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DllToShellCode/ShellCode_Aplib/ShellCode_Aplib.c at master · luzhlon/DllToShellCode · GitHub
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ShellCode_Aplib
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ShellCode_Aplib.c
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ShellCode_Aplib.c
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// ShellCode_Aplib.cpp : 定义控制台应用程序的入口点。
//
#include
<stdio.h>
#include
<tchar.h>
#include
<stdint.h>
#ifndef
APLIB_ERROR
# define
APLIB_ERROR
((unsigned int) (-1))
#endif
// APLIB_ERROR
/* aplib v 1.1.1*/
/* internal data structure */
struct
APDSTATE
{
const
unsigned
char
*
source
;
unsigned
char
*
destination
;
unsigned
int
tag
;
unsigned
int
bitcount
;
};
#ifdef
__cplusplus
extern
"C"
{
#endif
// __cplusplus
unsigned
int
__cdecl
aplib_entry
(
const
void
*
source
,
unsigned
int
srclen
,
void
*
destination
,
unsigned
int
dstlen
);
unsigned
int
aplib_main
(
const
void
*
source
,
unsigned
int
srclen
,
void
*
destination
,
unsigned
int
dstlen
);
void
aplib_end
();
#ifdef
__cplusplus
}
#endif
// __cplusplus
#pragma
optimize("ts", on)
unsigned
int
__cdecl
aplib_entry
(
const
void
*
source
,
unsigned
int
srclen
,
void
*
destination
,
unsigned
int
dstlen
) {
return
aplib_main
(
source
,
srclen
,
destination
,
dstlen
);
}
static
unsigned
int
aP_getbit
(
struct
APDSTATE
*
ud
)
{
unsigned
int
bit
;
/* check if tag is empty */
if
(!
ud
->
bitcount
--
) {
/* load next tag */
ud
->
tag
=
*
ud
->
source
++
;
ud
->
bitcount
=
7
;
}
/* shift bit out of tag */
bit
=
(
ud
->
tag
>>
7
)
&
0x01
;
ud
->
tag
<<=
1
;
return
bit
;
}
static
unsigned
int
aP_getgamma
(
struct
APDSTATE
*
ud
)
{
unsigned
int
result
=
1
;
/* input gamma2-encoded bits */
do
{
result
=
(
result
<<
1
)
+
aP_getbit
(
ud
);
}
while
(
aP_getbit
(
ud
));
return
result
;
}
unsigned
int
aplib_main
(
const
void
*
source
,
unsigned
int
srclen
,
void
*
destination
,
unsigned
int
dstlen
) {
struct
APDSTATE
ud
;
unsigned
int
offs
,
len
,
R0
,
LWM
;
int
done
;
int
i
;
ud
.
source
=
(
const
unsigned
char
*
)
source
;
ud
.
destination
=
(
unsigned
char
*
)
destination
;
ud
.
bitcount
=
0
;
R0
=
(
unsigned
int
)
-1
;
LWM
=
0
;
done
=
0
;
/* first byte verbatim */
*
ud
.
destination
++
=
*
ud
.
source
++
;
/* main decompression loop */
while
(!
done
) {
if
(
aP_getbit
(
&
ud
)) {
if
(
aP_getbit
(
&
ud
)) {
if
(
aP_getbit
(
&
ud
)) {
offs
=
0
;
for
(
i
=
4
;
i
;
i
--
) {
offs
=
(
offs
<<
1
)
+
aP_getbit
(
&
ud
);
}
if
(
offs
) {
*
ud
.
destination
=
*
(
ud
.
destination
-
offs
);
ud
.
destination
++
;
}
else
{
*
ud
.
destination
++
=
0x00
;
}
LWM
=
0
;
}
else
{
offs
=
*
ud
.
source
++
;
len
=
2
+
(
offs
&
0x0001
);
offs
>>=
1
;
if
(
offs
) {
for
(;
len
;
len
--
) {
*
ud
.
destination
=
*
(
ud
.
destination
-
offs
);
ud
.
destination
++
;
}
}
else
{
done
=
1
;
}
R0
=
offs
;
LWM
=
1
;
}
}
else
{
offs
=
aP_getgamma
(
&
ud
);
if
((
LWM
==
0
)
&&
(
offs
==
2
)) {
offs
=
R0
;
len
=
aP_getgamma
(
&
ud
);
for
(;
len
;
len
--
) {
*
ud
.
destination
=
*
(
ud
.
destination
-
offs
);
ud
.
destination
++
;
}
}
else
{
if
(
LWM
==
0
) {
offs
-=
3
;
}
else
{
offs
-=
2
;
}
offs
<<=
8
;
offs
+=
*
ud
.
source
++
;
len
=
aP_getgamma
(
&
ud
);
if
(
offs
>=
32000
) {
len
++
;
}
if
(
offs
>=
1280
) {
len
++
;
}
if
(
offs
<
128
) {
len
+=
2
;
}
for
(;
len
;
len
--
) {
*
ud
.
destination
=
*
(
ud
.
destination
-
offs
);
ud
.
destination
++
;
}
R0
=
offs
;
}
LWM
=
1
;
}
}
else
{
*
ud
.
destination
++
=
*
ud
.
source
++
;
LWM
=
0
;
}
}
return
(
unsigned
int
)(
ud
.
destination
-
(
unsigned
char
*
)
destination
);
}
void
aplib_end
() {
}
#pragma
optimize("ts", off)
#ifdef
_WIN64
# define
OUT_FILE_NAME
"aplib_x64.bin"
#else
# define
OUT_FILE_NAME
"aplib_x86.bin"
#endif
int
_tmain
(
int
argc
,
_TCHAR
*
argv
[]) {
uint8_t
*
start
=
(
uint8_t
*
)
aplib_entry
;
uint8_t
*
end
=
(
uint8_t
*
)
aplib_end
;
size_t
size
=
end
-
start
;
printf
(
"[*] aplib shellcode start = %p, end = %p, size = %d\n"
,
start
,
end
,
size
);
FILE
*
file
=
0
;
fopen_s
(
&
file
,
OUT_FILE_NAME
,
"wb"
);
if
(
file
==
0
) {
printf
(
"[!] create out file error. file name = %s\n"
,
OUT_FILE_NAME
);
return
0
;
}
fwrite
(
start
,
1
,
size
,
file
);
fflush
(
file
);
fclose
(
file
);
printf
(
"[*] generate aplib shellcode sucess.\n"
);
return
0
;
}
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