Function at 0x40b510
Capabilities:
Encrypt data using rc4 prga

Disassembly:
push ebp
push ebx
push edi
push esi
sub esp, 0x10
mov esi, ecx
test edx, edx
je 0x40b525
push esi
call fcn.0040b820
jmp 0x40b52b
push esi
call fcn.0040bcb0
add esp, 4
lea ebp, [esi + 0x9272]
cmp ebp, dword [esi + 0x28]
jae 0x40b7aa
mov ebx, 1
jmp 0x40b55e
mov ebx, dword [esp]
shr ebx, 1
cmp ebp, dword [esi + 0x28]
jae 0x40b7b0
cmp ebx, 1
jne 0x40b56e
movzx ebx, byte [ebp]
or ebx, 0x100
inc ebp
test bl, 1
jne 0x40b5e0
movzx edi, byte [ebp]
movzx edx, word [esi + edi*2 + 0x8852]
mov eax, dword [esi + 0x44]
mov ecx, eax
shl edx, cl
inc ebp
movzx ecx, byte [esi + edi + 0x8f12]
or edx, dword [esi + 0x48]
mov dword [esi + 0x48], edx
add ecx, eax
mov dword [esi + 0x44], ecx
cmp ecx, 8
jae 0x40b5c1
jmp 0x40b553
shr edx, 8
mov dword [esi + 0x48], edx
add ecx, 0xfffffff8
mov dword [esi + 0x44], ecx
cmp ecx, 7
jbe 0x40b553
mov eax, dword [esi + 0x30]
cmp eax, dword [esi + 0x34]
jae 0x40b5b0
lea ecx, [eax + 1]
mov dword [esi + 0x30], ecx
mov byte [eax], dl
mov ecx, dword [esi + 0x44]
mov edx, dword [esi + 0x48]
jmp 0x40b5b0
movzx eax, byte [ebp]
mov edi, eax
movzx eax, word [eax + eax + 0x44902e]
movzx edx, word [esi + eax*2 + 0x8852]
mov ecx, dword [esi + 0x44]
shl edx, cl
movzx eax, byte [esi + eax + 0x8f12]
add eax, ecx
movzx ecx, byte [ebp + 1]
mov dword [esp + 4], ecx
or edx, dword [esi + 0x48]
mov dword [esp + 0xc], ebp
movzx ebp, byte [ebp + 2]
mov dword [esi + 0x48], edx
mov dword [esi + 0x44], eax
cmp eax, 8
jae 0x40b691
mov dword [esp], ebx
movzx ebx, byte [edi + 0x449288]
and edi, dword [ebx*4 + 0x449244]
mov ecx, eax
shl edi, cl
mov ecx, edi
not ecx
and ecx, edx
xor edi, edx
add edi, edx
mov edx, edi
sub edx, ecx
mov dword [esi + 0x48], edx
add eax, ebx
mov dword [esi + 0x44], eax
cmp eax, 8
jae 0x40b6ca
mov dword [esp + 8], edx
mov edx, ebp
shl edx, 8
add edx, dword [esp + 4]
cmp edx, 0x200
jb 0x40b6f0
lea ecx, [ebp + 0x448fae]
lea ebp, [ebp + 0x449588]
jmp 0x40b6fc
shr edx, 8
mov dword [esi + 0x48], edx
add eax, 0xfffffff8
mov dword [esi + 0x44], eax
cmp eax, 7
jbe 0x40b623
mov ecx, dword [esi + 0x30]
cmp ecx, dword [esi + 0x34]
jae 0x40b680
lea eax, [ecx + 1]
mov dword [esi + 0x30], eax
mov byte [ecx], dl
mov eax, dword [esi + 0x44]
mov edx, dword [esi + 0x48]
jmp 0x40b680
shr edx, 8
mov dword [esi + 0x48], edx
mov ecx, eax
not ecx
and ecx, 8
and eax, 0xfffffff7
sub eax, ecx
mov dword [esi + 0x44], eax
cmp eax, 7
jbe 0x40b653
mov ecx, dword [esi + 0x30]
cmp ecx, dword [esi + 0x34]
jae 0x40b6b0
lea eax, [ecx + 1]
mov dword [esi + 0x30], eax
mov byte [ecx], dl
mov eax, dword [esi + 0x44]
mov edx, dword [esi + 0x48]
jmp 0x40b6b0
lea ebp, [edx + 0x449388]
lea ecx, [edx + 0x448dae]
movzx edi, byte [ecx]
movzx ebx, word [esi + edi*2 + 0x8a92]
mov ecx, eax
shl ebx, cl
or ebx, dword [esp + 8]
movzx ecx, byte [esi + edi + 0x9032]
add ecx, eax
movzx eax, byte [ebp]
mov dword [esi + 0x48], ebx
mov dword [esi + 0x44], ecx
cmp ecx, 8
jae 0x40b791
mov ebp, dword [esp + 0xc]
add ebp, 3
and edx, dword [eax*4 + 0x449244]
shl edx, cl
or edx, ebx
mov dword [esi + 0x48], edx
add ecx, eax
mov dword [esi + 0x44], ecx
cmp ecx, 8
jb 0x40b550
mov ebx, dword [esp]
jmp 0x40b765
shr edx, 8
mov dword [esi + 0x48], edx
add ecx, 0xfffffff8
mov dword [esi + 0x44], ecx
cmp ecx, 7
jbe 0x40b553
mov eax, dword [esi + 0x30]
cmp eax, dword [esi + 0x34]
jae 0x40b750
lea ecx, [eax + 1]
mov dword [esi + 0x30], ecx
mov byte [eax], dl
mov ecx, dword [esi + 0x44]
mov edx, dword [esi + 0x48]
jmp 0x40b750
shr ebx, 8
mov dword [esi + 0x48], ebx
add ecx, 0xfffffff8
mov dword [esi + 0x44], ecx
cmp ecx, 7
jbe 0x40b728
mov ebp, dword [esi + 0x30]
cmp ebp, dword [esi + 0x34]
jae 0x40b780
lea ecx, [ebp + 1]
mov dword [esi + 0x30], ecx
mov byte [ebp], bl
mov ecx, dword [esi + 0x44]
mov ebx, dword [esi + 0x48]
jmp 0x40b780
mov ecx, dword [esi + 0x44]
mov edx, dword [esi + 0x48]
movzx eax, word [esi + 0x8a52]
movzx edi, byte [esi + 0x9012]
shl eax, cl
or eax, edx
mov dword [esi + 0x48], eax
add edi, ecx
mov dword [esi + 0x44], edi
cmp edi, 8
jae 0x40b801
mov ecx, dword [esi + 0x30]
xor eax, eax
cmp ecx, dword [esi + 0x34]
setb al
add esp, 0x10
pop esi
pop edi
pop ebx
pop ebp
ret
shr eax, 8
mov dword [esi + 0x48], eax
add edi, 0xfffffff8
mov dword [esi + 0x44], edi
cmp edi, 7
jbe 0x40b7cf
mov ecx, dword [esi + 0x30]
cmp ecx, dword [esi + 0x34]
jae 0x40b7f0
lea edx, [ecx + 1]
mov dword [esi + 0x30], edx
mov byte [ecx], al
mov edi, dword [esi + 0x44]
mov eax, dword [esi + 0x48]
jmp 0x40b7f0