<s>
Linux.Wifatch	B-Protocol
is	O
an	O
open-source	O
piece	O
of	O
malware	O
which	O
has	O
been	O
noted	O
for	O
not	O
having	O
been	O
used	O
for	O
malicious	O
actions	O
,	O
instead	O
attempting	O
to	O
secure	O
devices	O
from	O
other	O
malware	O
.	O
</s>
<s>
Linux.Wifatch	B-Protocol
operates	O
in	O
a	O
manner	O
similar	O
to	O
a	O
computer	B-Application
security	I-Application
system	I-Application
and	O
updates	O
definitions	O
through	O
its	O
Peer	O
to	O
Peer	O
network	O
and	O
deletes	O
remnants	O
of	O
malware	O
which	O
remain	O
.	O
</s>
<s>
Linux.Wifatch	B-Protocol
has	O
been	O
active	O
since	O
at	O
least	O
November	O
2014	O
.	O
</s>
<s>
According	O
to	O
its	O
authors	O
the	O
idea	O
for	O
Linux.Wifatch	B-Protocol
came	O
after	O
reading	O
the	O
Carna	O
paper	O
.	O
</s>
<s>
Linux.Wifatch	B-Protocol
was	O
later	O
released	O
on	O
GitLab	B-Application
by	O
its	O
authors	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
on	O
October	O
5	O
,	O
2015	O
.	O
</s>
<s>
Linux.Wifatch	B-Protocol
'	O
s	O
primary	O
mode	O
of	O
infection	O
is	O
by	O
logging	O
into	O
devices	O
using	O
weak	O
or	O
default	O
telnet	B-Protocol
credentials	O
.	O
</s>
<s>
Once	O
infected	O
,	O
Linux.Wifatch	B-Protocol
removes	O
other	O
malware	O
and	O
disables	O
telnet	B-Protocol
access	O
,	O
replacing	O
it	O
with	O
the	O
message	O
"	O
Telnet	B-Protocol
has	O
been	O
closed	O
to	O
avoid	O
further	O
infection	O
of	O
his	O
device	O
.	O
</s>
<s>
Please	O
disable	O
telnet	B-Protocol
,	O
change	O
telnet	B-Protocol
passwords	O
,	O
and/or	O
update	O
the	O
firmware.	O
"	O
</s>
