Function at 0x4071c0
Capabilities:
Encrypt data using rc4 prga

Disassembly:
push ebp
push ebx
push edi
push esi
sub esp, 0xc
mov esi, ecx
test edx, edx
je 0x4071d5
push esi
call fcn.004074b0
jmp 0x4071db
push esi
call fcn.00407940
add esp, 4
lea edi, [esi + 0x9272]
cmp edi, dword [esi + 0x28]
jae 0x40743d
mov eax, 1
jmp 0x40720f
mov eax, dword [esp + 8]
shr eax, 1
cmp edi, dword [esi + 0x28]
jae 0x407443
cmp eax, 1
jne 0x40721d
movzx eax, byte [edi]
inc edi
or eax, 0x100
mov dword [esp + 8], eax
test al, 1
jne 0x407290
mov ebx, edi
movzx edi, byte [edi]
movzx edx, word [esi + edi*2 + 0x8852]
mov eax, dword [esi + 0x44]
mov ecx, eax
shl edx, cl
inc ebx
movzx ecx, byte [esi + edi + 0x8f12]
or edx, dword [esi + 0x48]
mov dword [esi + 0x48], edx
add ecx, eax
mov dword [esi + 0x44], ecx
mov edi, ebx
cmp ecx, 8
jae 0x407271
jmp 0x407200
shr edx, 8
mov dword [esi + 0x48], edx
add ecx, 0xfffffff8
mov dword [esi + 0x44], ecx
cmp ecx, 7
jbe 0x407200
mov eax, dword [esi + 0x30]
cmp eax, dword [esi + 0x34]
jae 0x407260
lea ecx, [eax + 1]
mov dword [esi + 0x30], ecx
mov byte [eax], dl
mov ecx, dword [esi + 0x44]
mov edx, dword [esi + 0x48]
jmp 0x407260
movzx eax, byte [edi]
movzx ebp, word [eax + eax + 0x439bea]
movzx edx, word [esi + ebp*2 + 0x8852]
mov ebx, dword [esi + 0x44]
mov ecx, ebx
shl edx, cl
movzx ecx, byte [esi + ebp + 0x8f12]
add ecx, ebx
movzx ebx, byte [edi + 1]
mov dword [esp + 4], ebx
or edx, dword [esi + 0x48]
movzx ebp, byte [edi + 2]
mov dword [esi + 0x48], edx
mov dword [esi + 0x44], ecx
cmp ecx, 8
jae 0x407321
movzx ebx, byte [eax + 0x439e44]
and eax, dword [ebx*4 + 0x439e00]
shl eax, cl
or eax, edx
mov dword [esi + 0x48], eax
add ecx, ebx
mov dword [esi + 0x44], ecx
cmp ecx, 8
jae 0x407351
mov edx, ebp
shl edx, 8
add edx, dword [esp + 4]
cmp edx, 0x200
mov dword [esp], edi
jb 0x407370
lea ebx, [ebp + 0x439b6a]
lea ebp, [ebp + 0x43a144]
jmp 0x40737c
shr edx, 8
mov dword [esi + 0x48], edx
add ecx, 0xfffffff8
mov dword [esi + 0x44], ecx
cmp ecx, 7
jbe 0x4072ce
mov ebx, dword [esi + 0x30]
cmp ebx, dword [esi + 0x34]
jae 0x407310
lea ecx, [ebx + 1]
mov dword [esi + 0x30], ecx
mov byte [ebx], dl
mov ecx, dword [esi + 0x44]
mov edx, dword [esi + 0x48]
jmp 0x407310
shr eax, 8
mov dword [esi + 0x48], eax
add ecx, 0xfffffff8
mov dword [esi + 0x44], ecx
cmp ecx, 7
jbe 0x4072ed
mov edx, dword [esi + 0x30]
cmp edx, dword [esi + 0x34]
jae 0x407340
lea ecx, [edx + 1]
mov dword [esi + 0x30], ecx
mov byte [edx], al
mov ecx, dword [esi + 0x44]
mov eax, dword [esi + 0x48]
jmp 0x407340
lea ebp, [edx + 0x439f44]
lea ebx, [edx + 0x43996a]
movzx edi, byte [ebx]
movzx ebx, word [esi + edi*2 + 0x8a92]
shl ebx, cl
or ebx, eax
movzx eax, byte [esi + edi + 0x9032]
add eax, ecx
movzx ebp, byte [ebp]
mov dword [esi + 0x48], ebx
mov dword [esi + 0x44], eax
cmp eax, 8
jb 0x4073e0
mov edi, dword [esp]
jmp 0x4073c1
shr ebx, 8
mov dword [esi + 0x48], ebx
add eax, 0xfffffff8
mov dword [esi + 0x44], eax
cmp eax, 7
jbe 0x4073e3
mov ecx, dword [esi + 0x30]
cmp ecx, dword [esi + 0x34]
jae 0x4073b0
lea eax, [ecx + 1]
mov dword [esi + 0x30], eax
mov byte [ecx], bl
mov eax, dword [esi + 0x44]
mov ebx, dword [esi + 0x48]
jmp 0x4073b0
mov edi, dword [esp]
add edi, 3
and edx, dword [ebp*4 + 0x439e00]
mov ecx, eax
shl edx, cl
or edx, ebx
mov dword [esi + 0x48], edx
mov ecx, eax
xor ecx, ebp
and eax, ebp
lea ecx, [ecx + eax*2]
mov dword [esi + 0x44], ecx
cmp ecx, 8
jae 0x407425
jmp 0x407200
shr edx, 8
mov dword [esi + 0x48], edx
add ecx, 0xfffffff8
mov dword [esi + 0x44], ecx
cmp ecx, 7
jbe 0x407200
mov eax, dword [esi + 0x30]
cmp eax, dword [esi + 0x34]
jae 0x407410
lea ecx, [eax + 1]
mov dword [esi + 0x30], ecx
mov byte [eax], dl
mov ecx, dword [esi + 0x44]
mov edx, dword [esi + 0x48]
jmp 0x407410
mov ecx, dword [esi + 0x44]
mov edx, dword [esi + 0x48]
movzx edi, byte [esi + 0x9012]
movzx eax, word [esi + 0x8a52]
shl eax, cl
or eax, edx
mov dword [esi + 0x48], eax
add edi, ecx
mov dword [esi + 0x44], edi
cmp edi, 8
jae 0x407491
mov ecx, dword [esi + 0x30]
xor eax, eax
cmp ecx, dword [esi + 0x34]
setb al
add esp, 0xc
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 0x407462
mov ecx, dword [esi + 0x30]
cmp ecx, dword [esi + 0x34]
jae 0x407480
lea edx, [ecx + 1]
mov dword [esi + 0x30], edx
mov byte [ecx], al
mov edi, dword [esi + 0x44]
mov eax, dword [esi + 0x48]
jmp 0x407480