
push ebp
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x42b400], bl
jne 0x404028
push esi
push 0x42b400
call fcn.00407847
push dword [esp + 0x1c]
push section..ndata
call fcn.00407847
push 0x1a
mov word [0x426400], 0x41
pop edi
mov esi, 0x421480
mov eax, dword [0x425ef0]
push dword [eax + 0x10c]
push esi
call fcn.00407869
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x4040a4
push 1
push esi
push 0x42cc00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x4040a4
push ebx
push esi
call fcn.00407637
mov eax, dword [0x425ef0]
push dword [eax + 0x110]
push esi
call fcn.00407869
push esi
call fcn.0040713b
cmp eax, ebx
je 0x4040a4
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x426400]
dec edi
jne 0x404047
push ebx
push ebp
call fcn.00407637
jmp 0x403fbf
cmp dword [0x425f54], ebx
je 0x40413c
push 3
call fcn.00407b6b
push 4
mov ebp, eax
call fcn.00407b6b
push 5
mov esi, eax
call fcn.00407b6b
cmp ebp, ebx
mov edi, eax
je 0x404128
cmp esi, ebx
je 0x404128
cmp edi, ebx
je 0x404128
lea eax, [esp + 0x1c]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call ebp
test eax, eax
je 0x404128
lea eax, [esp + 0x24]
push eax
push str.SeShutdownPrivilege
push ebx
call esi
push ebx
push ebx
lea eax, [esp + 0x28]
push ebx
push eax
push ebx
push dword [esp + 0x30]
mov dword [esp + 0x38], 1
mov dword [esp + 0x44], 2
call edi
push ebx
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x40413c
push 9
call fcn.004012fc
mov eax, dword [0x425f6c]
cmp eax, 0xffffffff
je 0x40414a
mov dword [esp + 0x18], eax
push dword [esp + 0x18]
call dword [sym.imp.KERNEL32.dll_ExitProcess]