<s>
The	O
Silver	B-Application
Sparrow	I-Application
computer	O
virus	O
is	O
malware	O
that	O
runs	O
on	O
x86	B-Operating_System
-	O
and	O
Apple	O
M1-based	O
Macintosh	B-Device
computers	O
.	O
</s>
<s>
The	O
first	O
version	O
(	O
described	O
as	O
the	O
"	O
non-M1	O
"	O
version	O
)	O
is	O
compiled	O
for	O
Intel	B-Device
x86-64	I-Device
.	O
</s>
<s>
The	O
second	O
version	O
contains	O
code	B-Application
that	O
runs	O
natively	O
on	O
Apple	O
's	O
proprietary	O
M1	B-Device
processor	I-Device
,	O
and	O
was	O
probably	O
released	O
in	O
December	O
2020	O
and	O
discovered	O
in	O
February	O
2021	O
.	O
</s>
<s>
The	O
virus	O
connects	O
to	O
a	O
server	O
hosted	O
on	O
Amazon	B-Application
Web	I-Application
Services	I-Application
.	O
</s>
<s>
It	O
is	O
uncertain	O
whether	O
Silver	B-Application
Sparrow	I-Application
is	O
embedded	O
inside	O
malicious	O
advertisements	O
,	O
pirated	O
software	O
,	O
or	O
bogus	O
Adobe	B-Operating_System
Flash	I-Operating_System
Player	I-Operating_System
updaters	O
.	O
</s>
<s>
Red	O
Canary	O
has	O
theorized	O
that	O
systems	O
could	O
have	O
been	O
infected	O
through	O
malicious	O
search	O
engine	O
results	O
that	O
might	O
have	O
directed	O
them	O
to	O
download	O
the	O
code	B-Application
.	O
</s>
<s>
Silver	B-Application
Sparrow	I-Application
is	O
the	O
second	O
malware	O
virus	O
observed	O
to	O
include	O
M1-native	O
code	B-Application
.	O
</s>
<s>
As	O
of	O
23	O
February	O
2021	O
,	O
Internet	O
security	O
company	O
Malwarebytes	B-Language
has	O
discovered	O
over	O
29,000	O
Macs	O
worldwide	O
running	O
their	O
anti-malware	O
software	O
to	O
be	O
infected	O
with	O
Silver	B-Application
Sparrow	I-Application
.	O
</s>
<s>
Silver	B-Application
Sparrow	I-Application
infected	O
Macs	O
have	O
been	O
found	O
in	O
153	O
countries	O
as	O
of	O
February	O
17	O
,	O
with	O
higher	O
concentrations	O
reported	O
in	O
the	O
US	O
,	O
UK	O
,	O
Canada	O
,	O
France	O
,	O
and	O
Germany	O
,	O
according	O
to	O
data	O
from	O
Malwarebytes	B-Language
.	O
</s>
