<s>
Hupigon	B-Language
(	O
also	O
Graftor	B-Language
)	O
detected	O
as	O
(	O
Backdoor.Win32.Hupigon	O
,	O
Trojan.Win32.Hupigon	O
,	O
Backdoor.Win32.Graftor	B-Language
,	O
and	O
Trojan.Win32.Graftor	O
)	O
is	O
a	O
backdoor	O
Trojan	O
.	O
</s>
<s>
This	O
malicious	O
software	O
,	O
which	O
usually	O
should	O
be	O
a	O
portable	O
executable	O
(	O
and	O
may	O
be	O
packed	O
with	O
UPX	B-Language
)	O
,	O
is	O
mostly	O
used	O
in	O
order	O
to	O
connect	O
a	O
(	O
worldwide	O
)	O
group	O
of	O
victimized	O
PCs	O
and	O
form	O
a	O
botnet	B-Architecture
(	O
also	O
known	O
as	O
a	O
zombie	B-Architecture
network	I-Architecture
)	O
.	O
</s>
<s>
In	O
the	O
Hupigon	B-Language
family	O
,	O
there	O
are	O
a	O
large	O
number	O
of	O
variants	O
.	O
</s>
<s>
They	O
are	O
written	O
in	O
Borland	B-Language
Delphi	I-Language
.	O
</s>
