Function at 0x402580
Capabilities:
Encrypt data using rc4 prga

Disassembly:
push ebp
push ebx
push edi
push esi
sub esp, 0x18
mov ebp, dword [ecx]
xor eax, eax
cmp byte [ebp], 0x22
jne 0x402834
mov esi, ebp
jmp 0x4025af
lea esi, [ebx + 2]
mov dword [ecx], esi
cmp byte [ebx + 2], 0
je 0x402834
mov ebx, esi
inc esi
mov dword [ecx], esi
movzx edi, byte [ebx + 1]
cmp edi, 0x5c
je 0x4025a0
test edi, edi
je 0x402834
cmp edi, 0x22
jne 0x4025af
mov dword [esp + 8], edx
add ebx, 2
mov dword [ecx], ebx
mov edi, ebp
sub ebx, ebp
lea eax, [ebx - 1]
push eax
call dword [0x43d004]
add esp, 4
mov dword [esp], eax
test eax, eax
je case.0x402637.35
mov esi, dword [esp]
add ebx, 0xfffffffe
je 0x4027ea
movzx eax, byte [edi + 1]
mov esi, dword [esp]
test al, al
je 0x4027ea
mov ebp, edi
inc ebp
mov esi, dword [esp]
mov dword [esp + 0xc], ebp
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
cmp al, 0x5c
jne 0x402650
movzx eax, byte [ebp + 1]
add eax, 0xffffffde
cmp eax, 0x53
ja case.0x402637.35
lea edi, [ebp + 1]
jmp dword [eax*4 + 0x43a6bc]
mov byte [esi], 0x22
jmp 0x40265c
cmp al, 0x20
jb case.0x402637.35
mov byte [esi], al
mov edi, ebp
inc esi
movzx eax, byte [edi + 1]
test al, al
mov edx, dword [esp + 0xc]
je 0x4027ea
inc edi
mov ecx, edi
sub ecx, edx
mov ebp, edi
cmp ecx, ebx
jb 0x402620
jmp 0x4027ea
mov byte [esi], 0xa
jmp 0x40265c
mov byte [esi], 0x2f
jmp 0x40265c
mov byte [esi], 8
jmp 0x40265c
lea ecx, [ebp + 2]
lea edx, [esp + 0x14]
call fcn.00402840
test eax, eax
jne case.0x402637.35
mov ecx, dword [esp + 0x14]
cmp ecx, 0x7f
ja 0x4026c1
mov byte [esi], cl
jmp 0x40270e
mov byte [esi], 0x5c
jmp 0x40265c
mov byte [esi], 0xd
jmp 0x40265c
mov byte [esi], 0xc
jmp 0x40265c
mov byte [esi], 9
jmp 0x40265c
cmp ecx, 0x7ff
ja 0x4026de
mov eax, ecx
shr eax, 6
or al, 0xc0
mov byte [esi], al
and cl, 0x3f
or cl, 0x80
mov byte [esi + 1], cl
inc esi
jmp 0x40270e
lea eax, [ecx - 0xe000]
cmp eax, 0xfffff7ff
ja 0x40271d
mov eax, ecx
shr eax, 0xc
and al, 0xf
or al, 0xe0
mov byte [esi], al
mov eax, ecx
shr eax, 6
and al, 0x3f
or al, 0x80
mov byte [esi + 1], al
and cl, 0x3f
or cl, 0x80
mov byte [esi + 2], cl
add esi, 2
mov eax, 1
add edi, eax
add edi, 3
jmp 0x40265c
cmp ecx, 0xdbff
ja case.0x402637.35
cmp byte [ebp + 6], 0x5c
jne case.0x402637.35
cmp byte [ebp + 7], 0x75
jne case.0x402637.35
add ebp, 8
mov dword [esp + 4], ecx
mov ecx, ebp
lea edx, [esp + 0x10]
call fcn.00402840
mov ecx, dword [esp + 4]
test eax, eax
jne case.0x402637.35
mov eax, dword [esp + 0x10]
cmp eax, 0xdc00
jb case.0x402637.35
cmp eax, 0xdfff
ja case.0x402637.35
and ecx, 0x7ff
lea edx, [ecx + ecx]
sub edx, ecx
mov ecx, edx
xor ecx, 0x3ffc00
or edx, 0x3ff
and edx, ecx
shl edx, 0xa
mov ebp, eax
and ebp, 0x3ff
lea ecx, [edx + ebp]
mov dword [esp + 4], eax
lea eax, [edx + ebp]
add eax, 0x10000
mov edx, eax
shr edx, 0x12
and dl, 7
or dl, 0xf0
mov byte [esi], dl
shr eax, 0xc
and al, 0x3f
or al, 0x80
mov byte [esi + 1], al
shr ecx, 6
and cl, 0x3f
or cl, 0x80
mov byte [esi + 2], cl
mov eax, dword [esp + 4]
and al, 0x3f
or al, 0x80
mov byte [esi + 3], al
add esi, 3
mov eax, 7
add edi, eax
add edi, 3
jmp 0x40265c
mov byte [esi], 0
sub esi, dword [esp]
lea edi, [esi + 1]
push edi
call dword [0x43d004]
add esp, 4
test eax, eax
je case.0x402637.35
push edi
mov ebx, dword [esp + 4]
push ebx
push eax
mov edi, eax
call fcn.00408360
add esp, 0xc
mov eax, dword [esp + 8]
mov dword [eax], esi
push ebx
call dword [section..data]
add esp, 4
mov eax, edi
jmp 0x402834
push dword [esp]
call dword [section..data]
add esp, 4
xor eax, eax
add esp, 0x18
pop esi
pop edi
pop ebx
pop ebp
ret