<s>
Mumu	B-Application
is	O
a	O
computer	O
worm	O
that	O
was	O
isolated	O
in	O
June	O
2003	O
.	O
</s>
<s>
Mumu	B-Application
consists	O
of	O
a	O
mix	O
of	O
malicious	O
files	O
and	O
actual	O
utilities	O
.	O
</s>
<s>
Because	O
of	O
the	O
easily	O
customised	O
nature	O
of	O
this	O
worm	O
,	O
many	O
variants	O
have	O
been	O
discovered	O
,	O
but	O
most	O
are	O
generically	O
detected	O
under	O
the	O
Mumu.A	O
name	O
.	O
</s>
<s>
The	O
lone	O
exception	O
is	O
Mumu.B	O
,	O
which	O
is	O
detected	O
separately	O
by	O
most	O
antivirus	O
programs	O
.	O
</s>
<s>
The	O
"	O
standard	O
"	O
Mumu	B-Application
package	O
consists	O
of	O
the	O
following	O
:	O
</s>
<s>
Mumu	B-Application
spreads	O
by	O
scanning	O
IP	O
addresses	O
for	O
open	O
administrative	O
network	B-General_Concept
shares	I-General_Concept
.	O
</s>
<s>
Heavy	O
correlation	O
of	O
Mumu	B-Application
infections	O
with	O
infections	O
of	O
the	O
Valla	O
virus	O
have	O
been	O
observed	O
.	O
</s>
<s>
It	O
is	O
suspected	O
that	O
Mumu	B-Application
caused	O
a	O
resurgence	O
in	O
Valla	O
infections	O
after	O
Valla	O
infected	O
one	O
of	O
the	O
.exe	O
files	O
included	O
in	O
the	O
Mumu	B-Application
package	O
.	O
</s>
