Merge pull request #1787 from JakePeralta7/develop

Detect ETW Patching
2026-08-26 08:02:23 +02:00 · 2025-04-29 12:42:24 +01:00
parent 0c08b94547 19b094acf6
commit e22e82dcc2
1 changed files with 128 additions and 0 deletions
@@ -0,0 +1,128 @@
+# This file is Copyright 2025 Volatility Foundation and licensed under the Volatility Software License 1.0
+# which is available at https://www.volatilityfoundation.org/license/vsl-v1.0
+#
+import logging
+
+from volatility3.framework import exceptions, interfaces, renderers
+from volatility3.framework.configuration import requirements
+from volatility3.framework.objects import utility
+from volatility3.framework.renderers import format_hints
+from volatility3.plugins.windows import pslist, pe_symbols
+
+vollog = logging.getLogger(__name__)
+
+
+class EtwPatch(interfaces.plugins.PluginInterface):
+    """Identifies ETW (Event Tracing for Windows) patching techniques used by malware to evade detection.
+
+    This plugin examines the first opcode of key ETW functions in ntdll.dll and advapi32.dll
+    to detect common ETW bypass techniques such as return pointer manipulation (RET) or function
+    redirection (JMP). Attackers often patch these functions to prevent security tools from
+    receiving telemetry about process execution, API calls, and other system events.
+    """
+
+    _version = (1, 0, 0)
+    _required_framework_version = (2, 26, 0)
+
+    etw_functions = {
+        "ntdll.dll": {
+            pe_symbols.wanted_names_identifier: [
+                "EtwEventWrite",
+                "EtwEventWriteFull",
+                "NtTraceEvent",
+            ],
+        },
+        "advapi32.dll": {
+            pe_symbols.wanted_names_identifier: ["EventWrite"],
+        },
+    }
+
+    @classmethod
+    def get_requirements(cls):
+        return [
+            requirements.ModuleRequirement(
+                name="kernel",
+                description="Windows kernel",
+                architectures=["Intel32", "Intel64"],
+            ),
+            requirements.VersionRequirement(
+                name="pslist", component=pslist.PsList, version=(3, 0, 0)
+            ),
+            requirements.VersionRequirement(
+                name="pe_symbols", component=pe_symbols.PESymbols, version=(3, 0, 0)
+            ),
+            requirements.ListRequirement(
+                name="pid",
+                description="Filter on specific process IDs",
+                element_type=int,
+                optional=True,
+            ),
+        ]
+
+    def _generator(self):
+        # Get all ETW function addresses before looping through processes
+        found_symbols = pe_symbols.PESymbols.addresses_for_process_symbols(
+            context=self.context,
+            config_path=self.config_path,
+            kernel_module_name=self.config["kernel"],
+            symbols=self.etw_functions,
+        )
+
+        filter_func = pslist.PsList.create_pid_filter(self.config.get("pid", None))
+
+        for proc in pslist.PsList.list_processes(
+            context=self.context,
+            kernel_module_name=self.config["kernel"],
+            filter_func=filter_func,
+        ):
+
+            try:
+                proc_id = proc.UniqueProcessId
+                proc_name = utility.array_to_string(proc.ImageFileName)
+                proc_layer_name = proc.add_process_layer()
+            except exceptions.InvalidAddressException:
+                vollog.debug(f"Unable to create process layer for PID {proc_id}")
+                continue
+
+            # Map of opcodes to their instruction names
+            opcode_map = {
+                0xC3: "RET",
+                0xE9: "JMP",
+            }
+
+            for dll_name, functions in found_symbols.items():
+                for func_name, func_addr in functions:
+                    try:
+                        opcode = self.context.layers[proc_layer_name].read(
+                            func_addr, 1
+                        )[0]
+                        if opcode in opcode_map:
+                            instruction = opcode_map[opcode]
+                            yield (
+                                0,
+                                (
+                                    proc_id,
+                                    proc_name,
+                                    dll_name,
+                                    func_name,
+                                    format_hints.Hex(func_addr),
+                                    f"{opcode:02x} ({instruction})",
+                                ),
+                            )
+                    except exceptions.InvalidAddressException:
+                        vollog.debug(
+                            f"Invalid address when reading function {func_name} at {func_addr:#x} in process {proc_id}"
+                        )
+
+    def run(self):
+        return renderers.TreeGrid(
+            [
+                ("PID", int),
+                ("Process", str),
+                ("DLL", str),
+                ("Function", str),
+                ("Offset", format_hints.Hex),
+                ("Opcode", str),
+            ],
+            self._generator(),
+        )