Function at 0x403350
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]
and eax, 0xbfffffff
cmp ax, 6
mov dword [0x7a8a2c], eax
je 0x4033a0
push ebx
call fcn.00406639
cmp eax, ebx
je 0x4033a0
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.004065c9
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], 0
jne 0x4033a5
push 0xa
call fcn.00406639
push 8
call fcn.00406639
push 6
mov dword [0x7a8a24], eax
call fcn.00406639
cmp eax, ebx
je 0x4033e8
push 0x1e
call eax
test eax, eax
je 0x4033e8
or byte [0x7a8a2f], 0x40
push ebp
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x7a8af8], eax
push ebx
lea eax, [esp + 0x34]
push 0x2b4
push eax
push ebx
push 0x79fee0
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x7a7a20
call fcn.0040625f
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov ebp, 0x7b3000
push eax
push ebp
call fcn.0040625f
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
cmp word [0x7b3000], 0x22
mov dword [0x7a8a20], eax
mov eax, ebp
jne 0x403453
push 0x22
mov eax, 0x7b3002
pop edi
push edi
push eax
call fcn.00405b5d
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 0x403584
push 0x20
pop ebx
cmp ax, bx
jne 0x403482
inc ecx
inc ecx
cmp word [ecx], bx
je 0x40347b
cmp word [ecx], 0x22
jne 0x40348d
inc ecx
push 0x22
inc ecx
pop ebx
cmp word [ecx], 0x2f
jne 0x403550
inc ecx
inc ecx
cmp word [ecx], 0x53
jne 0x4034b8
mov ax, word [ecx + 2]
cmp ax, 0x20
je 0x4034ae
test ax, ax
jne 0x4034b8
mov dword [0x7a8ae0], 1
movzx eax, word [0x40a2c2]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40a2c0]
cdq
movzx edx, word [str.NCRC]
or edi, eax
movzx eax, word [0x40a2be]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx]
or edi, edx
cmp eax, esi
jne 0x40350e
mov eax, dword [ecx + 4]
cmp eax, edi
jne 0x40350e
mov ax, word [ecx + 8]
cmp ax, 0x20
je 0x403509
test ax, ax
jne 0x40350e
or dword [esp + 0x1c], 4
movzx eax, word [0x40a2b6]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40a2b4]
cdq
movzx edx, word [str.__D]
or edi, eax
movzx eax, word [0x40a2b2]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx - 4]
or edi, edx
cmp eax, esi
jne 0x403550
mov eax, dword [ecx]
cmp eax, edi
je 0x40356f
push ebx
push ecx
call fcn.00405b5d
mov ecx, eax
cmp word [ecx], 0x22
jne 0x403561
inc ecx
inc ecx
mov ax, word [ecx]
test ax, ax
jne 0x403473
jmp 0x403582
and word [ecx - 4], 0
add ecx, 4
push ecx
push 0x7b3800
call fcn.0040625f
xor ebx, ebx
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
mov edi, 0x7b5800
push edi
push 0x400
call esi
call fcn.0040331f
test eax, eax
jne 0x4035f6
push 0x3fb
push edi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push edi
call sub.KERNEL32.dll_lstrcatW
call fcn.0040331f
test eax, eax
jne 0x4035f6
push edi
push 0x3fc
call esi
push 0x40a29c
push edi
call sub.KERNEL32.dll_lstrcatW
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push edi
push str.TEMP
call esi
push edi
push 0x40a288
call esi
call fcn.0040331f
test eax, eax
je 0x4036c1
push 0x7b5000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push dword [esp + 0x1c]
call fcn.00402ec1
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x4036c1
cmp dword [0x7a8a40], ebx
je 0x4036b1
push ebx
push ebp
call fcn.00405b5d
mov esi, eax
cmp esi, ebp
jb 0x40367b
movzx eax, word [0x40a282]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov ebx, eax
movzx eax, word [0x40a280]
movzx ecx, word [str.___]
cdq
or ebx, eax
movzx eax, word [0x40a27e]
shl eax, 0x10
or eax, ecx
xor ecx, ecx
cdq
or ecx, eax
mov eax, ebx
or eax, edx
mov edx, dword [esi]
cmp edx, ecx
jne 0x403673
mov edx, dword [esi + 4]
cmp edx, eax
je 0x403679
dec esi
dec esi
cmp esi, ebp
jae 0x403666
xor ebx, ebx
cmp esi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x4036ed
mov word [esi], bx
add esi, 8
push esi
call fcn.00405c38
test eax, eax
je 0x4036c1
push esi
push 0x7b3800
call fcn.0040625f
push esi
push 0x7b4000
call fcn.0040625f
mov dword [esp + 0x10], ebx
or dword [0x7a8aec], 0xffffffff
call fcn.0040396d
mov dword [esp + 0x14], eax
call fcn.00403893
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x4037f7
push 0x200010
push dword [esp + 0x10]
call fcn.004058c1
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.0040582c
push 0x40a270
push edi
mov esi, eax
call sub.KERNEL32.dll_lstrcatW
cmp esi, ebx
je 0x40370e
push 0x40a26c
push edi
call sub.KERNEL32.dll_lstrcatW
push str..tmp
push edi
call sub.KERNEL32.dll_lstrcatW
mov ebp, 0x7b4800
push ebp
push edi
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x4036c1
cmp esi, ebx
push edi
je 0x403736
call fcn.00405792
jmp 0x40373b
call fcn.0040580f
push edi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
cmp word [0x7b3800], bx
jne 0x403756
push ebp
push 0x7b3800
call fcn.0040625f
push dword [esp + 0x18]
push section..ndata
call fcn.0040625f
movzx eax, word [0x40a25a]
movzx ecx, word [0x40a258]
shl eax, 0x10
or eax, ecx
push 0x1a
mov dword [0x7a9800], eax
pop ebp
mov esi, 0x79f6e0
mov eax, dword [0x7a8a34]
push dword [eax + 0x120]
push esi
call fcn.00406281
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
cmp dword [esp + 0x10], ebx
je 0x4037e1
push 1
push esi
push 0x7b6800
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x4037e1
push ebx
push esi
call fcn.00406025
mov eax, dword [0x7a8a34]
push dword [eax + 0x124]
push esi
call fcn.00406281
push esi
call fcn.00405844
cmp eax, ebx
je 0x4037e1
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc word [0x7a9800]
dec ebp
jne 0x403784
push ebx
push edi
call fcn.00406025
jmp 0x4036c1
cmp dword [0x7a8ad4], ebx
je 0x40387b
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 0x40384b
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.00406639
cmp eax, ebx
mov esi, 0x80040002
je 0x403867
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x403874
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x40387b
push 9
call fcn.0040140b
mov eax, dword [0x7a8aec]
cmp eax, 0xffffffff
je 0x403889
mov dword [esp + 0x10], eax
push dword [esp + 0x10]
call dword [sym.imp.KERNEL32.dll_ExitProcess]