Function at 0x10100020
Capabilities:
Check if file exists
Delete file
Get file attributes
Get file size
Read file on windows
Set file attributes
Timestomp file
Write file on windows

Disassembly:
sub esp, 0x34
push ebx
mov ebx, dword [sym.imp.KERNEL32.dll_GetLastError]
push ebp
push esi
push edi
xor edi, edi
mov dword [0x10270af8], edi
call ebx
mov dword [0x10270b00], eax
mov eax, dword [esp + 0x50]
cmp eax, edi
je 0x10100046
mov dword [eax], edi
mov esi, dword [esp + 0x48]
cmp esi, edi
je 0x101003a5
cmp word [esi], di
je 0x101003a5
mov ebp, dword [esp + 0x4c]
cmp ebp, edi
je 0x101003a5
cmp word [ebp], di
je 0x101003a5
mov ebx, dword [sym.imp.KERNEL32.dll_GetFileAttributesW]
push esi
call ebx
test al, 0x10
mov dword [esp + 0x28], eax
je 0x101000ab
mov dword [0x10270af8], 0x1d
mov dword [0x10270afc], 0xdda
call dword [sym.imp.KERNEL32.dll_GetLastError]
pop edi
pop esi
mov dword [0x10270b00], eax
pop ebp
xor eax, eax
pop ebx
add esp, 0x34
ret
push ebp
call ebx
cmp eax, 0xffffffff
mov dword [esp + 0x48], eax
je 0x101000e4
test al, 0x10
je 0x101000e4
mov dword [0x10270af8], 0x1e
mov dword [0x10270afc], 0xde4
call dword [sym.imp.KERNEL32.dll_GetLastError]
pop edi
pop esi
mov dword [0x10270b00], eax
pop ebp
xor eax, eax
pop ebx
add esp, 0x34
ret
push edi
push 0x80
push 3
push edi
push 7
push SysReAllocStringLen
push esi
mov dword [esp + 0x30], edi
mov dword [esp + 0x2c], edi
call fcn.1014b1c0
mov ebx, eax
add esp, 0x1c
cmp ebx, 0xffffffff
je 0x10100307
mov eax, dword [esp + 0x48]
cmp eax, 0xffffffff
je 0x10100127
test al, 1
je 0x10100127
and al, 0xfe
push eax
push ebp
call dword [sym.imp.KERNEL32.dll_SetFileAttributesW]
push edi
push 0x80
push 4
push edi
push edi
push 0xc0000000
push ebp
call fcn.1014b1c0
mov ebp, eax
add esp, 0x1c
cmp ebp, 0xffffffff
je 0x10100332
mov ecx, dword [esp + 0x48]
xor eax, eax
cmp ecx, 0xffffffff
lea ecx, [esp + 0x2c]
sete al
mov dword [esp + 0x10], eax
lea edx, [esp + 0x34]
push ecx
lea eax, [esp + 0x40]
push edx
push eax
push ebx
mov dword [esp + 0x4c], edi
mov dword [esp + 0x50], edi
mov dword [esp + 0x44], edi
mov dword [esp + 0x48], edi
mov dword [esp + 0x3c], edi
mov dword [esp + 0x40], edi
call dword [sym.imp.KERNEL32.dll_GetFileTime]
lea ecx, [esp + 0x18]
mov dword [esp + 0x18], edi
push ecx
push ebx
call dword [sym.imp.KERNEL32.dll_GetFileSize]
mov edx, dword [esp + 0x18]
push edx
push eax
push ebp
call fcn.1014b180
add esp, 0xc
test eax, eax
je 0x10100356
mov esi, dword [sym.imp.KERNEL32.dll_SetFilePointer]
push edi
push edi
push edi
push ebx
mov dword [esp + 0x20], 1
call esi
push edi
push edi
push edi
push ebp
call esi
push 0x1000
call fcn.1006625a
add esp, 4
mov esi, eax
mov dword [esp + 0x20], edi
mov dword [esp + 0x48], edi
mov ecx, 0x400
xor eax, eax
mov edi, esi
rep stosd dword es:[edi], eax
xor edi, edi
lea eax, [esp + 0x1c]
push edi
push eax
push 0x1000
push esi
push ebx
mov dword [esp + 0x30], edi
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
je 0x10100229
mov eax, dword [esp + 0x1c]
cmp eax, edi
je 0x1010023f
lea ecx, [esp + 0x24]
push edi
push ecx
push eax
push esi
push ebp
mov dword [esp + 0x38], edi
call dword [sym.imp.KERNEL32.dll_WriteFile]
test eax, eax
je 0x10100249
jmp 0x101001e0
mov dword [0x10270af8], 0xd
mov dword [0x10270afc], 0xe38
jmp 0x1010025d
mov dword [esp + 0x20], 1
jmp 0x10100270
mov dword [0x10270af8], 0xe
mov dword [0x10270afc], 0xe46
call dword [sym.imp.KERNEL32.dll_GetLastError]
mov dword [0x10270b00], eax
mov dword [esp + 0x48], 1
push esi
call fcn.10066289
add esp, 4
push ebp
call dword [sym.imp.KERNEL32.dll_SetEndOfFile]
cmp dword [esp + 0x20], edi
je 0x101002c3
mov eax, dword [esp + 0x48]
test eax, eax
jne 0x101002c3
mov al, byte [esp + 0x54]
mov dword [esp + 0x14], 1
test al, 1
je 0x101002b4
lea edx, [esp + 0x2c]
lea eax, [esp + 0x34]
push edx
lea ecx, [esp + 0x40]
push eax
push ecx
push ebp
call dword [sym.imp.KERNEL32.dll_SetFileTime]
mov eax, dword [esp + 0x58]
test eax, eax
je 0x101002c3
push ebp
call dword [sym.imp.KERNEL32.dll_FlushFileBuffers]
xor edi, edi
mov esi, dword [sym.imp.KERNEL32.dll_CloseHandle]
push ebx
call esi
cmp ebp, 0xffffffff
je 0x101002d6
push ebp
call esi
cmp dword [esp + 0x14], edi
je 0x1010037a
test byte [esp + 0x54], 2
je 0x10100399
mov edx, dword [esp + 0x28]
mov eax, dword [esp + 0x4c]
push edx
push eax
call dword [sym.imp.KERNEL32.dll_SetFileAttributesW]
mov eax, dword [esp + 0x14]
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x34
ret
mov dword [0x10270af8], 3
mov dword [0x10270afc], 0xdfc
call dword [sym.imp.KERNEL32.dll_GetLastError]
pop edi
pop esi
mov dword [0x10270b00], eax
mov eax, dword [esp + 0xc]
pop ebp
pop ebx
add esp, 0x34
ret
mov dword [0x10270af8], 4
mov dword [0x10270afc], 0xe0f
call dword [sym.imp.KERNEL32.dll_GetLastError]
mov dword [0x10270b00], eax
jmp 0x101002c5
mov dword [0x10270af8], 0x25
mov dword [0x10270afc], 0xe22
call dword [sym.imp.KERNEL32.dll_GetLastError]
mov dword [0x10270b00], eax
jmp 0x101002c5
cmp dword [esp + 0x10], edi
je 0x10100399
mov eax, dword [esp + 0x50]
cmp eax, edi
je 0x1010038e
mov dword [eax], 1
mov ecx, dword [esp + 0x4c]
push ecx
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
mov eax, dword [esp + 0x14]
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x34
ret
mov dword [0x10270af8], 1
mov dword [0x10270afc], 0xdd2
call ebx
pop edi
pop esi
mov dword [0x10270b00], eax
pop ebp
xor eax, eax
pop ebx
add esp, 0x34
ret