Function at 0x43f840
Capabilities:
Encrypt data using rc4 prga

Disassembly:
push ebp
push ebx
push edi
push esi
sub esp, 0x1c
mov ebx, dword [esp + 0x30]
mov esi, dword [esp + 0x34]
mov eax, dword [esp + 0x38]
add eax, esi
sub eax, dword [esp + 0x40]
mov dword [ebx + 8], 0
mov dword [ebx + 4], 0
mov dword [ebx], 0
mov dword [esp + 0x18], eax
cmp eax, esi
jbe 0x43fad3
mov edx, dword [esp + 0x44]
mov eax, dword [esp + 0x40]
lea ebp, [eax - 1]
mov dword [esp + 4], 0
mov dword [esp + 8], 0
mov dword [esp + 0x10], 0
jmp 0x43f8d9
mov edi, dword [esp + 4]
mov ecx, edi
mov eax, dword [esp + 8]
sub ecx, eax
cmp edi, dword [esp + 0x10]
je 0x43f929
mov edi, dword [esp + 4]
mov ebx, dword [esp + 0x30]
mov dword [eax + ecx], esi
add edi, 4
mov dword [esp + 4], edi
mov dword [ebx + 4], edi
mov eax, dword [esp + 0x40]
add esi, eax
dec esi
inc esi
cmp esi, dword [esp + 0x18]
jae 0x43fad3
test edx, edx
je 0x43f8e2
cmp byte [edx], 0x3f
je 0x43f8ed
movzx ecx, byte [esi]
mov eax, dword [esp + 0x3c]
cmp cl, byte [eax]
jne 0x43f8ce
cmp dword [esp + 0x40], 2
jb 0x43f8a0
xor ecx, ecx
jmp 0x43f91c
movzx edx, byte [esi + ecx + 1]
mov eax, dword [esp + 0x3c]
cmp dl, byte [eax + ecx + 1]
mov edx, dword [esp + 0x44]
jne 0x43fa1f
inc ecx
cmp ebp, ecx
je 0x43f8a0
test edx, edx
je 0x43f900
cmp byte [edx + ecx + 1], 0x3f
jne 0x43f900
jmp 0x43f917
mov dword [esp], ecx
sar ecx, 2
lea eax, [ecx + 1]
mov edi, ecx
shr edi, 1
add edi, ecx
cmp edi, eax
ja 0x43f93e
mov edi, eax
lea eax, [edi*4]
push eax
call fcn.0040c990
add esp, 4
mov edx, dword [esp + 8]
test edx, edx
mov dword [esp + 0xc], eax
je 0x43faa7
mov dword [esp + 0x10], edi
cmp eax, edx
mov ecx, dword [esp]
mov ebx, eax
mov eax, dword [esp + 4]
jbe 0x43fa26
cmp eax, ebx
jbe 0x43fa26
test ecx, ecx
je 0x43fa93
mov eax, dword [esp + 8]
mov edx, dword [esp]
add eax, edx
dec eax
mov ecx, dword [esp + 0xc]
add ecx, edx
dec ecx
mov edi, edx
and edi, 7
je 0x43f9b3
neg edi
xor edx, edx
nop
movzx ebx, byte [eax + edx]
mov byte [ecx + edx], bl
dec edx
cmp edi, edx
jne 0x43f9a0
add eax, edx
add ecx, edx
add edx, dword [esp]
mov edi, dword [esp + 8]
sub edi, dword [esp + 4]
cmp edi, 0xfffffff8
ja 0x43fa93
neg edx
xor edi, edi
nop
nop
nop
nop
nop
nop
nop
nop
movzx ebx, byte [eax + edi]
mov byte [ecx + edi], bl
movzx ebx, byte [eax + edi - 1]
mov byte [ecx + edi - 1], bl
movzx ebx, byte [eax + edi - 2]
mov byte [ecx + edi - 2], bl
movzx ebx, byte [eax + edi - 3]
mov byte [ecx + edi - 3], bl
movzx ebx, byte [eax + edi - 4]
mov byte [ecx + edi - 4], bl
movzx ebx, byte [eax + edi - 5]
mov byte [ecx + edi - 5], bl
movzx ebx, byte [eax + edi - 6]
mov byte [ecx + edi - 6], bl
movzx ebx, byte [eax + edi - 7]
mov byte [ecx + edi - 7], bl
add edi, 0xfffffff8
cmp edx, edi
jne 0x43f9d0
jmp 0x43fa93
add esi, ecx
jmp 0x43f8ce
shr ecx, 2
mov eax, edx
mov edi, ebx
xchg esi, eax
rep movsd dword es:[edi], dword [esi]
xchg esi, eax
mov eax, edx
mov ecx, dword [esp]
mov edx, ecx
and edx, 0xfffffffc
lea edi, [ebx + edx]
mov dword [esp + 0x14], edi
add edx, eax
mov eax, ecx
and eax, 3
mov ecx, eax
shr ecx, 1
mov dword [esp + 4], edx
mov ebx, dword [esp + 4]
xchg esi, ebx
rep movsw word es:[edi], word [esi]
xchg esi, ebx
mov ecx, dword [esp]
mov ebx, dword [esp + 0x14]
xor ecx, 2
and ecx, eax
je 0x43fa93
mov edi, dword [esp]
and edi, 2
movzx eax, byte [edx + edi]
mov byte [ebx + edi], al
cmp ecx, 1
je 0x43fa93
movzx eax, byte [edx + edi + 1]
mov byte [ebx + edi + 1], al
cmp ecx, 2
je 0x43fa93
movzx eax, byte [edx + edi + 2]
mov byte [ebx + edi + 2], al
push dword [esp + 8]
call fcn.0040c9a0
add esp, 4
mov edi, dword [esp + 0x10]
mov eax, dword [esp + 0xc]
mov ebx, dword [esp + 0x30]
mov dword [ebx], eax
lea edx, [eax + edi*4]
mov edi, eax
mov ecx, dword [esp]
add edi, ecx
mov dword [esp + 0x10], edx
mov dword [ebx + 8], edx
mov eax, dword [esp + 0xc]
mov dword [esp + 8], eax
mov eax, dword [esp + 0xc]
mov edx, dword [esp + 0x44]
jmp 0x43f8ba
mov eax, ebx
add esp, 0x1c
pop esi
pop edi
pop ebx
pop ebp
ret