Function at 0x18003ddd0
Capabilities:
Get file size
Write file on windows

Disassembly:
mov rax, rsp
push rbp
push rdi
push r14
lea rbp, [rax - 0x5f]
sub rsp, 0xe0
mov qword [rbp - 0x51], 0xfffffffffffffffe
mov qword [rax + 0x18], rbx
mov qword [rax + 0x20], rsi
mov rax, qword [0x180123010]
xor rax, rsp
mov qword [rbp + 0x37], rax
mov rbx, rdx
mov rsi, rcx
xor r14d, r14d
mov qword [rbp - 0x59], r14
lea ecx, [r14 + 8]
call fcn.1800c8ec0
mov qword [rbp - 0x29], rax
mov qword [rax], 0xffffffffffffffff
mov qword [rbp - 0x59], rax
mov dword [rsp + 0x28], 2
mov dword [rsp + 0x20], r14d
mov r9d, 0x40000000
mov r8, rbx
lea rdx, [rbp - 0x59]
call fcn.1800400a0
mov rbx, qword [rbp - 0x59]
test al, al
je 0x18003dff9
test rbx, rbx
je 0x18003de8d
mov rcx, qword [rbx]
cmp rcx, 0xffffffffffffffff
je 0x18003de8d
lea rdx, [rbp - 0x29]
call qword [sym.imp.KERNEL32.dll_GetFileSize]
mov edi, eax
cmp eax, 0xffffffff
jne 0x18003de79
call qword [sym.imp.KERNEL32.dll_GetLastError]
test eax, eax
jne 0x18003de8d
mov ecx, dword [rbp - 0x29]
shl rcx, 0x20
add rcx, rdi
je 0x18003de8d
mov dil, 1
jmp 0x18003dffc
xor eax, eax
mov qword [rbp - 0x41], rax
mov qword [rbp - 0x39], rax
mov qword [rbp - 0x31], rax
xorps xmm0, xmm0
movdqu xmmword [rbp - 0x41], xmm0
mov qword [rbp - 0x31], r14
movdqa xmmword [rbp - 0x19], xmm0
mov qword [rbp - 9], r14
mov qword [rbp - 1], r14
movdqa xmmword [rbp + 7], xmm0
movdqa xmmword [rbp + 0x17], xmm0
mov qword [rbp + 0x27], r14
mov dword [rbp + 0x2f], 0xffffffff
mov rax, qword [rsi + 0x40]
lea rcx, [rbp - 0x19]
cmp qword [rsi + 0x38], rax
jne 0x18003dede
call fcn.18003ce90
jmp 0x18003df0a
lea rdx, [rsi + 0x38]
call fcn.1800417c0
lea rdx, [rsi + 0x50]
lea rcx, [rbp - 1]
call fcn.1800417c0
lea rdx, [rsi + 0x68]
lea rcx, [rbp + 0x17]
call fcn.1800417c0
mov eax, dword [rsi + 0x80]
mov dword [rbp + 0x2f], eax
lea rdx, [rbp - 0x41]
lea rcx, [rbp - 0x19]
call fcn.18003da30
mov dword [rbp - 0x49], r14d
mov rdi, qword [rbp - 0x39]
sub rdi, qword [rbp - 0x41]
test rbx, rbx
jne 0x18003df2d
xor dil, dil
jmp 0x18003df87
cmp qword [rbp - 0x41], 0
jne 0x18003df39
xor dil, dil
jmp 0x18003df6d
mov rcx, qword [rbx]
cmp rcx, 0xffffffffffffffff
jne 0x18003df47
xor dil, dil
jmp 0x18003df6d
mov qword [rsp + 0x20], r14
lea r9, [rbp - 0x49]
mov r8d, edi
mov rdx, qword [rbp - 0x41]
call qword [sym.imp.KERNEL32.dll_WriteFile]
test eax, eax
jne 0x18003df66
xor dil, dil
jmp 0x18003df6d
cmp edi, dword [rbp - 0x49]
sete dil
mov rcx, qword [rbx]
cmp rcx, 0xffffffffffffffff
je 0x18003df87
call qword [sym.imp.KERNEL32.dll_CloseHandle]
test eax, eax
je 0x18003df87
mov qword [rbx], 0xffffffffffffffff
mov rcx, qword [rbp - 0x39]
sub rcx, qword [rbp - 0x41]
mov eax, dword [rbp - 0x49]
cmp rax, rcx
jne 0x18003dfa1
test dil, dil
je 0x18003dfa1
mov dil, 1
jmp 0x18003dfa4
xor dil, dil
lea rcx, [rbp - 0x19]
call fcn.1800401c0
nop
mov rcx, qword [rbp - 0x41]
test rcx, rcx
je 0x18003dffc
mov rdx, qword [rbp - 0x31]
sub rdx, rcx
mov rax, rcx
cmp rdx, 0x1000
jb 0x18003dfe6
add rdx, 0x27
mov rcx, qword [rcx - 8]
sub rax, rcx
add rax, 0xfffffffffffffff8
cmp rax, 0x1f
jbe 0x18003dfe6
call qword [sym.imp.api_ms_win_crt_runtime_l1_1_0.dll__invalid_parameter_noinfo_noreturn]
int3
call fcn.1800c8c14
xorps xmm0, xmm0
movdqu xmmword [rbp - 0x41], xmm0
mov qword [rbp - 0x31], r14
jmp 0x18003dffc
xor dil, dil
test rbx, rbx
je 0x18003e028
mov rcx, qword [rbx]
lea r8, [rcx - 1]
cmp r8, 0xfffffffffffffffd
ja 0x18003e017
call qword [sym.imp.KERNEL32.dll_CloseHandle]
mov qword [rbx], r14
mov edx, 8
mov rcx, rbx
call fcn.1800c8c14
mov qword [rbp - 0x59], r14
movzx eax, dil
mov rcx, qword [rbp + 0x37]
xor rcx, rsp
call fcn.1800c8bf0
lea r11, [rsp + 0xe0]
mov rbx, qword [r11 + 0x30]
mov rsi, qword [r11 + 0x38]
mov rsp, r11
pop r14
pop rdi
pop rbp
ret