Function at 0x40a770
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 0x40a785
push esi
call fcn.0040aa70
jmp 0x40a78b
push esi
call fcn.0040af30
add esp, 4
lea ebp, [esi + 0x9272]
cmp ebp, dword [esi + 0x28]
jae 0x40a9fa
mov ebx, 1
jmp 0x40a7be
mov ebx, dword [esp]
shr ebx, 1
cmp ebp, dword [esi + 0x28]
jae 0x40aa00
cmp ebx, 1
jne 0x40a7ce
movzx ebx, byte [ebp]
inc ebp
or ebx, 0x100
test bl, 1
jne 0x40a840
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 0x40a821
jmp 0x40a7b3
shr edx, 8
mov dword [esi + 0x48], edx
add ecx, 0xfffffff8
mov dword [esi + 0x44], ecx
cmp ecx, 7
jbe 0x40a7b3
mov eax, dword [esi + 0x30]
cmp eax, dword [esi + 0x34]
jae 0x40a810
lea ecx, [eax + 1]
mov dword [esi + 0x30], ecx
mov byte [eax], dl
mov ecx, dword [esi + 0x44]
mov edx, dword [esi + 0x48]
jmp 0x40a810
mov dword [esp], ebx
movzx eax, byte [ebp]
mov edi, eax
movzx eax, word [eax + eax + 0x44602e]
movzx edx, word [esi + eax*2 + 0x8852]
mov ecx, dword [esi + 0x44]
shl edx, cl
movzx eax, byte [esi + eax + 0x8f12]
mov ebx, ecx
and ebx, eax
xor ecx, eax
movzx eax, byte [ebp + 1]
mov dword [esp + 4], eax
or edx, dword [esi + 0x48]
lea eax, [ecx + ebx*2]
mov dword [esp + 0xc], ebp
movzx ebp, byte [ebp + 2]
mov dword [esi + 0x48], edx
mov dword [esi + 0x44], eax
cmp eax, 8
jae 0x40a8f1
movzx ebx, byte [edi + 0x446288]
and edi, dword [ebx*4 + 0x446244]
mov ecx, eax
shl edi, cl
or edi, edx
mov edx, edi
mov dword [esi + 0x48], edi
add eax, ebx
mov dword [esi + 0x44], eax
cmp eax, 8
jae 0x40a921
mov dword [esp + 8], edx
mov edx, ebp
shl edx, 8
add edx, dword [esp + 4]
cmp edx, 0x200
jb 0x40a940
lea ecx, [ebp + 0x445fae]
lea ebp, [ebp + 0x446588]
jmp 0x40a94c
shr edx, 8
mov dword [esi + 0x48], edx
add eax, 0xfffffff8
mov dword [esi + 0x44], eax
cmp eax, 7
jbe 0x40a88d
mov ecx, dword [esi + 0x30]
cmp ecx, dword [esi + 0x34]
jae 0x40a8e0
lea eax, [ecx + 1]
mov dword [esi + 0x30], eax
mov byte [ecx], dl
mov eax, dword [esi + 0x44]
mov edx, dword [esi + 0x48]
jmp 0x40a8e0
shr edx, 8
mov dword [esi + 0x48], edx
add eax, 0xfffffff8
mov dword [esi + 0x44], eax
cmp eax, 7
jbe 0x40a8b0
mov ecx, dword [esi + 0x30]
cmp ecx, dword [esi + 0x34]
jae 0x40a910
lea eax, [ecx + 1]
mov dword [esi + 0x30], eax
mov byte [ecx], dl
mov eax, dword [esi + 0x44]
mov edx, dword [esi + 0x48]
jmp 0x40a910
lea ecx, [edx + 0x445dae]
lea ebp, [edx + 0x446388]
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 0x40a9e1
mov ebp, dword [esp + 0xc]
add ebp, 3
and edx, dword [eax*4 + 0x446244]
shl edx, cl
or edx, ebx
mov dword [esi + 0x48], edx
add ecx, eax
mov dword [esi + 0x44], ecx
cmp ecx, 8
jb 0x40a7b0
mov ebx, dword [esp]
jmp 0x40a9b5
shr edx, 8
mov dword [esi + 0x48], edx
add ecx, 0xfffffff8
mov dword [esi + 0x44], ecx
cmp ecx, 7
jbe 0x40a7b3
mov eax, dword [esi + 0x30]
cmp eax, dword [esi + 0x34]
jae 0x40a9a0
lea ecx, [eax + 1]
mov dword [esi + 0x30], ecx
mov byte [eax], dl
mov ecx, dword [esi + 0x44]
mov edx, dword [esi + 0x48]
jmp 0x40a9a0
shr ebx, 8
mov dword [esi + 0x48], ebx
add ecx, 0xfffffff8
mov dword [esi + 0x44], ecx
cmp ecx, 7
jbe 0x40a978
mov ebp, dword [esi + 0x30]
cmp ebp, dword [esi + 0x34]
jae 0x40a9d0
lea ecx, [ebp + 1]
mov dword [esi + 0x30], ecx
mov byte [ebp], bl
mov ecx, dword [esi + 0x44]
mov ebx, dword [esi + 0x48]
jmp 0x40a9d0
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 0x40aa51
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 0x40aa1f
mov ecx, dword [esi + 0x30]
cmp ecx, dword [esi + 0x34]
jae 0x40aa40
lea edx, [ecx + 1]
mov dword [esi + 0x30], edx
mov byte [ecx], al
mov edi, dword [esi + 0x44]
mov eax, dword [esi + 0x48]
jmp 0x40aa40