Function at 0x40364b
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, 0x3f8
push ebp
push esi
push edi
push 0x20
pop edi
xor ebp, ebp
push 0x8001
mov dword [esp + 0x20], ebp
mov dword [esp + 0x18], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x14], ebp
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
mov esi, dword [sym.imp.KERNEL32.dll_GetVersionExW]
lea eax, [esp + 0x34]
push eax
mov dword [esp + 0x4c], ebp
mov dword [esp + 0x14c], ebp
mov dword [esp + 0x150], ebp
mov dword [esp + 0x38], 0x11c
call esi
test eax, eax
jne 0x4036d7
lea eax, [esp + 0x34]
mov dword [esp + 0x34], 0x114
push eax
call esi
mov ax, word [esp + 0x48]
mov ecx, dword [esp + 0x62]
sub ax, 0x53
add ecx, 0xffffffd0
neg ax
sbb eax, eax
mov byte [esp + 0x14e], 4
not eax
and eax, ecx
mov word [esp + 0x148], ax
cmp dword [esp + 0x38], 0xa
jae 0x4036e4
and word [esp + 0x42], 0
mov eax, dword [esp + 0x40]
movzx ecx, byte [esp + 0x3c]
mov dword [0x7a8358], eax
xor eax, eax
mov ah, byte [esp + 0x38]
movzx eax, ax
or eax, ecx
xor ecx, ecx
mov ch, byte [esp + 0x148]
movzx ecx, cx
shl eax, 0x10
or eax, ecx
movzx ecx, byte [esp + 0x14e]
or eax, ecx
mov dword [0x7a835c], eax
cmp word [0x7a835e], 0x600
je 0x403739
push ebp
call fcn.00406a7c
cmp eax, ebp
je 0x403739
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00406a0c
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], 0
jne 0x40373e
push 0xc
call fcn.00406a7c
push 0xa
call fcn.00406a7c
push 8
mov dword [0x7a82a4], eax
call fcn.00406a7c
cmp eax, ebp
je 0x403781
push 0x1e
call eax
test eax, eax
je 0x403781
or byte [0x7a835c], 0x80
push ebx
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebp
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x7a8360], eax
push ebp
lea eax, [esp + 0x158]
push 0x2b4
push eax
push ebp
push 0x79f748
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x7a72a0
call fcn.00406688
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov ebx, 0x7b3000
push eax
push ebx
call fcn.00406688
push 0x22
mov dword [0x7a82a0], 0x400000
pop esi
mov eax, ebx
cmp word [0x7b3000], si
jne 0x4037ee
mov edi, esi
mov eax, 0x7b3002
push edi
push eax
call fcn.00405f84
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov ecx, eax
mov dword [esp + 0x1c], ecx
jmp 0x4038fd
push 0x20
pop edx
cmp ax, dx
jne 0x403816
inc ecx
inc ecx
cmp word [ecx], dx
je 0x40380f
cmp word [ecx], si
mov dword [esp + 0x10], edx
jne 0x403825
inc ecx
mov dword [esp + 0x10], esi
inc ecx
cmp word [ecx], 0x2f
jne 0x4038ea
inc ecx
inc ecx
cmp word [ecx], 0x53
jne 0x40384f
mov ax, word [ecx + 2]
cmp ax, dx
je 0x403845
cmp ax, bp
jne 0x40384f
mov dword [0x7a8340], 1
movzx eax, word [0x40a372]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40a370]
cdq
movzx edx, word [str.NCRC]
or edi, eax
movzx eax, word [0x40a36e]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx]
or edi, edx
cmp eax, esi
jne 0x4038a5
mov eax, dword [ecx + 4]
cmp eax, edi
jne 0x4038a5
mov ax, word [ecx + 8]
cmp ax, 0x20
je 0x4038a0
cmp ax, bp
jne 0x4038a5
or dword [esp + 0x14], 4
movzx eax, word [0x40a366]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40a364]
cdq
movzx edx, word [str.__D]
or edi, eax
movzx eax, word [0x40a362]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx - 4]
or edi, edx
cmp eax, esi
jne 0x4038e7
mov eax, dword [ecx]
cmp eax, edi
je 0x40390b
push 0x22
pop esi
push dword [esp + 0x10]
push ecx
call fcn.00405f84
mov ecx, eax
cmp word [ecx], si
jne 0x4038fd
inc ecx
inc ecx
mov ax, word [ecx]
cmp ax, bp
jne 0x403807
jmp 0x40391d
mov word [ecx - 4], bp
add ecx, 4
push ecx
push 0x7b3800
call fcn.00406688
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
mov esi, 0x7b5800
push esi
push 0x400
call edi
call fcn.0040361a
test eax, eax
jne 0x40398f
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatW
call fcn.0040361a
test eax, eax
jne 0x40398f
push esi
push 0x3fc
call edi
push 0x40a34c
push esi
call sub.KERNEL32.dll_lstrcatW
mov edi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push esi
push str.TEMP
call edi
push esi
push 0x40a338
call edi
call fcn.0040361a
test eax, eax
je 0x403b96
push 0x7b5000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push dword [esp + 0x14]
call fcn.004030d5
cmp eax, ebp
mov dword [esp + 0x18], eax
jne 0x403b96
cmp dword [0x7a82bc], ebp
je 0x403a4e
push ebp
push ebx
call fcn.00405f84
mov edi, eax
cmp edi, ebx
jb 0x403a14
movzx eax, word [0x40a332]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov ebp, eax
movzx eax, word [0x40a330]
movzx ecx, word [0x40a32c]
cdq
or ebp, eax
movzx eax, word [0x40a32e]
shl eax, 0x10
or eax, ecx
xor ecx, ecx
cdq
or ecx, eax
mov eax, ebp
or eax, edx
mov edx, dword [edi]
cmp edx, ecx
jne 0x403a0c
mov edx, dword [edi + 4]
cmp edx, eax
je 0x403a12
dec edi
dec edi
cmp edi, ebx
jae 0x4039ff
xor ebp, ebp
cmp edi, ebx
mov dword [esp + 0x18], str.Error_launching_installer
jb 0x403a63
mov word [edi], bp
add edi, 8
push edi
call fcn.0040605f
test eax, eax
je 0x403b96
push edi
push 0x7b3800
call fcn.00406688
push edi
push 0x7b4000
call fcn.00406688
mov dword [esp + 0x18], ebp
or dword [0x7a834c], 0xffffffff
call fcn.00403d5a
mov dword [esp + 0x20], eax
jmp 0x403b96
call fcn.00405c53
push esi
mov dword [esp + 0x28], eax
call sub.KERNEL32.dll_lstrlenW
push dword [esp + 0x1c]
mov edi, eax
push section..ndata
call fcn.00406688
cmp word [0x7b3800], bp
jne 0x403a9a
push 0x7b4800
push 0x7b3800
call fcn.00406688
lea eax, [edi*2 + 0x7b5800]
mov dword [esp + 0x14], 1
mov dword [esp + 0x1c], eax
mov edi, 0x7ab800
mov ebx, 0x7ac000
mov dword [esp + 0x10], ebp
movzx ebp, word [esp + 0x14]
push ebp
push str.nsu_X.tmp
push dword [esp + 0x24]
call dword [sym.imp.USER32.dll_wsprintfW]
mov eax, dword [0x7a82b0]
add esp, 0xc
push dword [eax + 0x120]
push edi
call fcn.004066c5
cmp dword [esp + 0x24], 0
push esi
je 0x403af3
call fcn.00405bdc
jmp 0x403af8
call fcn.00405c36
test eax, eax
je 0x403b36
push edi
call dword [sym.imp.KERNEL32.dll_GetFileAttributesW]
test ah, 4
jne 0x403b27
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
test eax, eax
je 0x403b27
push 1
push esi
call fcn.00405d94
mov eax, dword [esp + 0x10]
inc dword [esp + 0x10]
test eax, eax
je 0x403ac0
inc dword [esp + 0x14]
xor ebp, ebp
cmp word [esp + 0x14], bp
jne 0x403ab7
jmp 0x403b96
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
push 0
push esi
call fcn.00406448
push 1
push edi
push 0x7b6800
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x403b94
push 0
push edi
call fcn.00406448
mov eax, dword [0x7a82b0]
push dword [eax + 0x124]
push ebx
call fcn.004066c5
push ebx
call fcn.00405c6b
test eax, eax
jne 0x403bbe
mov eax, dword [esp + 0x10]
inc dword [esp + 0x10]
test eax, eax
jne 0x403b94
push edi
call fcn.004069e5
test eax, eax
je 0x403ac0
xor ebp, ebp
call fcn.00403c68
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x18], ebp
pop ebx
je 0x403bcc
push 0x200010
push dword [esp + 0x18]
call fcn.00405ce8
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
and dword [esp + 0x18], 0
jmp 0x403b94
cmp dword [0x7a8334], ebp
je 0x403c50
lea eax, [esp + 0x20]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
test eax, eax
je 0x403c20
lea eax, [esp + 0x28]
push eax
push str.SeShutdownPrivilege
push ebp
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
push ebp
push ebp
lea eax, [esp + 0x2c]
push ebp
push eax
push ebp
push dword [esp + 0x34]
mov dword [esp + 0x3c], 1
mov dword [esp + 0x48], 2
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.00406a7c
cmp eax, ebp
mov esi, 0x80040002
je 0x403c3c
push esi
push 0x25
push ebp
push ebp
push ebp
call eax
test eax, eax
je 0x403c49
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403c50
push 9
call fcn.0040140b
mov eax, dword [0x7a834c]
cmp eax, 0xffffffff
je 0x403c5e
mov dword [esp + 0x1c], eax
push dword [esp + 0x1c]
call dword [sym.imp.KERNEL32.dll_ExitProcess]