Function at 0x403252
Capabilities:
Accept command line arguments
Check os version
Copy file
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
push edi
xor ebx, ebx
push 0x8001
mov dword [esp + 0x1c], ebx
mov dword [esp + 0x14], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
xor esi, esi
mov byte [esp + 0x18], 0x20
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
call dword [sym.imp.KERNEL32.dll_GetVersion]
cmp ax, 6
je 0x403299
push ebx
call fcn.0040608a
cmp eax, ebx
je 0x403299
push 0xc00
call eax
push str.UXTHEME
call fcn.00406020
push str.USERENV
call fcn.00406020
push str.SETUPAPI
call fcn.00406020
push 0xd
call fcn.0040608a
push 0xb
call fcn.0040608a
mov dword [0x7a27c4], eax
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x7a2878], eax
push ebx
lea eax, [esp + 0x34]
push 0x160
push eax
push ebx
push 0x79dd78
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x7a1fc0
call fcn.00405cfe
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebp, 0x7a8000
push eax
push ebp
call fcn.00405cfe
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x7a8000], 0x22
mov dword [0x7a27c0], eax
mov eax, ebp
jne 0x403335
mov byte [esp + 0x14], 0x22
mov eax, 0x7a8001
push dword [esp + 0x14]
push eax
call fcn.0040581c
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x4033af
cmp cl, 0x20
jne 0x403357
inc eax
cmp byte [eax], 0x20
je 0x403351
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x403367
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x40339f
inc eax
cmp byte [eax], 0x53
jne 0x403380
mov cl, byte [eax + 1]
or cl, 0x20
cmp cl, 0x20
jne 0x403380
or esi, 2
cmp dword [eax], 0x4352434e
jne 0x403396
mov cl, byte [eax + 4]
or cl, 0x20
cmp cl, 0x20
jne 0x403396
or esi, 4
cmp dword [eax - 2], 0x3d442f20
je 0x4033b7
push dword [esp + 0x14]
push eax
call fcn.0040581c
cmp byte [eax], 0x22
jne 0x4033af
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x40334c
jmp 0x4033c8
mov dword [eax - 2], ebx
add eax, 2
push eax
push 0x7a8400
call fcn.00405cfe
mov edi, 0x7a9400
push edi
push 0x400
call dword [sym.imp.KERNEL32.dll_GetTempPathA]
call fcn.00403221
test eax, eax
jne 0x403402
push 0x3fb
push edi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push edi
call sub.KERNEL32.dll_lstrcatA
call fcn.00403221
test eax, eax
je 0x403480
push 0x7a9000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push esi
call fcn.00402c88
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403480
cmp dword [0x7a27dc], ebx
je 0x403470
push ebx
push ebp
call fcn.0040581c
mov esi, eax
jmp 0x403437
cmp dword [esi], 0x3d3f5f20
je 0x40343b
dec esi
cmp esi, ebp
jae 0x40342e
cmp esi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x4034ab
mov byte [esi], bl
add esi, 4
push esi
call fcn.004058d2
test eax, eax
je 0x403480
push esi
push 0x7a8400
call fcn.00405cfe
push esi
push 0x7a8800
call fcn.00405cfe
mov dword [esp + 0x10], ebx
or dword [0x7a286c], 0xffffffff
call fcn.00403751
mov dword [esp + 0x18], eax
call fcn.0040365f
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
je 0x4035a4
push 0x200010
push dword [esp + 0x14]
call fcn.004055bf
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.00405546
push str.nsu
push edi
mov esi, eax
call sub.KERNEL32.dll_lstrcatA
cmp esi, ebx
je 0x4034cc
push 0x4091ac
push edi
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push edi
call sub.KERNEL32.dll_lstrcatA
mov ebp, 0x7a8c00
push ebp
push edi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x403480
cmp esi, ebx
push edi
je 0x4034f4
call fcn.004054ac
jmp 0x4034f9
call fcn.00405529
push edi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x7a8400], bl
jne 0x403513
push ebp
push 0x7a8400
call fcn.00405cfe
push dword [esp + 0x1c]
push section..ndata
call fcn.00405cfe
push 0x1a
mov word [0x7a3400], 0x41
pop ebp
mov esi, 0x79d978
mov eax, dword [0x7a27d0]
push dword [eax + 0x120]
push esi
call fcn.00405d20
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x40358f
push 1
push esi
push 0x7a9c00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x40358f
push ebx
push esi
call fcn.00405a4c
mov eax, dword [0x7a27d0]
push dword [eax + 0x124]
push esi
call fcn.00405d20
push esi
call fcn.0040555e
cmp eax, ebx
je 0x40358f
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x7a3400]
dec ebp
jne 0x403532
push ebx
push edi
call fcn.00405a4c
jmp 0x403480
cmp dword [0x7a2854], ebx
je 0x403647
push 5
call fcn.0040608a
push 6
mov ebp, eax
call fcn.0040608a
push 7
mov esi, eax
call fcn.0040608a
cmp ebp, ebx
mov edi, eax
je 0x403617
cmp esi, ebx
je 0x403617
cmp edi, ebx
je 0x403617
lea eax, [esp + 0x1c]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call ebp
test eax, eax
je 0x403617
lea eax, [esp + 0x24]
push eax
push str.SeShutdownPrivilege
push ebx
call esi
push ebx
push ebx
lea eax, [esp + 0x28]
push ebx
push eax
push ebx
push dword [esp + 0x30]
mov dword [esp + 0x38], 1
mov dword [esp + 0x44], 2
call edi
push 8
call fcn.0040608a
cmp eax, ebx
mov esi, 0x80040002
je 0x403633
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x403640
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403647
push 9
call fcn.0040140b
mov eax, dword [0x7a286c]
cmp eax, 0xffffffff
je 0x403655
mov dword [esp + 0x18], eax
push dword [esp + 0x18]
call dword [sym.imp.KERNEL32.dll_ExitProcess]