Function at 0x40344d
Capabilities:
Accept command line arguments
Check os version
Copy file
Delete file
Get common file path
Get file system object information
Set current directory
Set environment variable
Shutdown system
Terminate process

Disassembly:
sub esp, 0x2d4
push ebx
push esi
push edi
push 0x20
pop edi
xor ebx, ebx
push 0x8001
mov dword [esp + 0x14], ebx
mov dword [esp + 0x10], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x1c], ebx
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
call dword [sym.imp.KERNEL32.dll_GetVersion]
cmp ax, 6
je 0x403493
push ebx
call fcn.004065ef
cmp eax, ebx
je 0x403493
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.0040657f
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], 0
jne 0x403498
push ebp
push 9
call fcn.004065ef
push 7
call fcn.004065ef
mov dword [0x7a8a84], eax
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x7a8b38], eax
push ebx
lea eax, [esp + 0x34]
push 0x2b4
push eax
push ebx
push 0x79ff28
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x7a7a80
call fcn.00406215
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov ebp, 0x7b3000
push eax
push ebp
call fcn.00406215
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
cmp word [0x7b3000], 0x22
mov dword [0x7a8a80], eax
mov eax, ebp
jne 0x40352c
push 0x22
mov eax, 0x7b3002
pop edi
push edi
push eax
call fcn.00405bf6
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov ecx, eax
mov dword [esp + 0x18], ecx
mov ax, word [ecx]
cmp ax, bx
je 0x40365d
push 0x20
pop ebx
cmp ax, bx
jne 0x40355b
inc ecx
inc ecx
cmp word [ecx], bx
je 0x403554
cmp word [ecx], 0x22
jne 0x403566
inc ecx
push 0x22
inc ecx
pop ebx
cmp word [ecx], 0x2f
jne 0x403629
inc ecx
inc ecx
cmp word [ecx], 0x53
jne 0x403591
mov ax, word [ecx + 2]
cmp ax, 0x20
je 0x403587
test ax, ax
jne 0x403591
mov dword [0x7a8b20], 1
movzx eax, word [0x40a37e]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40a37c]
cdq
movzx edx, word [str.NCRC]
or edi, eax
movzx eax, word [0x40a37a]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx]
or edi, edx
cmp eax, esi
jne 0x4035e7
mov eax, dword [ecx + 4]
cmp eax, edi
jne 0x4035e7
mov ax, word [ecx + 8]
cmp ax, 0x20
je 0x4035e2
test ax, ax
jne 0x4035e7
or dword [esp + 0x1c], 4
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.__D]
or edi, eax
movzx eax, word [0x40a36e]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx - 4]
or edi, edx
cmp eax, esi
jne 0x403629
mov eax, dword [ecx]
cmp eax, edi
je 0x403648
push ebx
push ecx
call fcn.00405bf6
mov ecx, eax
cmp word [ecx], 0x22
jne 0x40363a
inc ecx
inc ecx
mov ax, word [ecx]
test ax, ax
jne 0x40354c
jmp 0x40365b
and word [ecx - 4], 0
add ecx, 4
push ecx
push 0x7b3800
call fcn.00406215
xor ebx, ebx
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
mov esi, 0x7b5800
push esi
push 0x400
call edi
call fcn.0040341c
test eax, eax
jne 0x4036cf
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatW
call fcn.0040341c
test eax, eax
jne 0x4036cf
push esi
push 0x3fc
call edi
push 0x40a358
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 0x40a344
call edi
call fcn.0040341c
test eax, eax
je 0x40379a
push 0x7b5000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push dword [esp + 0x1c]
call fcn.00402ed5
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x40379a
cmp dword [0x7a8a9c], ebx
je 0x40378a
push ebx
push ebp
call fcn.00405bf6
mov edi, eax
cmp edi, ebp
jb 0x403754
movzx eax, word [0x40a33e]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov ebx, eax
movzx eax, word [0x40a33c]
movzx ecx, word [0x40a338]
cdq
or ebx, eax
movzx eax, word [0x40a33a]
shl eax, 0x10
or eax, ecx
xor ecx, ecx
cdq
or ecx, eax
mov eax, ebx
or eax, edx
mov edx, dword [edi]
cmp edx, ecx
jne 0x40374c
mov edx, dword [edi + 4]
cmp edx, eax
je 0x403752
dec edi
dec edi
cmp edi, ebp
jae 0x40373f
xor ebx, ebx
cmp edi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x4037c6
mov word [edi], bx
add edi, 8
push edi
call fcn.00405cd1
test eax, eax
je 0x40379a
push edi
push 0x7b3800
call fcn.00406215
push edi
push 0x7b4000
call fcn.00406215
mov dword [esp + 0x10], ebx
or dword [0x7a8b2c], 0xffffffff
call fcn.00403a5e
mov dword [esp + 0x14], eax
call fcn.0040396c
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x4038d0
push 0x200010
push dword [esp + 0x10]
call fcn.0040595a
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.004058dd
push 0x40a32c
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatW
cmp edi, ebx
je 0x4037e7
push 0x40a328
push esi
call sub.KERNEL32.dll_lstrcatW
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatW
mov ebp, 0x7b4800
push ebp
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x40379a
cmp edi, ebx
push esi
je 0x40380f
call fcn.00405843
jmp 0x403814
call fcn.004058c0
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
cmp word [0x7b3800], bx
jne 0x40382f
push ebp
push 0x7b3800
call fcn.00406215
push dword [esp + 0x18]
push section..ndata
call fcn.00406215
movzx eax, word [0x40a316]
movzx ecx, word [0x40a314]
shl eax, 0x10
or eax, ecx
push 0x1a
mov dword [0x7a9800], eax
pop ebp
mov edi, 0x79f728
mov eax, dword [0x7a8a90]
push dword [eax + 0x120]
push edi
call fcn.00406237
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
cmp dword [esp + 0x10], ebx
je 0x4038ba
push 1
push edi
push 0x7b6800
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x4038ba
push ebx
push edi
call fcn.004060b6
mov eax, dword [0x7a8a90]
push dword [eax + 0x124]
push edi
call fcn.00406237
push edi
call fcn.004058f5
cmp eax, ebx
je 0x4038ba
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc word [0x7a9800]
dec ebp
jne 0x40385d
push ebx
push esi
call fcn.004060b6
jmp 0x40379a
cmp dword [0x7a8b14], ebx
je 0x403954
lea eax, [esp + 0x14]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
test eax, eax
je 0x403924
lea eax, [esp + 0x20]
push eax
push str.SeShutdownPrivilege
push ebx
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
push ebx
push ebx
lea eax, [esp + 0x24]
push ebx
push eax
push ebx
push dword [esp + 0x28]
mov dword [esp + 0x34], 1
mov dword [esp + 0x40], 2
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.004065ef
cmp eax, ebx
mov esi, 0x80040002
je 0x403940
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x40394d
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403954
push 9
call fcn.0040140b
mov eax, dword [0x7a8b2c]
cmp eax, 0xffffffff
je 0x403962
mov dword [esp + 0x10], eax
push dword [esp + 0x10]
call dword [sym.imp.KERNEL32.dll_ExitProcess]