Function at 0x140020590
Capabilities:
Encode data using xor
Encrypt data using aes
Reference aes constants

Disassembly:
mov qword [rsp + 0x10], rbx
mov qword [rsp + 0x18], rbp
mov qword [rsp + 0x20], rsi
push rdi
push r12
push r13
push r14
push r15
mov r12, rdx
mov rsi, rcx
sub r12, rcx
mov r9d, 4
nop word [rax + rax]
mov r8d, 4
nop word [rax + rax]
movzx eax, byte [r12 + rcx]
xor byte [rcx], al
inc rcx
sub r8, 1
jne 0x1400205d0
sub r9, 1
jne 0x1400205c0
lea rbp, [r12 + 0x10]
mov qword [rsp + 0x30], sendto
lea r10, [0x1400743b0]
nop dword [rax + rax]
mov r8, rsi
mov r9d, 4
nop dword [rax]
mov rcx, r8
mov edx, 4
nop dword [rax + rax]
movzx eax, byte [rcx]
lea rcx, [rcx + 4]
movzx eax, byte [rax + r10]
mov byte [rcx - 4], al
sub rdx, 1
jne 0x140020620
inc r8
sub r9, 1
jne 0x140020610
movzx eax, byte [rsi + 5]
lea r14, [rsi + 2]
movzx ecx, byte [rsi + 1]
lea r15d, [rdx + 4]
mov byte [rsi + 1], al
movzx eax, byte [rsi + 9]
mov byte [rsi + 5], al
movzx eax, byte [rsi + 0xd]
mov byte [rsi + 9], al
movzx eax, byte [rsi + 0xa]
mov byte [rsi + 0xd], cl
movzx ecx, byte [rsi + 2]
mov byte [rsi + 2], al
movzx eax, byte [rsi + 0xe]
mov byte [rsi + 0xa], cl
movzx ecx, byte [rsi + 6]
mov byte [rsi + 6], al
movzx eax, byte [rsi + 0xf]
mov byte [rsi + 0xe], cl
movzx ecx, byte [rsi + 3]
mov byte [rsi + 3], al
movzx eax, byte [rsi + 0xb]
mov byte [rsi + 0xf], al
movzx eax, byte [rsi + 7]
mov byte [rsi + 0xb], al
mov byte [rsi + 7], cl
nop word [rax + rax]
movzx edi, byte [r14 - 2]
movzx r8d, byte [r14 - 1]
movzx edx, dil
movzx ebx, byte [r14 + 1]
xor dl, r8b
movzx r10d, byte [r14]
lea r14, [r14 + 4]
movzx eax, dl
movzx r9d, bl
shr al, 7
add dl, dl
movzx eax, al
xor r9b, r10b
imul ecx, eax, 0x1b
movzx r11d, r9b
xor r11b, dil
xor r11b, r8b
xor cl, dl
movzx edx, r8b
xor cl, dil
xor dl, r10b
xor cl, r11b
movzx eax, dl
mov byte [r14 - 6], cl
xor dil, bl
shr al, 7
add dl, dl
movzx eax, al
imul ecx, eax, 0x1b
movzx eax, r9b
shr al, 7
add r9b, r9b
movzx eax, al
xor cl, dl
xor cl, r8b
xor cl, r11b
mov byte [r14 - 5], cl
imul ecx, eax, 0x1b
movzx eax, dil
shr al, 7
add dil, dil
movzx eax, al
xor cl, r9b
xor cl, r10b
xor cl, r11b
mov byte [r14 - 4], cl
imul ecx, eax, 0x1b
xor cl, dil
xor cl, bl
xor cl, r11b
mov byte [r14 - 3], cl
sub r15, 1
jne 0x1400206a0
mov rax, rsi
lea r8d, [r15 + 4]
nop word [rax + rax]
mov edx, 4
nop word [rax + rax]
movzx ecx, byte [rax + rbp]
xor byte [rax], cl
inc rax
sub rdx, 1
jne 0x140020770
sub r8, 1
jne 0x140020760
add rbp, 0x10
lea r10, [0x1400743b0]
sub qword [rsp + 0x30], 1
jne 0x140020600
mov r8, rsi
lea r9d, [rdx + 4]
lea r10, [0x1400743b0]
nop word [rax + rax]
mov rcx, r8
mov edx, 4
nop dword [rax + rax]
movzx eax, byte [rcx]
lea rcx, [rcx + 4]
movzx eax, byte [rax + r10]
mov byte [rcx - 4], al
sub rdx, 1
jne 0x1400207c0
inc r8
sub r9, 1
jne 0x1400207b0
movzx eax, byte [rsi + 5]
lea edx, [r9 + 4]
movzx ecx, byte [rsi + 1]
mov byte [rsi + 1], al
movzx eax, byte [rsi + 9]
mov byte [rsi + 5], al
movzx eax, byte [rsi + 0xd]
mov byte [rsi + 9], al
movzx eax, byte [rsi + 0xa]
mov byte [rsi + 0xd], cl
movzx ecx, byte [rsi + 2]
mov byte [rsi + 2], al
movzx eax, byte [rsi + 0xe]
mov byte [rsi + 0xa], cl
movzx ecx, byte [rsi + 6]
mov byte [rsi + 6], al
movzx eax, byte [rsi + 0xf]
mov byte [rsi + 0xe], cl
movzx ecx, byte [rsi + 3]
mov byte [rsi + 3], al
movzx eax, byte [rsi + 0xb]
mov byte [rsi + 0xf], al
movzx eax, byte [rsi + 7]
mov byte [rsi + 0xb], al
mov byte [rsi + 7], cl
nop word [rax + rax]
mov ecx, 4
nop word [rax + rax]
movzx eax, byte [r12 + rsi + 0xe0]
xor byte [rsi], al
inc rsi
sub rcx, 1
jne 0x140020850
sub rdx, 1
jne 0x140020840
mov rbx, qword [rsp + 0x38]
mov rbp, qword [rsp + 0x40]
mov rsi, qword [rsp + 0x48]
pop r15
pop r14
pop r13
pop r12
pop rdi
ret