Completed linux_check_modules. Added kobject extension as needed for check_module plugin

2026-08-29 19:29:42 +02:00 · 2020-07-21 23:00:52 +01:00
parent ef97c672e3
commit 82a6b23669
3 changed files with 522 additions and 422 deletions
@@ -0,0 +1,87 @@
+# Volatility
+
+# This file is Copyright 2020 Volatility Foundation and licensed under the Volatility Software License 1.0
+# which is available at https://www.volatilityfoundation.org/license/vsl-v1.0
+#
+
+"""
+@author:       Matt Tressler
+@contact:      matthewtressler10@gmail.com
+"""
+
+import logging
+from typing import List
+
+from volatility.framework import interfaces, renderers, exceptions, constants, contexts
+from volatility.framework.automagic import linux
+from volatility.framework.configuration import requirements
+from volatility.framework.interfaces import plugins
+from volatility.framework.layers import intel
+from volatility.framework.objects import utility
+from volatility.plugins.linux import lsmod
+from volatility.framework.renderers import format_hints
+
+vollog = logging.getLogger(__name__)
+
+
+class check_modules(plugins.PluginInterface):
+    """Compares module list to sysfs info, if available"""
+
+    @classmethod
+    def get_requirements(cls) -> List[interfaces.configuration.RequirementInterface]:
+        return [
+            requirements.TranslationLayerRequirement(name='primary',
+                                                     description='Memory layer for the kernel',
+                                                     architectures=["Intel32", "Intel64"]),
+            requirements.SymbolTableRequirement(
+                name="vmlinux", description="Linux kernel symbols"),
+
+            requirements.PluginRequirement(
+                name='lsmod', plugin=lsmod.Lsmod, version=(1, 0, 0))
+        ]
+
+    def get_kset_modules(self, vmlinux):
+
+        try:
+            module_kset = vmlinux.object_from_symbol("module_kset")
+        except exceptions.SymbolError:
+            vollog.error("this command is not supported by this profile")
+            return
+
+        if not module_kset:
+            vollog.error("this command is not supported by this profile")
+
+        ret = {}
+
+        kobj_off = self.context.symbol_space.get_type(
+            self.config['vmlinux'] + constants.BANG + 'module_kobject').relative_child_offset('kobj')
+
+        for kobj in module_kset.list.to_list(vmlinux.name + constants.BANG + "kobject", "entry"):
+
+            mod_kobj = vmlinux.object(
+                object_type="module_kobject", offset=kobj.vol.offset - kobj_off)
+
+            mod = mod_kobj.mod
+
+            name = utility.pointer_to_string(kobj.name, 32)
+            if kobj.name and kobj.reference_count() > 2:
+                ret[name] = mod
+
+        return ret
+
+    def _generator(self):
+        vmlinux = contexts.Module(
+            self.context, self.config['vmlinux'], self.config['primary'], 0)
+
+        kset_modules = self.get_kset_modules(vmlinux)
+
+        lsmod_modules = set(str(utility.array_to_string(modules.name)) for modules in
+                            lsmod.Lsmod.list_modules(self.context,
+                                                     self.config['primary'], self.config['vmlinux']))
+
+        for mod_name in set(kset_modules.keys()).difference(lsmod_modules):
+            yield(0, (format_hints.Hex(kset_modules[mod_name]), str(mod_name)))
+
+    def run(self):
+        return renderers.TreeGrid([("Module Address", format_hints.Hex),
+                                   ("Module Name", str)], self._generator())