Function at 0x51aa1c
Capabilities:
Encrypt data using rc4 ksa

Disassembly:
push ebp
mov ebp, esp
add esp, 0xffffffb0
push ebx
push esi
push edi
mov dword [ebp - 0xc], ecx
mov dword [ebp - 8], edx
mov dword [ebp - 4], eax
mov eax, dword [ebp - 4]
mov eax, dword [eax + 4]
mov edx, dword [ebp - 4]
movzx edx, word [edx + 0xe]
imul edx
call fcn.0051a644
mov dword [ebp - 0x18], eax
mov eax, dword [ebp - 0x18]
add eax, 0xd400
add eax, 0x4000
mov dword [ebp - 0x2c], eax
mov eax, dword [ebp - 0x2c]
call fcn.004c6a9c
mov dword [ebp - 0x3c], eax
push ebp
push 0x51ae8a
push dword fs:[0]
mov dword fs:[0], esp
mov eax, dword [ebp - 4]
mov eax, dword [eax + 4]
mov edx, dword [ebp - 4]
imul dword [edx + 8]
add eax, eax
call fcn.004c6a9c
mov dword [ebp - 0x40], eax
push ebp
push 0x51ae6d
push dword fs:[0]
mov dword fs:[0], esp
mov eax, dword [ebp - 0x3c]
mov dword [ebp - 0x4c], eax
mov edx, 0xc000
mov eax, dword [ebp - 0x3c]
call fcn.004c6af4
mov dword [ebp - 0x48], eax
mov edx, 0xd400
mov eax, dword [ebp - 0x3c]
call fcn.004c6af4
mov dword [ebp - 0x14], eax
xor ebx, ebx
lea eax, [ebx + ebx*2]
mov edx, dword [ebp - 0x4c]
mov ecx, ebx
shr ecx, 8
mov byte [edx + eax*4], cl
mov edx, dword [ebp - 0x4c]
mov ecx, ebx
shr ecx, 4
and cl, 0xf
mov byte [edx + eax*4 + 1], cl
mov edx, dword [ebp - 0x4c]
mov ecx, ebx
and cl, 0xf
mov byte [edx + eax*4 + 2], cl
mov edx, dword [ebp - 0x4c]
xor ecx, ecx
mov dword [edx + eax*4 + 4], ecx
inc ebx
cmp ebx, 0x1000
jne 0x51aac6
mov eax, dword [ebp - 0x40]
mov dword [ebp - 0x44], eax
mov eax, dword [ebp - 4]
mov eax, dword [eax + 8]
dec eax
test eax, eax
jl 0x51abc1
inc eax
mov dword [ebp - 0x50], eax
xor ebx, ebx
mov edx, dword [ebp - 4]
mov edx, dword [edx + 8]
dec edx
sub edx, ebx
imul edx, dword [ebp - 0x18]
mov eax, dword [ebp - 8]
call fcn.004c6af4
mov edx, eax
mov ecx, dword [ebp - 0x18]
mov eax, dword [ebp - 0x14]
call fcn.004c6afc
mov esi, dword [ebp - 0x14]
mov edi, dword [ebp - 4]
mov edi, dword [edi + 4]
dec edi
test edi, edi
jl 0x51abb7
inc edi
mov al, byte [esi + 2]
and al, 0xf0
and eax, 0xff
shl eax, 4
mov dl, byte [esi + 1]
and dl, 0xf0
and edx, 0xff
add ax, dx
mov dl, byte [esi]
and dl, 0xf0
and edx, 0xff
shr edx, 4
add ax, dx
mov word [ebp - 0x22], ax
movzx eax, word [ebp - 0x22]
lea eax, [eax + eax*2]
mov edx, dword [ebp - 0x4c]
inc dword [edx + eax*4 + 4]
mov edx, 3
mov eax, esi
call fcn.004c6af4
mov esi, eax
mov eax, dword [ebp - 0x44]
mov dx, word [ebp - 0x22]
mov word [eax], dx
mov edx, 2
mov eax, dword [ebp - 0x44]
call fcn.004c6af4
mov dword [ebp - 0x44], eax
dec edi
jne 0x51ab4d
inc ebx
dec dword [ebp - 0x50]
jne 0x51ab1c
xor ebx, ebx
lea eax, [ebx + ebx*4]
mov edx, dword [ebp - 0x48]
xor ecx, ecx
mov dword [edx + eax*4 + 0x10], ecx
mov edx, dword [ebp - 0x48]
xor ecx, ecx
mov dword [edx + eax*4 + 0xc], ecx
mov edx, dword [ebp - 0x48]
xor ecx, ecx
mov dword [edx + eax*4 + 8], ecx
xor ecx, ecx
lea eax, [ebx + ebx*4]
mov edx, dword [ebp - 0x48]
lea edx, [edx + eax*4]
mov byte [edx + ecx], 0
mov edx, dword [ebp - 0x48]
lea eax, [edx + eax*4]
mov byte [eax + ecx + 3], 0xff
inc ecx
cmp ecx, 3
jne 0x51abe3
inc ebx
cmp ebx, 0x100
jne 0x51abc3
xor ebx, ebx
lea eax, [ebx + ebx*2]
mov edx, dword [ebp - 0x4c]
cmp dword [edx + eax*4 + 4], 0
jg 0x51ac22
inc ebx
cmp ebx, 0x1000
jl 0x51ac0c
lea eax, [ebx + ebx*2]
mov edx, dword [ebp - 0x4c]
lea eax, [edx + eax*4]
lea edx, [ebx + ebx*2]
mov ecx, dword [ebp - 0x4c]
lea edx, [ecx + edx*4]
mov ecx, dword [ebp - 0x48]
mov dword [ecx + 0x10], edx
mov ecx, 1
inc ebx
cmp ebx, 0x1000
jge 0x51ac6e
lea edx, [ebx + ebx*2]
mov esi, dword [ebp - 0x4c]
cmp dword [esi + edx*4 + 4], 0
jle 0x51ac65
mov esi, dword [ebp - 0x4c]
lea esi, [esi + edx*4]
mov dword [eax + 8], esi
mov eax, dword [ebp - 0x4c]
lea eax, [eax + edx*4]
inc ecx
inc ebx
cmp ebx, 0x1000
jl 0x51ac48
xor edx, edx
mov dword [eax + 8], edx
mov eax, dword [ebp - 0x48]
mov dword [eax + 8], ecx
mov eax, dword [ebp - 4]
mov eax, dword [eax + 4]
mov edx, dword [ebp - 4]
imul dword [edx + 8]
mov edx, dword [ebp - 0x48]
mov dword [edx + 0xc], eax
mov dword [ebp - 0x28], 1
mov edx, dword [ebp - 0x18]
add edx, 0xd400
mov eax, dword [ebp - 0x3c]
call fcn.004c6af4
push eax
lea ecx, [ebp - 0x28]
mov edx, dword [ebp + 0xc]
mov edx, dword [edx]
mov eax, dword [ebp - 0x48]
call fcn.0051a7d4
mov eax, dword [ebp + 0xc]
mov eax, dword [eax]
cmp eax, dword [ebp - 0x28]
jle 0x51aceb
mov ebx, dword [ebp - 0x28]
mov eax, dword [ebp + 0xc]
mov eax, dword [eax]
dec eax
sub eax, ebx
jl 0x51aceb
inc eax
mov dword [ebp - 0x50], eax
mov eax, dword [ebp + 8]
lea esi, [eax + ebx*4]
mov eax, esi
xor ecx, ecx
mov edx, 4
call fcn.00402ee0
add esi, 4
dec dword [ebp - 0x50]
jne 0x51acd5
mov eax, dword [ebp - 0x28]
dec eax
test eax, eax
jl 0x51adab
inc eax
mov dword [ebp - 0x50], eax
xor ebx, ebx
mov esi, dword [ebp + 8]
lea eax, [ebx + ebx*4]
mov edx, dword [ebp - 0x48]
mov ecx, dword [edx + eax*4 + 8]
test ecx, ecx
jle 0x51ad9e
mov edx, dword [ebp - 0x48]
mov eax, dword [edx + eax*4 + 0x10]
xor edx, edx
mov dword [ebp - 0x30], edx
xor edx, edx
mov dword [ebp - 0x34], edx
xor edx, edx
mov dword [ebp - 0x38], edx
test eax, eax
je 0x51ad4d
mov byte [eax + 3], bl
xor edx, edx
mov dl, byte [eax]
add dword [ebp - 0x30], edx
xor edx, edx
mov dl, byte [eax + 1]
add dword [ebp - 0x34], edx
xor edx, edx
mov dl, byte [eax + 2]
add dword [ebp - 0x38], edx
mov eax, dword [eax + 8]
test eax, eax
jne 0x51ad2c
mov edi, esi
mov eax, dword [ebp - 0x30]
shl eax, 4
or eax, 0xf
cdq
idiv ecx
mov byte [edi + 2], al
mov eax, dword [ebp - 0x34]
shl eax, 4
or eax, 0xf
cdq
idiv ecx
mov byte [edi + 1], al
mov eax, dword [ebp - 0x38]
shl eax, 4
or eax, 0xf
cdq
idiv ecx
mov byte [edi], al
mov byte [edi + 3], 0
cmp byte [edi + 2], 0x10
ja 0x51ad9e
cmp byte [edi + 1], 0x10
ja 0x51ad9e
cmp byte [edi], 0x10
ja 0x51ad9e
mov eax, esi
xor ecx, ecx
mov edx, 4
call fcn.00402ee0
inc ebx
add esi, 4
dec dword [ebp - 0x50]
jne 0x51ad00
mov eax, dword [ebp - 4]
mov eax, dword [eax + 4]
add eax, eax
mov dword [ebp - 0x1c], eax
mov eax, dword [ebp - 4]
mov eax, dword [eax + 4]
shl eax, 3
call fcn.0051a644
mov dword [ebp - 0x20], eax
mov edx, dword [ebp - 4]
mov edx, dword [edx + 8]
imul edx, dword [ebp - 0x20]
mov eax, dword [ebp - 0xc]
call fcn.00408d9c
mov eax, dword [ebp - 4]
mov eax, dword [eax + 8]
dec eax
test eax, eax
jl 0x51ae57
inc eax
mov dword [ebp - 0x50], eax
xor ebx, ebx
mov edx, dword [ebp - 4]
mov edx, dword [edx + 8]
dec edx
sub edx, ebx
imul edx, dword [ebp - 0x1c]
mov eax, dword [ebp - 0x40]
call fcn.004c6af4
mov dword [ebp - 0x14], eax
mov edx, ebx
imul edx, dword [ebp - 0x20]
mov eax, dword [ebp - 0xc]
call fcn.004c6af4
mov esi, eax
mov edi, dword [ebp - 4]
mov edi, dword [edi + 4]
dec edi
test edi, edi
jl 0x51ae51
inc edi
mov eax, dword [ebp - 0x14]
movzx eax, word [eax]
lea eax, [eax + eax*2]
mov edx, dword [ebp - 0x4c]
mov al, byte [edx + eax*4 + 3]
mov byte [esi], al
mov edx, 2
mov eax, dword [ebp - 0x14]
call fcn.004c6af4
mov dword [ebp - 0x14], eax
mov edx, 1
mov eax, esi
call fcn.004c6af4
mov esi, eax
dec edi
jne 0x51ae1e
inc ebx
dec dword [ebp - 0x50]
jne 0x51adea
xor eax, eax
pop edx
pop ecx
pop ecx
mov dword fs:[eax], edx
push 0x51ae74
lea eax, [ebp - 0x40]
call fcn.004c6abc
ret