creating tamper scripts for the XSS payloads

lib/attacks/tamper_scripts/base64_encode.py

@@ -0,0 +1,5 @@
+import base64
+
+
+def tamper(payload, **kwargs):
+    return base64.b64encode(payload)

lib/attacks/tamper_scripts/hex_encode.py

@@ -0,0 +1,6 @@
+def tamper(payload, **kwargs):
+    retval = hex(hash(payload))
+    if "-" in str(retval):
+        return retval[1:-1]
+    else:
+        return retval

lib/attacks/tamper_scripts/unicode_encode.py

@@ -0,0 +1,8 @@
+def tamper(payload, **kwargs):
+    i = 0
+    retval = ""
+
+    while i < len(payload):
+        retval += "%u{}".format(ord(payload[i]))
+        i += 1
+    return retval

lib/attacks/xss_scan/__init__.py

@@ -5,6 +5,12 @@ import tempfile
 
 import requests
 
+from lib.errors import InvalidTamperProvided
+from lib.attacks.tamper_scripts import (
+    unicode_encode,
+    base64_encode,
+    hex_encode
+)
 from lib.settings import (
     logger,
     set_color,
@@ -15,16 +21,46 @@ from lib.settings import (
 )
 
 
+def list_tamper_scripts(path="{}/lib/attacks/tamper_scripts"):
+    retval = set()
+    exclude = ["__init__.py", ".pyc"]
+    for item in os.listdir(path.format(os.getcwd())):
+        if not any(f in item for f in exclude):
+            item = item.split(".")[0]
+            item = item.split("_")[0]
+            retval.add(item)
+    return retval
+
+
+def __tamper_payload(payload, tamper_type):
+    acceptable = list_tamper_scripts()
+    if tamper_type in acceptable:
+        if tamper_type == "unicode":
+            return unicode_encode.tamper(payload)
+        elif tamper_type == "hex":
+            return hex_encode.tamper(payload)
+        else:
+            return base64_encode.tamper(payload)
+    else:
+        raise InvalidTamperProvided(
+            "sent tamper type '{}' is not a valid type, acceptable are {}...".format(
+                tamper_type, ", ".join(list(acceptable))
+            )
+        )
+
+
 def __load_payloads(filename="{}/etc/xss_payloads.txt"):
     with open(filename.format(os.getcwd())) as payloads: return payloads.readlines()
 
 
-def create_urls(url, payload_list):
+def create_urls(url, payload_list, tamper=None):
     tf = tempfile.NamedTemporaryFile(delete=False)
     tf_name = tf.name
     with tf as tmp:
         for payload in payload_list:
-            loaded_url = "{}{}".format(url, payload)
+            if tamper:
+                payload = __tamper_payload(payload, tamper_type=tamper)
+            loaded_url = "{}{}\n".format(url, payload)
             tmp.write(loaded_url)
     return tf_name
 
@@ -53,7 +89,11 @@ def scan_xss(url, agent=None, proxy=None):
     return False, None
 
 
-def main_xss(start_url, verbose=False, proxy=None, agent=None):
+def main_xss(start_url, verbose=False, proxy=None, agent=None, tamper=None):
+    if tamper:
+        logger.info(set_color(
+            "tampering payloads with '{}'...".format(tamper)
+        ))
     find_xss_script(start_url)
     logger.info(set_color(
         "loading payloads..."
@@ -66,7 +106,7 @@ def main_xss(start_url, verbose=False, proxy=None, agent=None):
     logger.info(set_color(
         "payloads will be written to a temporary file and read from there..."
     ))
-    filename = create_urls(start_url, payloads)
+    filename = create_urls(start_url, payloads, tamper=tamper)
     logger.info(set_color(
             "loaded URL's have been saved to '{}'...".format(filename)
         ))

lib/errors.py

@@ -13,4 +13,7 @@ class SqlmapFailedStart(Exception): pass
 class SpiderTestFailure(Exception): pass
 
 
-class InvalidInputProvided(Exception): pass
+class InvalidInputProvided(Exception): pass
+
+
+class InvalidTamperProvided(Exception): pass

zeus.py

@@ -94,6 +94,8 @@ if __name__ == "__main__":
                        help="Show the arguments that nmap understands")
     attacks.add_option("-P", "--show-possibles", dest="showAllConnections", action="store_true",
                        help="Show all connections made during the admin panel search")
+    attacks.add_option("--tamper", dest="tamperXssPayloads", metavar="TAMPER-SCRIPT",
+                       help="Send the XSS payloads through tampering before sending to the target")
 
     # search engine options
     engines = optparse.OptionGroup(parser, "Search engine arguments",
@@ -371,7 +373,7 @@ if __name__ == "__main__":
             elif admin:
                 main(url, show=opt.showAllConnections, verbose=verbose)
             elif xss:
-                main_xss(url, verbose=verbose, proxy=proxy_to_use, agent=agent_to_use)
+                main_xss(url, verbose=verbose, proxy=proxy_to_use, agent=agent_to_use, tamper=opt.tamperXssPayloads)
             else:
                 pass
         else: