Function at 0x14003e620
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 - 0x13f0]
mov eax, 0x14f0
call fcn.140049ae0
sub rsp, rax
mov rax, qword [0x140090040]
xor rax, rsp
mov qword [rbp + 0x13e0], rax
mov r12, rcx
mov qword [rsp + 0x28], rcx
xorps xmm0, xmm0
movups xmmword [rsp + 0x30], xmm0
mov qword [rsp + 0x40], 0
mov qword [rsp + 0x48], 0
mov r8d, 0x3e
lea rdx, str.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789
lea rcx, [rsp + 0x30]
call fcn.1400055d0
nop
call fcn.14004887c
mov edx, eax
mov dword [rbp + 0x13d4], 0xffffffff
mov dword [rbp + 0x54], eax
mov ecx, 1
mov eax, edx
shr eax, 0x1e
xor eax, edx
imul edx, eax, 0x6c078965
add edx, ecx
mov dword [rbp + rcx*4 + 0x54], edx
inc rcx
cmp rcx, 0x270
jb 0x14003e6b1
mov ebx, 0x270
mov dword [rbp + 0x50], ebx
mov esi, dword [rsp + 0x40]
dec esi
xor edx, edx
mov r8d, 0xf8
lea rcx, [rsp + 0x50]
call fcn.14006ec30
lea rcx, [rsp + 0x50]
call fcn.140010e50
nop
mov r13d, 8
mov r15, qword [rsp + 0x48]
mov r14, qword [rsp + 0x30]
nop dword [rax + rax]
cmp esi, 0xffffffff
jne 0x14003e89f
cmp ebx, 0x270
jne 0x14003e771
lea r8, [rbp + 0x58]
mov r9d, ebx
nop dword [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 0x14003e730
mov ebx, dword [rbp + 0x50]
jmp 0x14003e866
cmp ebx, 0x4e0
jb 0x14003e866
xor r8d, r8d
lea r9, [rbp + 0xa14]
lea r10, [rbp + 0x1048]
lea r11, [rbp + 0x54]
nop dword [rax]
nop word [rax + rax]
mov edx, dword [r9 + r8*4]
xor edx, dword [rbp + r8*4 + 0xa18]
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 0x14003e7a0
mov r8d, 0xe3
lea r9, [rbp + 0xa18]
lea r10, [rbp + 0x54]
nop dword [rax + rax]
mov eax, dword [rbp + r8*4 + 0xa14]
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 - 0x338]
shr edx, 1
xor ecx, edx
mov dword [r10 + r8*4], ecx
inc r8
cmp r8, 0x26f
jb 0x14003e7f0
mov edx, dword [rbp + 0x13d0]
and edx, 0x80000000
mov eax, dword [rbp + 0x54]
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 + 0x684]
mov dword [rbp + 0xa10], ecx
xor ebx, ebx
mov dword [rbp + 0x50], ebx
mov eax, ebx
mov edx, dword [rbp + rax*4 + 0x54]
inc ebx
mov dword [rbp + 0x50], ebx
mov eax, edx
shr eax, 0xb
and eax, dword [rbp + 0x13d4]
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 0x14003e8df
lea ebx, [rsi + 1]
lea rcx, [rbp + 0x50]
call fcn.140011550
mov edi, ebx
mov ecx, eax
imul rcx, rdi
cmp ecx, ebx
jae 0x14003e8d8
mov eax, ebx
neg eax
xor edx, edx
div ebx
mov ebx, edx
cmp ecx, edx
jae 0x14003e8d8
lea rcx, [rbp + 0x50]
call fcn.140011550
mov ecx, eax
imul rcx, rdi
cmp ecx, ebx
jb 0x14003e8c5
shr rcx, 0x20
mov ebx, dword [rbp + 0x50]
lea rax, [rsp + 0x30]
cmp r15, 0xf
cmova rax, r14
movsxd rdx, ecx
movzx edx, byte [rdx + rax]
lea rcx, [rsp + 0x60]
call fcn.140011270
sub r13, 1
jne 0x14003e710
mov rdx, r12
lea rcx, [rsp + 0x68]
call fcn.140004cd0
nop
lea rcx, [rsp + 0x50]
call fcn.14000fa20
nop
cmp r15, 0xf
jbe 0x14003e953
lea rdx, [r15 + 1]
mov rax, r14
cmp rdx, 0x1000
jb 0x14003e94b
add rdx, 0x27
mov r14, qword [r14 - 8]
sub rax, r14
add rax, 0xfffffffffffffff8
cmp rax, 0x1f
ja 0x14003e986
mov rcx, r14
call fcn.1400491b0
mov rax, r12
mov rcx, qword [rbp + 0x13e0]
xor rcx, rsp
call fcn.140049190
lea r11, [rsp + 0x14f0]
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
call fcn.1400500ac
int3