bypass dnslog.cn filter.

Author: whwlsfb

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>cn.wanghw</groupId>
     <artifactId>Log4j2Scan</artifactId>
-    <version>0.8-SNAPSHOT</version>
+    <version>0.8.1-SNAPSHOT</version>
 
     <build>
         <plugins>

src/main/java/burp/BurpExtender.java

@@ -13,7 +13,7 @@ public class BurpExtender implements IBurpExtender, ITab {
     public IBurpExtenderCallbacks callbacks;
     public PrintWriter stdout;
     public PrintWriter stderr;
-    public String version = "0.8";
+    public String version = "0.8.1";
     public Log4j2ScanUIHandler uiHandler;
     public Log4j2Scanner scanner;
 

src/main/java/burp/backend/platform/DnslogCN.java

@@ -13,19 +13,19 @@
 
 public class DnslogCN implements IBackend {
     OkHttpClient client = new OkHttpClient().newBuilder().cookieJar(new CookieJar() {
-        private final HashMap<String, List<Cookie>> cookieStore = new HashMap<>();
-
-        @Override
-        public void saveFromResponse(HttpUrl url, List<Cookie> cookies) {
-            cookieStore.put(url.host(), cookies);
-        }
-
-        @Override
-        public List<Cookie> loadForRequest(HttpUrl url) {
-            List<Cookie> cookies = cookieStore.get(url.host());
-            return cookies != null ? cookies : new ArrayList<Cookie>();
-        }
-    }).connectTimeout(50, TimeUnit.SECONDS).
+                private final HashMap<String, List<Cookie>> cookieStore = new HashMap<>();
+
+                @Override
+                public void saveFromResponse(HttpUrl url, List<Cookie> cookies) {
+                    cookieStore.put(url.host(), cookies);
+                }
+
+                @Override
+                public List<Cookie> loadForRequest(HttpUrl url) {
+                    List<Cookie> cookies = cookieStore.get(url.host());
+                    return cookies != null ? cookies : new ArrayList<Cookie>();
+                }
+            }).connectTimeout(50, TimeUnit.SECONDS).
             callTimeout(50, TimeUnit.SECONDS).
             readTimeout(3, TimeUnit.MINUTES).build();
     String platformUrl = "http://www.dnslog.cn/";
@@ -40,7 +40,7 @@ public DnslogCN() {
     private void initDomain() {
         try {
             Utils.Callback.printOutput("get domain...");
-            Response resp = client.newCall(GetDefaultRequest(platformUrl + "/getdomain.php").build()).execute();
+            Response resp = client.newCall(GetDefaultRequest(platformUrl + "/getdomain.php?t=0." + Math.abs(Utils.getRandomLong())).build()).execute();
             rootDomain = resp.body().string();
             Utils.Callback.printOutput(String.format("Domain: %s", rootDomain));
             startSessionHeartbeat();
@@ -75,7 +75,7 @@ public String getNewPayload() {
 
     public boolean flushCache() {
         try {
-            Response resp = client.newCall(HttpUtils.GetDefaultRequest(platformUrl + "getrecords.php").build()).execute();
+            Response resp = client.newCall(HttpUtils.GetDefaultRequest(platformUrl + "getrecords.php?t=0." + Math.abs(Utils.getRandomLong())).build()).execute();
             dnsLogResultCache = resp.body().string().toLowerCase();
             Utils.Callback.printOutput(String.format("Got Dnslog Result OK!: %s", dnsLogResultCache));
             return true;

src/main/java/burp/utils/Utils.java

@@ -16,6 +16,10 @@ public class Utils {
     private static MessageDigest md;
     private static Random rand = new Random();
 
+    public static long getRandomLong() {
+        return rand.nextLong();
+    }
+
     public static int GetRandomNumber(int min, int max) {
         return rand.nextInt(max - min + 1) + min;
     }