<s>
Citadel	B-Application
is	O
a	O
piece	O
of	O
massively-distributed	O
malware	O
based	O
upon	O
Zeus	O
.	O
</s>
<s>
It	O
targets	O
credentials	O
stored	O
in	O
password	O
managers	O
such	O
as	O
Keepass	B-Language
,	O
Password	B-Language
Safe	I-Language
and	O
neXus	O
Personal	O
Security	O
Client	O
.	O
</s>
<s>
By	O
2017	O
(	O
it	O
was	O
first	O
identified	O
in	O
2011	O
)	O
Citadel	B-Application
had	O
infected	O
about	O
11	O
million	O
computers	O
worldwide	O
and	O
had	O
caused	O
over	O
$500	O
million	O
in	O
losses	O
.	O
</s>
<s>
On	O
March	O
20	O
,	O
2017	O
,	O
having	O
been	O
extradited	O
from	O
Norway	O
to	O
the	O
United	O
States	O
,	O
a	O
Russian	O
computer	O
science	O
professional	O
Mark	O
Vartanyan	O
pleaded	O
guilty	O
to	O
a	O
computer	O
fraud	O
charge	O
for	O
his	O
part	O
in	O
developing	O
the	O
Control	O
Panel	O
for	O
Citadel	B-Application
.	O
</s>
