Function at 0x401000
Capabilities:
Accept command line arguments
Check os version
Copy file
Delete file
Get common file path
Get file attributes
Get file system object information
Set current directory
Set environment variable
Shutdown system
Terminate process

Disassembly:
sub esp, 0x3ec
push ebx
push ebp
push esi
push edi
xor ebx, ebx
mov edi, str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
push 0x8001
mov dword [esp + 0x14], ebx
mov ebp, ebx
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
mov esi, dword [sym.imp.KERNEL32.dll_GetVersionExW]
lea eax, [esp + 0x2c]
xorps xmm0, xmm0
mov dword [esp + 0x40], ebx
push eax
movlpd qword [esp + 0x144], xmm0
mov dword [esp + 0x30], 0x11c
call esi
test eax, eax
jne 0x401082
lea eax, [esp + 0x2c]
mov dword [esp + 0x2c], 0x114
push eax
call esi
push 0x53
pop eax
mov dl, 4
mov byte [esp + 0x146], dl
cmp word [esp + 0x40], ax
jne 0x40107e
mov eax, dword [esp + 0x5a]
add eax, 0xffffffd0
mov word [esp + 0x140], ax
jmp 0x401089
xor eax, eax
jmp 0x401074
mov dl, byte [esp + 0x146]
cmp dword [esp + 0x30], 0xa
jae 0x40109b
movzx eax, word [esp + 0x38]
mov dword [esp + 0x38], eax
jmp 0x40109f
mov eax, dword [esp + 0x38]
mov dword [0x7c2278], eax
movzx eax, byte [esp + 0x30]
shl ax, 8
movzx ecx, ax
movzx eax, byte [esp + 0x34]
or ecx, eax
movzx eax, byte [esp + 0x140]
shl ax, 8
shl ecx, 0x10
movzx eax, ax
or ecx, eax
movzx eax, dl
or ecx, eax
mov eax, 0x600
mov dword [0x7c227c], ecx
sar ecx, 0x10
cmp cx, ax
je 0x4010f4
push ebx
call fcn.00406d93
test eax, eax
je 0x4010f4
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.0040664f
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
inc esi
add esi, eax
cmp byte [esi], bl
jne 0x4010f9
push 0xc
call fcn.00406d93
push 0xa
call fcn.00406d93
push 8
mov dword [0x7c1170], eax
call fcn.00406d93
test eax, eax
je 0x40113a
push 0x1e
call eax
test eax, eax
je 0x40113a
or byte [0x7c227c], 0x80
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
push ebx
push 0x2b4
mov dword [0x7c21e0], eax
lea eax, [esp + 0x150]
push eax
push ebx
push 0x41a6e8
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x7c1180
call fcn.00406fc7
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
push eax
mov esi, 0x7cd000
push esi
call fcn.00406fc7
movzx ecx, word [0x7cd000]
push 0x22
pop ebx
push 0x20
pop edx
cmp cx, bx
mov dword [0x7c1174], 0x400000
mov eax, ebx
mov dword [esp + 0x14], ebx
cmovne eax, edx
mov edx, 0x7cd002
movzx eax, ax
push eax
mov eax, esi
cmove eax, edx
push eax
call fcn.00406aa1
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov ecx, eax
mov ebx, ecx
mov dword [esp + 0x18], ebx
movzx eax, word [ecx]
test ax, ax
je 0x4012b5
mov esi, eax
push 0x20
pop edx
movzx eax, si
cmp si, dx
jne 0x4011f1
add ecx, 2
movzx eax, word [ecx]
cmp ax, dx
je 0x4011e6
mov ebx, edx
movzx esi, ax
movzx edx, ax
cmp ax, word [esp + 0x14]
jne 0x401209
movzx edx, word [ecx + 2]
push 0x22
pop eax
mov ebx, eax
cmp si, word [esp + 0x14]
lea eax, [ecx + 2]
cmovne eax, ecx
cmp dx, 0x2f
jne 0x401273
push 0x53
add eax, 2
pop ecx
push 0x20
pop edx
cmp word [eax], cx
jne 0x401240
movzx ecx, word [eax + 2]
cmp cx, dx
je 0x401236
test cx, cx
jne 0x401240
mov dword [0x7c2260], 1
cmp dword [eax], 0x43004e
jne 0x401262
cmp dword [eax + 4], 0x430052
jne 0x401262
movzx ecx, word [eax + 8]
cmp cx, dx
je 0x40125f
test cx, cx
jne 0x401262
or ebp, 4
cmp dword [eax - 4], 0x2f0020
jne 0x401273
cmp dword [eax], 0x3d0044
je 0x40129d
push ebx
push eax
call fcn.00406aa1
mov ecx, eax
push 0x22
pop ebx
movzx eax, word [ecx]
mov edx, eax
cmp ax, bx
jne 0x40128f
add ecx, 2
movzx edx, word [ecx]
movzx esi, dx
test dx, dx
jne 0x4011db
jmp 0x4012b1
xor ecx, ecx
mov word [eax - 4], cx
add eax, 4
push eax
push 0x7cd800
call fcn.00406fc7
mov ebx, dword [esp + 0x18]
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
push 0x7cf800
push 0x400
call esi
call fcn.00404171
test eax, eax
jne 0x40133b
push 0x3fb
push 0x7cf800
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push 0x7cf800
call sub.KERNEL32.dll_lstrcatW
call fcn.00404171
test eax, eax
jne 0x40133b
push 0x7cf800
push 0x3fc
call esi
push 0x41a710
mov esi, 0x7cf800
push esi
call sub.KERNEL32.dll_lstrcatW
push esi
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push str.TEMP
call esi
push 0x7cf800
push 0x41a724
call esi
call fcn.00404171
test eax, eax
je 0x40151c
push 0x7cf000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push ebp
call fcn.004039f7
mov edi, eax
test edi, edi
jne 0x40151c
cmp dword [0x7c2184], eax
je 0x4013c3
xor ebp, ebp
push ebp
push 0x7cd000
call fcn.00406aa1
mov esi, eax
mov eax, 0x7cd000
jmp 0x401388
cmp dword [esi], 0x5f0020
jne 0x401385
cmp dword [esi + 4], 0x3d003f
je 0x40138c
sub esi, 2
cmp esi, eax
jae 0x401374
mov edi, str.Error_launching_installer
cmp esi, eax
jb 0x4013d6
xor eax, eax
mov word [esi], ax
add esi, 8
push esi
call fcn.00406ae3
test eax, eax
je 0x401583
push esi
push 0x7cd800
call fcn.00406fc7
push esi
push 0x7ce000
call fcn.00406fc7
mov edi, ebp
or dword [0x7c226c], 0xffffffff
call fcn.00405efe
mov ebx, eax
jmp 0x401520
call fcn.004069a7
push 0x7cf800
mov dword [esp + 0x1c], eax
call sub.KERNEL32.dll_lstrlenW
push ebx
push section..ndata
mov esi, eax
call fcn.00406fc7
cmp word [0x7cd800], bp
jne 0x40140e
push 0x7ce800
push 0x7cd800
call fcn.00406fc7
xor ebx, ebx
lea eax, [esi*2 + 0x7cf800]
inc ebx
mov dword [esp + 0x14], eax
mov esi, ebp
movzx ebp, bx
push ebp
push str.nsu_X.tmp
push eax
call dword [sym.imp.USER32.dll_wsprintfW]
mov eax, dword [0x7c2190]
add esp, 0xc
push dword [eax + 0x120]
push 0x7c5800
call fcn.00406359
cmp dword [esp + 0x18], 0
push 0x7cf800
je 0x401459
call fcn.004062fe
jmp 0x40145e
call fcn.004062de
test eax, eax
je 0x4014ab
push 0x7c5800
call dword [sym.imp.KERNEL32.dll_GetFileAttributesW]
test eax, 0x400
jne 0x401561
push 0x7c5800
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
test eax, eax
je 0x401561
push 1
push 0x7cf800
call fcn.00406bc6
mov eax, esi
inc esi
test eax, eax
jne 0x401561
mov eax, dword [esp + 0x14]
jmp 0x401421
push 0x7cf800
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
push 0
push 0x7cf800
call fcn.004066e8
push 1
push 0x7c5800
push 0x7d0800
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x40151c
push 0
push 0x7c5800
call fcn.004066e8
mov eax, dword [0x7c2190]
push dword [eax + 0x124]
push 0x7c6000
call fcn.00406359
push 0x7c6000
call fcn.00406b83
test eax, eax
jne 0x401574
mov eax, esi
inc esi
test eax, eax
jne 0x40151c
push 0x7c5800
call fcn.00406a7a
test eax, eax
je 0x4014a2
mov ebx, dword [esp + 0x10]
xor ebp, ebp
call fcn.00404147
call dword [sym.imp.ole32.dll_OleUninitialize]
test edi, edi
je 0x401596
movzx eax, word [0x41a5f2]
cdq
mov ecx, eax
movzx eax, word [0x41a5f0]
shld edx, ecx, 0x10
cdq
shl ecx, 0x10
or ecx, eax
xor eax, eax
or eax, 0x45
cmp dword [edi], eax
jne 0x401587
cmp dword [edi + 4], ecx
jne 0x401587
push ebp
call dword [sym.imp.KERNEL32.dll_ExitProcess]
mov eax, dword [esp + 0x14]
inc ebx
push 0
pop ebp
test bx, bx
jne 0x40141c
jmp 0x40151c
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
xor ebp, ebp
mov edi, ebp
mov ebx, edi
jmp 0x401522
mov ebx, ebp
jmp 0x401520
push 0x200010
push edi
call fcn.00406f55
push 2
jmp 0x40155b
cmp dword [0x7c2254], 0
je 0x40161b
lea eax, [esp + 0x18]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
test eax, eax
je 0x4015eb
lea eax, [esp + 0x20]
push eax
push str.SeShutdownPrivilege
push ebp
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
push ebp
push ebp
push ebp
lea eax, [esp + 0x28]
mov dword [esp + 0x28], 1
push eax
push ebp
push dword [esp + 0x2c]
mov dword [esp + 0x40], 2
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.00406d93
mov esi, 0x80040002
test eax, eax
je 0x401607
push esi
push 0x25
push ebp
push ebp
push ebp
call eax
test eax, eax
je 0x401614
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x40161b
push 9
call fcn.00401b6b
cmp dword [0x7c226c], 0xffffffff
cmovne ebx, dword [0x7c226c]
push ebx
jmp 0x40155b