Function at 0x140005800
Capabilities:
Encode data using xor
Generate random numbers using a mersenne twister

Disassembly:
mov qword [rsp + 0x10], rbx
mov qword [rsp + 0x18], rsi
mov qword [rsp + 0x20], rdi
push rbp
push r12
push r13
push r14
push r15
lea rbp, [rsp - 0x1300]
mov eax, 0x1400
call fcn.14007d750
sub rsp, rax
mov rax, qword [0x14009f080]
xor rax, rsp
mov qword [rbp + 0x12f0], rax
mov rsi, rcx
mov qword [rsp + 0x30], rcx
xor edi, edi
mov dword [rsp + 0x20], edi
xorps xmm0, xmm0
movups xmmword [rsp + 0x38], xmm0
mov qword [rsp + 0x48], rdi
mov qword [rsp + 0x50], rdi
lea r8d, [rdi + 0x1a]
lea rdx, str.ABCDEFGHIJKLMNOPQRSTUVWXYZ
lea rcx, [rsp + 0x38]
call fcn.14000c280
nop
xorps xmm0, xmm0
movups xmmword [rsi], xmm0
mov qword [rsi + 0x10], rdi
mov qword [rsi + 0x18], reloc.WS2_32.dll_ntohs
mov byte [rsi], dil
mov dword [rsp + 0x20], 1
call qword [sym.imp.MSVCP140.dll_unsigned_int___cdecl_std::_Random_device_void_]
mov edx, eax
mov dword [rbp + 0x12e4], 0xffffffff
mov dword [rsp + 0x64], eax
lea ecx, [rdi + 1]
nop word [rax + rax]
mov eax, edx
shr eax, 0x1e
xor eax, edx
imul edx, eax, 0x6c078965
add edx, ecx
mov dword [rsp + rcx*4 + 0x64], edx
inc rcx
cmp rcx, 0x270
jb 0x1400058b0
mov ebx, 0x270
mov dword [rsp + 0x60], ebx
mov r15d, dword [rsp + 0x48]
dec r15d
mov r12d, 3
mov r13, qword [rsp + 0x50]
mov r14, qword [rsp + 0x38]
cmp r15d, 0xffffffff
jne 0x140005a82
cmp ebx, 0x270
jne 0x140005952
lea r8, [rsp + 0x68]
mov r9d, ebx
nop word [rax + rax]
mov edx, dword [r8 - 4]
xor edx, dword [r8]
btr edx, 0x1f
xor edx, dword [r8 - 4]
mov eax, edx
and al, 1
neg al
sbb ecx, ecx
and ecx, 0x9908b0df
xor ecx, dword [r8 + 0x630]
shr edx, 1
xor ecx, edx
mov dword [r8 + 0x9bc], ecx
lea r8, [r8 + 4]
sub r9, 1
jne 0x140005910
mov ebx, dword [rsp + 0x60]
jmp 0x140005a48
cmp ebx, 0x4e0
jb 0x140005a48
mov r8, rdi
lea r9, [rbp + 0x924]
lea r10, [rbp + 0xf58]
lea r11, [rsp + 0x64]
nop dword [rax]
nop dword [rax + rax]
mov edx, dword [r9 + r8*4]
xor edx, dword [rbp + r8*4 + 0x928]
btr edx, 0x1f
xor edx, dword [r9 + r8*4]
mov eax, edx
and al, 1
neg al
sbb ecx, ecx
and ecx, 0x9908b0df
xor ecx, dword [r10 + r8*4]
shr edx, 1
xor ecx, edx
mov dword [r11 + r8*4], ecx
inc r8
cmp r8, 0xe3
jb 0x140005980
mov r8d, 0xe3
lea r9, [rbp + 0x928]
lea r10, [rsp + 0x64]
nop dword [rax]
mov eax, dword [rbp + r8*4 + 0x924]
mov edx, eax
xor edx, dword [r9 + r8*4]
btr edx, 0x1f
xor edx, eax
mov eax, edx
and al, 1
neg al
sbb ecx, ecx
and ecx, 0x9908b0df
xor ecx, dword [rbp + r8*4 - 0x428]
shr edx, 1
xor ecx, edx
mov dword [r10 + r8*4], ecx
inc r8
cmp r8, 0x26f
jb 0x1400059d0
mov edx, dword [rbp + 0x12e0]
and edx, 0x80000000
mov eax, dword [rsp + 0x64]
btr eax, 0x1f
or edx, eax
mov eax, edx
and al, 1
neg al
sbb ecx, ecx
and ecx, 0x9908b0df
shr edx, 1
xor ecx, edx
xor ecx, dword [rbp + 0x594]
mov dword [rbp + 0x920], ecx
mov ebx, edi
mov dword [rsp + 0x60], ebx
mov eax, ebx
mov edx, dword [rsp + rax*4 + 0x64]
inc ebx
mov dword [rsp + 0x60], ebx
mov eax, edx
shr eax, 0xb
and eax, dword [rbp + 0x12e4]
xor edx, eax
mov eax, edx
and eax, 0xff3a58ad
shl eax, 7
xor edx, eax
mov eax, edx
and eax, 0xffffdf8c
shl eax, 0xf
xor edx, eax
mov ecx, edx
shr ecx, 0x12
xor ecx, edx
jmp 0x140005ace
lea ebx, [r15 + 1]
lea rcx, [rsp + 0x60]
call fcn.140014da0
mov edi, ebx
mov ecx, eax
imul rcx, rdi
cmp ecx, ebx
jae 0x140005ac4
mov eax, ebx
neg eax
xor edx, edx
div ebx
mov ebx, edx
cmp ecx, edx
jae 0x140005ac4
nop word [rax + rax]
lea rcx, [rsp + 0x60]
call fcn.140014da0
mov ecx, eax
imul rcx, rdi
cmp ecx, ebx
jb 0x140005ab0
shr rcx, 0x20
mov ebx, dword [rsp + 0x60]
xor edi, edi
lea rdx, [rsp + 0x38]
cmp r13, 0xf
cmova rdx, r14
movsxd rax, ecx
movzx r9d, byte [rax + rdx]
mov rcx, qword [rsi + 0x10]
mov rdx, qword [rsi + 0x18]
cmp rcx, rdx
jae 0x140005b0f
lea rax, [rcx + 1]
mov qword [rsi + 0x10], rax
mov rax, rsi
cmp rdx, 0xf
jbe 0x140005b04
mov rax, qword [rsi]
mov byte [rax + rcx], r9b
mov byte [rax + rcx + 1], 0
jmp 0x140005b1e
xor r8d, r8d
lea edx, [r8 + 1]
mov rcx, rsi
call fcn.14000ca50
sub r12, 1
jne 0x1400058f0
cmp r13, 0xf
jbe 0x140005b62
lea rdx, [r13 + 1]
mov rax, r14
cmp rdx, 0x1000
jb 0x140005b5a
add rdx, 0x27
mov r14, qword [r14 - 8]
sub rax, r14
add rax, 0xfffffffffffffff8
cmp rax, 0x1f
jbe 0x140005b5a
call qword [sym.imp.api_ms_win_crt_runtime_l1_1_0.dll__invalid_parameter_noinfo_noreturn]
int3
mov rcx, r14
call fcn.14007d21c
mov rax, rsi
mov rcx, qword [rbp + 0x12f0]
xor rcx, rsp
call fcn.14007cf80
lea r11, [rsp + 0x1400]
mov rbx, qword [r11 + 0x38]
mov rsi, qword [r11 + 0x40]
mov rdi, qword [r11 + 0x48]
mov rsp, r11
pop r15
pop r14
pop r13
pop r12
pop rbp
ret