Function at 0x1400a2890
Capabilities:
Encode data using xor
Generate random numbers using a mersenne twister

Disassembly:
mov qword [rsp + 0x10], rbx
mov qword [rsp + 0x18], rbp
push rsi
push rdi
push r14
sub rsp, 0xa00
mov rbx, rcx
mov qword [rsp + 0x38], rcx
xor r14d, r14d
mov dword [rsp + 0x24], r14d
mov esi, 4
mov rax, qword gs:[0x58]
add rsi, qword [rax]
mov eax, dword [rsi]
cmp dword [0x1401fd224], eax
jle 0x1400a29a8
lea rcx, [0x1401fd224]
call fcn.14012b128
cmp dword [0x1401fd224], 0xffffffff
jne 0x1400a29a8
xorps xmm0, xmm0
xor eax, eax
movups xmmword [0x1401fecb0], xmm0
mov qword [0x1401fecc0], rax
call qword [sym.imp.MSVCP140.dll_unsigned_int___cdecl_std::_Random_device_void_]
mov dword [rsp + 0x28], eax
call qword [sym.imp.MSVCP140.dll_unsigned_int___cdecl_std::_Random_device_void_]
mov dword [rsp + 0x2c], eax
call qword [sym.imp.MSVCP140.dll_unsigned_int___cdecl_std::_Random_device_void_]
mov dword [rsp + 0x30], eax
call qword [sym.imp.MSVCP140.dll_unsigned_int___cdecl_std::_Random_device_void_]
mov dword [rsp + 0x34], eax
xorps xmm0, xmm0
movdqu xmmword [0x1401fecb0], xmm0
mov ecx, r14d
mov qword [0x1401fecc0], rcx
lea rdi, [rsp + 0x28]
nop dword [rax]
nop word [rax + rax]
mov eax, dword [rdi]
mov dword [rsp + 0x20], eax
mov rdx, qword [0x1401fecb8]
cmp rdx, rcx
je 0x1400a296e
mov dword [rdx], eax
add qword [0x1401fecb8], 4
jmp 0x1400a2978
lea r8, [rsp + 0x20]
call fcn.1400ef860
add rdi, 4
lea rax, [rsp + 0x38]
cmp rdi, rax
je 0x1400a298f
mov rcx, qword [0x1401fecc0]
jmp 0x1400a2950
lea rcx, [0x1401372f0]
call fcn.14012b024
nop
lea rcx, [0x1401fd224]
call fcn.14012b0bc
lea rbp, [0x1401fd8e0]
mov eax, dword [rsi]
cmp dword [0x1401ff20c], eax
jle 0x1400a2a89
lea rcx, [0x1401ff20c]
call fcn.14012b128
cmp dword [0x1401ff20c], 0xffffffff
jne 0x1400a2a89
mov dword [0x1401fec64], 0xffffffff
mov edx, 0x1571
mov dword [0x1401fd8e4], edx
mov ecx, 1
mov eax, edx
shr eax, 0x1e
xor eax, edx
imul edx, eax, 0x6c078965
add edx, ecx
mov dword [rbp + rcx*4 + 4], edx
inc rcx
cmp rcx, 0x270
jb 0x1400a29f0
mov dword [0x1401fd8e0], 0x270
lea r8, [rsp + 0xa00]
lea rdx, [rsp + 0x40]
call fcn.1400ed9c0
mov edx, r14d
mov r8, r14
nop dword [rax]
nop word [rax + rax]
mov ecx, dword [rsp + r8*4 + 0x40]
mov dword [rbp + r8*4 + 4], ecx
mov eax, ecx
or eax, edx
mov edx, ecx
shr edx, 0x1f
test r8, r8
cmovne edx, eax
inc r8
cmp r8, 0x270
jb 0x1400a2a40
test edx, edx
jne 0x1400a2a73
mov dword [0x1401fd8e4], 0x80000000
mov dword [0x1401fd8e0], 0x270
lea rcx, [0x1401ff20c]
call fcn.14012b0bc
xorps xmm0, xmm0
movups xmmword [rbx], xmm0
mov qword [rbx + 0x10], r14
mov qword [rbx + 0x18], reloc.WS2_32.dll_ntohs
mov byte [rbx], 0
mov dword [rsp + 0x24], 1
mov edi, reloc.WS2_32.dll_recv
movabs rsi, 0x842108421084211
lea r14, str.0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
nop dword [rax]
mov rcx, rbp
call fcn.1400e2f10
mov ecx, eax
mov rax, rsi
mul rcx
mov eax, ecx
sub rax, rdx
shr rax, 1
add rax, rdx
shr rax, 5
imul rax, rax, 0x3e
sub rcx, rax
movzx r9d, byte [rcx + r14]
mov rcx, qword [rbx + 0x10]
mov rdx, qword [rbx + 0x18]
cmp rcx, rdx
jae 0x1400a2b17
lea rax, [rcx + 1]
mov qword [rbx + 0x10], rax
mov rax, rbx
cmp rdx, 0xf
jbe 0x1400a2b0c
mov rax, qword [rbx]
mov byte [rax + rcx], r9b
mov byte [rax + rcx + 1], 0
jmp 0x1400a2b1f
mov rcx, rbx
call fcn.140017150
sub rdi, 1
jne 0x1400a2ac0
mov rax, rbx
lea r11, [rsp + 0xa00]
mov rbx, qword [r11 + 0x28]
mov rbp, qword [r11 + 0x30]
mov rsp, r11
pop r14
pop rdi
pop rsi
ret