<s>
AFX	B-Application
Windows	I-Application
Rootkit	I-Application
2003	I-Application
is	O
a	O
user	B-Operating_System
mode	I-Operating_System
rootkit	O
that	O
hides	O
files	B-Operating_System
,	O
processes	B-Operating_System
and	O
registry	B-Protocol
.	O
</s>
<s>
When	O
the	O
installer	O
of	O
the	O
rootkit	O
is	O
executed	O
,	O
the	O
installer	O
creates	O
the	O
files	B-Operating_System
iexplore.dll	O
and	O
explorer.dll	O
in	O
the	O
system	O
directory	O
.	O
</s>
<s>
The	O
iexplore.dll	O
is	O
injected	O
into	O
explorer.exe	B-Protocol
,	O
and	O
the	O
explorer.dll	O
is	O
injected	O
into	O
all	O
running	O
processes	B-Operating_System
.	O
</s>
<s>
The	O
injected	O
DLLs	O
hooks	O
the	O
Windows	B-Library
API	I-Library
functions	O
to	O
hide	O
files	B-Operating_System
,	O
processes	B-Operating_System
and	O
registry	B-Protocol
.	O
</s>
