Function at 0x403a0a
Capabilities:
Accept command line arguments
Check for time delay via gettickcount
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, 0x2d8
push ebx
push ebp
push esi
push edi
push 0x20
xor ebx, ebx
pop esi
mov dword [esp + 0x18], ebx
mov dword [esp + 0x10], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x14], ebx
call dword [sym.imp.KERNEL32.dll_GetTickCount]
mov dword [esp + 0x1c], eax
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 [0x473eb8], eax
call fcn.00406482
push ebx
push 0x2b4
mov dword [0x473dd0], eax
lea eax, [esp + 0x3c]
push eax
push ebx
push 0x40a384
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x46bdc0
call fcn.0040618f
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
push eax
mov edi, 0x4c40a0
push edi
call fcn.0040618f
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
cmp word [0x4c40a0], 0x22
mov dword [0x473dd8], eax
mov eax, edi
jne 0x403ab4
push 0x22
pop esi
mov eax, 0x4c40a2
push esi
push eax
call fcn.00405e8e
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov esi, eax
mov dword [esp + 0x20], esi
jmp 0x403b59
push 0x20
pop ebp
cmp ax, bp
jne 0x403adc
inc esi
inc esi
cmp word [esi], bp
je 0x403ad5
cmp word [esi], 0x22
jne 0x403ae7
inc esi
push 0x22
inc esi
pop ebp
cmp word [esi], 0x2f
jne 0x403b48
inc esi
inc esi
cmp word [esi], 0x53
jne 0x403b09
movzx eax, word [esi + 2]
cmp ax, 0x20
je 0x403b04
cmp ax, bx
jne 0x403b09
or dword [esp + 0x14], 2
push 4
push str.NCRC
push esi
call fcn.00403971
add esp, 0xc
test eax, eax
jne 0x403b31
movzx eax, word [esi + 8]
cmp ax, 0x20
je 0x403b2c
cmp ax, bx
jne 0x403b31
or dword [esp + 0x14], 4
push 4
lea eax, [esi - 4]
push str.__D
push eax
call fcn.00403971
add esp, 0xc
test eax, eax
je 0x403b67
push ebp
push esi
call fcn.00405e8e
mov esi, eax
cmp word [esi], 0x22
jne 0x403b59
inc esi
inc esi
movzx eax, word [esi]
cmp ax, bx
jne 0x403acd
jmp 0x403b84
push 8
lea eax, [esi - 4]
push ebx
push eax
call fcn.0040888c
add esp, 0xc
add esi, 4
push esi
push 0x4c80a8
call fcn.0040618f
mov ebp, 0x4d80c8
push ebp
push 0x2004
call dword [sym.imp.KERNEL32.dll_GetTempPathW]
call fcn.0040393d
test eax, eax
jne 0x403bc2
push 0x1fff
push ebp
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push ebp
call sub.KERNEL32.dll_lstrcatW
call fcn.0040393d
test eax, eax
je 0x403c76
push 0x4d40c0
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push dword [esp + 0x14]
call fcn.004036a2
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403c76
cmp dword [0x473e24], ebx
je 0x403c49
push ebx
push edi
call fcn.00405e8e
mov esi, eax
jmp 0x403c0b
push 4
push str.___
push esi
call fcn.00403971
add esp, 0xc
test eax, eax
je 0x403c0f
dec esi
dec esi
cmp esi, edi
jae 0x403bf5
cmp esi, edi
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x403ca1
mov word [esi], bx
add esi, 8
push esi
call fcn.004068fa
test eax, eax
je 0x403c76
push esi
push 0x4c80a8
call fcn.0040618f
push esi
push 0x4cc0b0
call fcn.0040618f
mov dword [esp + 0x10], ebx
or dword [0x473eac], 0xffffffff
call fcn.00405ab9
mov dword [esp + 0x18], eax
call dword [sym.imp.KERNEL32.dll_GetTickCount]
sub eax, dword [esp + 0x1c]
push eax
push dword [esp + 0x1c]
call fcn.00407b71
pop ecx
pop ecx
push 1
call fcn.0040626d
call fcn.004039c8
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
je 0x403d78
push 0x200010
push dword [esp + 0x14]
call fcn.00405e2a
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
push 0x40a328
push ebp
call sub.KERNEL32.dll_lstrcatW
mov esi, 0x4d00b8
push esi
push ebp
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x403c76
push ebx
push ebp
call dword [sym.imp.KERNEL32.dll_CreateDirectoryW]
push ebp
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
cmp word [0x4c80a8], bx
jne 0x403ce0
push esi
push 0x4c80a8
call fcn.0040618f
push dword [esp + 0x20]
push section..ndata
call fcn.0040618f
push 0x40a324
push 0x478008
call fcn.0040618f
push 0x1a
pop edi
mov esi, 0x4341f8
mov eax, dword [0x473ddc]
push dword [eax + 0x134]
push esi
call fcn.00406982
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
cmp dword [esp + 0x10], ebx
je 0x403d62
push 1
push esi
push 0x4e00d8
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x403d62
push ebx
push esi
call fcn.00406dde
mov eax, dword [0x473ddc]
push dword [eax + 0x138]
push esi
call fcn.00406982
push esi
call fcn.00405dc9
cmp eax, ebx
je 0x403d62
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc word [0x478008]
dec edi
jne 0x403d05
push ebx
push ebp
call fcn.00406dde
jmp 0x403c76
cmp dword [0x473e94], ebx
je 0x403dfb
push 3
call fcn.00406482
push 4
mov ebp, eax
call fcn.00406482
push 5
mov esi, eax
call fcn.00406482
cmp ebp, ebx
mov edi, eax
je 0x403de7
cmp esi, ebx
je 0x403de7
cmp edi, ebx
je 0x403de7
lea eax, [esp + 0x1c]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call ebp
test eax, eax
je 0x403de7
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 + 0x30]
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 0x403dfb
push 9
call fcn.00401414
mov eax, dword [0x473eac]
cmp eax, 0xffffffff
je 0x403e09
mov dword [esp + 0x18], eax
push dword [esp + 0x18]
jmp 0x403c9b