Function at 0x4014db
Capabilities:
Check if file exists
Delete file
Get common file path
Get file attributes
Parse pe header
Set file attributes
Terminate process

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x62c
push ebx
push esi
xor ebx, ebx
push edi
mov word [ebp - 0x424], bx
mov dword [ebp - 0xc], ebx
mov dword [ebp - 4], ebx
call dword [sym.imp.KERNEL32.dll_GetProcessHeap]
mov dword [0x404408], eax
call dword [sym.imp.KERNEL32.dll_GetCurrentProcessId]
mov edi, eax
lea eax, [ebp - 0x14]
push eax
call dword [sym.imp.KERNEL32.dll_GetSystemTimeAsFileTime]
call dword [sym.imp.KERNEL32.dll_GetCurrentThreadId]
mov esi, eax
not esi
xor esi, edi
call dword [sym.imp.KERNEL32.dll_GetTickCount]
xor esi, eax
mov eax, dword [ebp - 0x10]
xor eax, dword [ebp - 0x14]
push 0x104
xor esi, eax
lea eax, [ebp - 0x62c]
push eax
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleFileNameW]
test eax, eax
jne 0x401587
call dword [sym.imp.KERNEL32.dll_GetLastError]
cmp eax, 0x78
jne 0x40156b
push str.This_installer_is_for_Windows_2000_and_later_n
call fcn.0040109e
pop ecx
mov dword [0x40440c], 0xfd
jmp 0x401778
push eax
push str.GetModuleFileName___failed____u_n
call fcn.0040109e
pop ecx
pop ecx
mov dword [0x40440c], 0xff
jmp 0x401778
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
mov ecx, dword [eax + 0x3c]
add ecx, eax
cmp word [eax], 0x5a4d
jne 0x401754
cmp dword [ecx], 0x4550
jne 0x401754
movzx eax, word [ecx + 0x14]
lea ebx, [eax + ecx + 0x18]
movzx eax, word [ecx + 6]
xor edi, edi
test eax, eax
mov dword [ebp - 8], eax
jbe 0x4015ec
mov dword [ebp - 4], ebx
mov ecx, dword [ebp - 4]
push 8
mov edx, str..tsustub
call fcn.00401046
test eax, eax
je 0x4015e1
add dword [ebp - 4], 0x28
inc edi
cmp edi, dword [ebp - 8]
jb 0x4015c2
jmp 0x4015ec
imul edi, edi, 0x28
mov edi, dword [edi + ebx + 0x14]
test edi, edi
jne 0x401606
push str.Executable_has_no_.tsustub_section_n
call fcn.0040109e
pop ecx
mov dword [0x40440c], 0xfe
jmp 0x401778
lea eax, [ebp - 0x424]
push eax
push 0x208
call dword [sym.imp.KERNEL32.dll_GetTempPathW]
test eax, eax
jne 0x40162d
call dword [sym.imp.KERNEL32.dll_GetLastError]
push eax
push str.GetTempPath___failed____u_n
jmp 0x401571
xor ebx, ebx
cmp word [ebp - 0x424], bx
lea eax, [ebp - 0x424]
je 0x401645
inc eax
inc eax
cmp word [eax], bx
jne 0x40163e
push esi
mov esi, dword [sym.imp.USER32.dll_wsprintfW]
push str.Tsu_08lX.dll
push eax
call esi
add esp, 0xc
lea eax, [ebp - 0x424]
push eax
push 0xffffffffffffffff
push 0xffff000f
push edi
lea eax, [ebp - 0x62c]
push eax
call fcn.004010d0
cmp eax, ebx
je 0x40169a
lea ecx, [ebp - 0x424]
push ecx
push eax
push str.Error__u_while_extracting_TSU.DLL_to__ls_n
call fcn.0040109e
add esp, 0xc
mov dword [0x40440c], 0xf9
jmp 0x401778
lea eax, [ebp - 0x424]
push eax
call dword [sym.imp.KERNEL32.dll_LoadLibraryW]
cmp eax, ebx
mov dword [ebp - 4], eax
jne 0x4016d8
call dword [sym.imp.KERNEL32.dll_GetLastError]
lea ecx, [ebp - 0x424]
push ecx
push eax
push str.Error__u_while_loading_TSU.DLL__ls_n
call fcn.0040109e
add esp, 0xc
mov dword [0x40440c], 0xf9
jmp 0x401769
push str._TsuMainW_8
push eax
call dword [sym.imp.KERNEL32.dll_GetProcAddress]
cmp eax, ebx
mov dword [ebp - 8], eax
jne 0x401700
call dword [sym.imp.KERNEL32.dll_GetLastError]
lea ecx, [ebp - 0x424]
push ecx
push eax
push str.Error__u_while_retrieving_entry_point_from__ls_n
jmp 0x4016c1
lea eax, [ebp - 0x62c]
push eax
call dword [sym.imp.KERNEL32.dll_lstrlenW]
add eax, 0x20
push eax
lea eax, [ebp - 0x62c]
push eax
call fcn.004013d6
mov edi, eax
cmp edi, ebx
mov dword [ebp - 0xc], edi
jne 0x40172a
xor eax, eax
jmp 0x401736
cmp word [edi], bx
je 0x401736
inc eax
inc eax
cmp word [eax], bx
jne 0x40172f
lea ecx, [ebp - 0x62c]
push ecx
push str.__d:__s_
push eax
call esi
add esp, 0xc
push ebx
push edi
call dword [ebp - 8]
mov dword [0x40440c], eax
jmp 0x401769
push str.Executable_has_no_valid_MZ_signature_n
call fcn.0040109e
pop ecx
mov dword [0x40440c], 0xfe
cmp dword [ebp - 4], 0
je 0x401778
push dword [ebp - 4]
call dword [sym.imp.KERNEL32.dll_FreeLibrary]
cmp word [ebp - 0x424], 0
je 0x4017d2
lea eax, [ebp - 0x424]
push eax
call dword [sym.imp.KERNEL32.dll_GetFileAttributesW]
cmp eax, 0xffffffff
je 0x4017d2
and eax, 0xfffffffa
push eax
lea eax, [ebp - 0x424]
push eax
call dword [sym.imp.KERNEL32.dll_SetFileAttributesW]
push 0xa
pop esi
lea eax, [ebp - 0x424]
push eax
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
test eax, eax
jne 0x4017d2
call dword [sym.imp.KERNEL32.dll_GetLastError]
cmp eax, 5
jne 0x4017d2
push 0x1f4
call dword [sym.imp.KERNEL32.dll_Sleep]
dec esi
jne 0x4017a8
mov ecx, dword [ebp - 0xc]
call fcn.00401010
push dword [0x40440c]
call dword [sym.imp.KERNEL32.dll_ExitProcess]