<s>
Backdoor.Win32.IRCBot	B-Application
(	O
also	O
known	O
as	O
W32/Checkout	O
(	O
McAfee	O
)	O
,	O
W32.Mubla	O
(	O
Symantec	O
)	O
,	O
W32/IRCBot	O
-WB	O
(	O
Sophos	O
)	O
,	O
and	O
Backdoor.Win32.IRCBot.aaq	O
(	O
Bydoon	O
Center	O
)	O
)	O
is	O
a	O
backdoor	O
computer	O
worm	O
that	O
is	O
spread	O
through	O
MSN	B-Protocol
Messenger	I-Protocol
and	O
Windows	B-Protocol
Live	I-Protocol
Messenger	I-Protocol
.	O
</s>
<s>
Once	O
installed	B-Application
on	O
a	O
PC	B-Device
,	O
the	O
worm	O
copies	O
itself	O
into	O
a	O
Windows	O
system	B-Operating_System
folder	I-Operating_System
,	O
creates	O
a	O
new	O
file	O
displayed	O
as	O
"	O
Windows	O
Genuine	O
Advantage	O
Validation	O
Notification	O
"	O
and	O
becomes	O
part	O
of	O
the	O
computer	O
's	O
automatic	O
startup	B-Operating_System
.	O
</s>
<s>
In	O
addition	O
,	O
it	O
attempts	O
to	O
send	O
itself	O
to	O
all	O
MSN	B-Protocol
contacts	O
by	O
offering	O
an	O
attachment	O
named	O
'	O
photos.zip	O
'	O
.	O
</s>
<s>
Executing	O
this	O
file	O
will	O
install	O
the	O
worm	O
onto	O
the	O
local	O
PC	B-Device
.	O
</s>
<s>
The	O
Win32.IRCBot	O
worm	O
provides	O
a	O
backdoor	O
server	B-Application
and	O
allows	O
a	O
remote	O
intruder	O
to	O
gain	O
access	O
and	O
control	O
over	O
the	O
computer	O
via	O
an	O
Internet	B-Protocol
Relay	I-Protocol
Chat	I-Protocol
channel	O
.	O
</s>
<s>
For	O
example	O
,	O
Sophos	O
lists	O
Backdoor.Win32.IRCBot.ul	O
,	O
W32/Poebot	O
-JT	O
worm	O
,	O
and	O
Win32/IRCBot.TS	O
as	O
aliases	O
of	O
the	O
W32/Gaobot.worm.gen.e	O
worm	O
,	O
a	O
member	O
of	O
the	O
Agobot	O
family	O
.	O
</s>
