Function at 0x4039e3
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:
mov edi, edi
push ebp
mov ebp, esp
add byte [ebx + 0x55], dl
push esi
push edi
push 0x20
xor ebp, ebp
pop esi
mov dword [esp + 0x18], ebp
mov dword [esp + 0x10], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x14], ebp
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push 0x8001
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
push ebp
call dword [sym.imp.ole32.dll_OleInitialize]
push 8
mov dword [0x472eb8], eax
call fcn.0040645d
push ebp
push 0x2b4
mov dword [0x472dd0], eax
lea eax, [esp + 0x38]
push eax
push ebp
push 0x40931c
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x46adc0
call fcn.0040616a
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
push eax
mov edi, 0x4c30a0
push edi
call fcn.0040616a
push ebp
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
cmp word [0x4c30a0], 0x22
mov dword [0x472dd8], eax
mov eax, edi
jne 0x403a83
push 0x22
pop esi
mov eax, 0x4c30a2
push esi
push eax
call fcn.00405e66
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov esi, eax
mov dword [esp + 0x1c], esi
jmp 0x403b2a
push 0x20
pop ebx
cmp ax, bx
jne 0x403aac
add esi, 2
cmp word [esi], bx
je 0x403aa4
cmp word [esi], 0x22
jne 0x403ab8
push 0x22
add esi, 2
pop ebx
cmp word [esi], 0x2f
jne 0x403b18
add esi, 2
cmp word [esi], 0x53
jne 0x403ada
movzx eax, word [esi + 2]
cmp eax, 0x20
je 0x403ad5
cmp ax, bp
jne 0x403ada
or dword [esp + 0x14], 2
push 4
push str.NCRC
push esi
call fcn.00403948
add esp, 0xc
test eax, eax
jne 0x403b01
movzx eax, word [esi + 8]
cmp eax, 0x20
je 0x403afc
cmp ax, bp
jne 0x403b01
or dword [esp + 0x14], 4
push 4
lea eax, [esi - 4]
push str.__D
push eax
call fcn.00403948
add esp, 0xc
test eax, eax
je 0x403b38
push ebx
push esi
call fcn.00405e66
mov esi, eax
cmp word [esi], 0x22
jne 0x403b2a
add esi, 2
movzx eax, word [esi]
cmp ax, bp
jne 0x403a9c
jmp 0x403b55
push 8
lea eax, [esi - 4]
push ebp
push eax
call fcn.00407ecf
add esp, 0xc
add esi, 4
push esi
push 0x4c70a8
call fcn.0040616a
mov ebx, 0x4d70c8
push ebx
push 0x2004
call dword [sym.imp.KERNEL32.dll_GetTempPathW]
call fcn.00403914
test eax, eax
jne 0x403b93
push 0x1fff
push ebx
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push ebx
call sub.KERNEL32.dll_lstrcatW
call fcn.00403914
test eax, eax
je 0x403c2c
push 0x4d30c0
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push dword [esp + 0x14]
call fcn.00403679
mov dword [esp + 0x10], eax
cmp eax, ebp
jne 0x403c2c
cmp dword [0x472e24], ebp
je 0x403c15
push ebp
push edi
call fcn.00405e66
mov esi, eax
jmp 0x403bd9
push 4
push 0x4092d4
push esi
call fcn.00403948
add esp, 0xc
test eax, eax
je 0x403bdd
sub esi, 2
cmp esi, edi
jae 0x403bc2
mov dword [esp + 0x10], str.Error_launching_installer
cmp esi, edi
jb 0x403c57
xor eax, eax
mov word [esi], ax
add esi, 8
push esi
call fcn.004068df
test eax, eax
je 0x403c2c
push esi
push 0x4c70a8
call fcn.0040616a
push esi
push 0x4cb0b0
call fcn.0040616a
mov dword [esp + 0x10], ebp
or dword [0x472eac], 0xffffffff
call fcn.00405a8c
push 1
mov dword [esp + 0x1c], eax
call fcn.00406248
call fcn.004039a1
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebp
je 0x403d2e
push 0x200010
push dword [esp + 0x14]
call fcn.00405e00
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
push 0x4092c0
push ebx
call sub.KERNEL32.dll_lstrcatW
mov esi, 0x4cf0b8
push esi
push ebx
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x403c2c
push ebp
push ebx
call dword [sym.imp.KERNEL32.dll_CreateDirectoryW]
push ebx
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
cmp word [0x4c70a8], bp
jne 0x403c96
push esi
push 0x4c70a8
call fcn.0040616a
push dword [esp + 0x1c]
push section..ndata
call fcn.0040616a
push 0x4092bc
push 0x477008
call fcn.0040616a
push 0x1a
pop edi
mov esi, 0x4331f8
mov eax, dword [0x472ddc]
push dword [eax + 0x120]
push esi
call fcn.00406966
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
cmp dword [esp + 0x10], ebp
je 0x403d18
push 1
push esi
push 0x4df0d8
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x403d18
push ebp
push esi
call fcn.00406dc9
mov eax, dword [0x472ddc]
push dword [eax + 0x124]
push esi
call fcn.00406966
push esi
call fcn.00405d9f
cmp eax, ebp
je 0x403d18
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebp
inc word [0x477008]
dec edi
jne 0x403cbb
push ebp
push ebx
call fcn.00406dc9
jmp 0x403c2c
cmp dword [0x472e94], ebp
je 0x403db1
push 3
call fcn.0040645d
push 4
mov ebx, eax
call fcn.0040645d
push 5
mov esi, eax
call fcn.0040645d
mov edi, eax
cmp ebx, ebp
je 0x403d9d
cmp esi, ebp
je 0x403d9d
cmp edi, ebp
je 0x403d9d
lea eax, [esp + 0x1c]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call ebx
test eax, eax
je 0x403d9d
lea eax, [esp + 0x24]
push eax
push str.SeShutdownPrivilege
push ebp
call esi
push ebp
push ebp
push ebp
lea eax, [esp + 0x2c]
push eax
push ebp
push dword [esp + 0x30]
mov dword [esp + 0x38], 1
mov dword [esp + 0x44], 2
call edi
push ebp
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403db1
push 9
call fcn.0040141d
mov eax, dword [0x472eac]
cmp eax, 0xffffffff
je 0x403dbf
mov dword [esp + 0x18], eax
push dword [esp + 0x18]
jmp 0x403c51