<s>
MP3Concept	B-Operating_System
is	O
the	O
first	O
trojan	O
horse	O
for	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
created	O
around	O
April	O
2004	O
.	O
</s>
<s>
MP3Concept	B-Operating_System
is	O
benign	O
,	O
it	O
was	O
designed	O
as	O
a	O
proof	O
of	O
concept	O
regarding	O
how	O
a	O
file	O
can	O
be	O
disguised	O
to	O
an	O
end	O
user	O
in	O
a	O
GUI	B-Application
environment	O
on	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
.	O
</s>
<s>
It	O
is	O
an	O
application	O
bundle	B-Application
that	O
looks	O
like	O
an	O
MP3	B-Application
file	I-Application
.	O
</s>
<s>
Since	O
its	O
creation	O
Apple	O
has	O
added	O
additional	O
verifications	O
to	O
the	O
Finder	B-Application
to	O
prevent	O
such	O
an	O
attack	O
.	O
</s>
<s>
Antivirus	B-Application
software	I-Application
also	O
now	O
looks	O
for	O
its	O
characteristics	O
as	O
well	O
.	O
</s>
