Function at 0x4037bf
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 [0x4488f8], eax
call fcn.00405fc0
push ebx
push 0x160
mov dword [0x4487e0], eax
lea eax, [esp + 0x38]
push eax
push ebx
push 0x408a9b
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x4447e0
call fcn.00405d2b
call dword [sym.imp.KERNEL32.DLL_GetCommandLineA]
push eax
mov edi, 0x471000
push edi
call fcn.00405d2b
push ebx
call dword [sym.imp.KERNEL32.DLL_GetModuleHandleA]
cmp byte [0x471000], 0x22
mov dword [0x4487e8], eax
mov eax, edi
jne 0x403860
mov byte [esp + 0x14], 0x22
mov eax, 0x471001
push dword [esp + 0x14]
push eax
call fcn.00405ac0
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x4038da
cmp cl, 0x20
jne 0x403882
inc eax
cmp byte [eax], 0x20
je 0x40387c
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x403892
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x4038ca
inc eax
cmp byte [eax], 0x53
jne 0x4038ab
mov cl, byte [eax + 1]
or cl, 0x20
cmp cl, 0x20
jne 0x4038ab
or esi, 2
cmp dword [eax], 0x4352434e
jne 0x4038c1
mov cl, byte [eax + 4]
or cl, 0x20
cmp cl, 0x20
jne 0x4038c1
or esi, 4
cmp dword [eax - 2], 0x3d442f20
je 0x4038e2
push dword [esp + 0x14]
push eax
call fcn.00405ac0
cmp byte [eax], 0x22
jne 0x4038da
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x403877
jmp 0x4038f3
mov dword [eax - 2], ebx
add eax, 2
push eax
push 0x473000
call fcn.00405d2b
mov ebp, 0x47b000
push ebp
push 0x2000
call dword [sym.imp.KERNEL32.DLL_GetTempPathA]
call fcn.00403749
test eax, eax
jne 0x403931
push 0x1ffb
push ebp
call dword [sym.imp.KERNEL32.DLL_GetWindowsDirectoryA]
push str.Temp
push ebp
call sub.KERNEL32.DLL_lstrcatA
call fcn.00403749
test eax, eax
je 0x4039b6
push 0x479000
call dword [sym.imp.KERNEL32.DLL_DeleteFileA]
push esi
call fcn.004034ad
mov dword [esp + 0x10], eax
cmp eax, ebx
jne 0x4039b6
cmp dword [0x448864], ebx
je 0x40399f
push ebx
push edi
call fcn.00405ac0
mov esi, eax
jmp 0x403966
cmp dword [esi], 0x3d3f5f20
je 0x40396a
dec esi
cmp esi, edi
jae 0x40395d
mov dword [esp + 0x10], str.Error_launching_installer
cmp esi, edi
jb 0x4039e1
mov byte [esi], bl
add esi, 4
push esi
call fcn.0040607e
test eax, eax
je 0x4039b6
push esi
push 0x473000
call fcn.00405d2b
push esi
push 0x475000
call fcn.00405d2b
mov dword [esp + 0x10], ebx
or dword [0x4488ec], 0xffffffff
call fcn.00405710
push 1
mov dword [esp + 0x1c], eax
call fcn.00405de7
call fcn.0040377d
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
je 0x403ab0
push 0x200010
push dword [esp + 0x14]
call fcn.00405a5a
push 2
call dword [sym.imp.KERNEL32.DLL_ExitProcess]
push str.nsu.tmp
push ebp
call sub.KERNEL32.DLL_lstrcatA
mov esi, 0x477000
push esi
push ebp
call dword [sym.imp.KERNEL32.DLL_lstrcmpiA]
test eax, eax
je 0x4039b6
push ebx
push ebp
call dword [sym.imp.KERNEL32.DLL_CreateDirectoryA]
push ebp
call dword [sym.imp.KERNEL32.DLL_SetCurrentDirectoryA]
cmp byte [0x473000], bl
jne 0x403a1f
push esi
push 0x473000
call fcn.00405d2b
push dword [esp + 0x1c]
push section..ndata
call fcn.00405d2b
push 0x41
pop eax
push 0x1a
mov word [0x44b000], ax
pop edi
mov esi, 0x4289b0
mov eax, dword [0x4487ec]
push dword [eax + 0x148]
push esi
call fcn.00406156
push esi
call dword [sym.imp.KERNEL32.DLL_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x403a9b
push 1
push esi
push 0x47f000
call dword [sym.imp.KERNEL32.DLL_CopyFileA]
test eax, eax
je 0x403a9b
push ebx
push esi
call fcn.004063b0
mov eax, dword [0x4487ec]
push dword [eax + 0x14c]
push esi
call fcn.00406156
push esi
call fcn.004059f9
cmp eax, ebx
je 0x403a9b
push eax
call dword [sym.imp.KERNEL32.DLL_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x44b000]
dec edi
jne 0x403a3e
push ebx
push ebp
call fcn.004063b0
jmp 0x4039b6
cmp dword [0x4488d4], ebx
je 0x403b33
push 3
call fcn.00405fc0
push 4
mov ebp, eax
call fcn.00405fc0
push 5
mov esi, eax
call fcn.00405fc0
mov edi, eax
cmp ebp, ebx
je 0x403b1f
cmp esi, ebx
je 0x403b1f
cmp edi, ebx
je 0x403b1f
lea eax, [esp + 0x1c]
push eax
push 0x28
call dword [sym.imp.KERNEL32.DLL_GetCurrentProcess]
push eax
call ebp
test eax, eax
je 0x403b1f
lea eax, [esp + 0x24]
push eax
push str.SeShutdownPrivilege
push ebx
call esi
push ebx
push ebx
push ebx
lea eax, [esp + 0x2c]
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 0x403b33
push 9
call fcn.00401398
mov eax, dword [0x4488ec]
cmp eax, 0xffffffff
je 0x403b41
mov dword [esp + 0x18], eax
push dword [esp + 0x18]
jmp 0x4039db