Detect uninstall and downgrade in battery daily (#736)

Co-authored-by: DonnchaC <DonnchaC@users.noreply.github.com>

src/mvt/android/artifacts/dumpsys_battery_daily.py

@@ -14,12 +14,23 @@ class DumpsysBatteryDailyArtifact(AndroidArtifact):
     """
 
     def serialize(self, record: dict) -> Union[dict, list]:
+        action = record.get("action", "update")
+        package_name = record["package_name"]
+        vers = record["vers"]
+
+        if vers == "0":
+            data = f"Recorded uninstall of package {package_name} (vers 0)"
+        elif action == "downgrade":
+            prev_vers = record.get("previous_vers", "unknown")
+            data = f"Recorded downgrade of package {package_name} from vers {prev_vers} to vers {vers}"
+        else:
+            data = f"Recorded update of package {package_name} with vers {vers}"
+
         return {
             "timestamp": record["from"],
             "module": self.__class__.__name__,
             "event": "battery_daily",
-            "data": f"Recorded update of package {record['package_name']} "
+            "data": data,
-            f"with vers {record['vers']}",
         }
 
     def check_indicators(self) -> None:
@@ -36,6 +47,7 @@ class DumpsysBatteryDailyArtifact(AndroidArtifact):
     def parse(self, output: str) -> None:
         daily = None
         daily_updates = []
+        package_versions = {}  # Track package versions to detect downgrades
         for line in output.splitlines():
             if line.startswith("  Daily from "):
                 if len(daily_updates) > 0:
@@ -64,15 +76,44 @@ class DumpsysBatteryDailyArtifact(AndroidArtifact):
                     break
 
             if not already_seen:
-                daily_updates.append(
+                update_record = {
-                    {
+                    "action": "update",
-                        "action": "update",
+                    "from": daily["from"],
-                        "from": daily["from"],
+                    "to": daily["to"],
-                        "to": daily["to"],
+                    "package_name": package_name,
-                        "package_name": package_name,
+                    "vers": vers_nr,
-                        "vers": vers_nr,
+                }
-                    }
+
-                )
+                # Check for uninstall (version 0)
+                if vers_nr == "0":
+                    self.log.warning(
+                        "Detected uninstall of package %s (vers 0) on %s",
+                        package_name,
+                        daily["from"],
+                    )
+                # Check for downgrade
+                elif package_name in package_versions:
+                    try:
+                        current_vers = int(vers_nr)
+                        previous_vers = int(package_versions[package_name])
+                        if current_vers < previous_vers:
+                            update_record["action"] = "downgrade"
+                            update_record["previous_vers"] = str(previous_vers)
+                            self.log.warning(
+                                "Detected downgrade of package %s from vers %d to vers %d on %s",
+                                package_name,
+                                previous_vers,
+                                current_vers,
+                                daily["from"],
+                            )
+                    except ValueError:
+                        # If version numbers aren't integers, skip comparison
+                        pass
+
+                # Update tracking dictionary
+                package_versions[package_name] = vers_nr
+
+                daily_updates.append(update_record)
 
         if len(daily_updates) > 0:
             self.results.extend(daily_updates)

src/mvt/android/modules/bugreport/base.py

@@ -84,13 +84,17 @@ class BugReportModule(MVTModule):
                 return self._get_file_content(main_content.decode().strip())
             except KeyError:
                 return None
-        else:
-            dumpstate_logs = self._get_files_by_pattern("dumpState_*.log")
-            if not dumpstate_logs:
-                return None
 
+        dumpstate_logs = self._get_files_by_pattern("dumpState_*.log")
+        if dumpstate_logs:
             return self._get_file_content(dumpstate_logs[0])
 
+        dumpsys_files = self._get_files_by_pattern("*/dumpsys.txt")
+        if dumpsys_files:
+            return self._get_file_content(dumpsys_files[0])
+
+        return None
+
     def _get_file_modification_time(self, file_path: str) -> dict:
         if self.zip_archive:
             file_timetuple = self.zip_archive.getinfo(file_path).date_time

src/mvt/android/modules/bugreport/dumpsys_receivers.py

@@ -34,6 +34,20 @@ class DumpsysReceivers(DumpsysReceiversArtifact, BugReportModule):
 
         self.results = results if results else {}
 
+    def check_indicators(self) -> None:
+        for result in self.results:
+            if self.indicators:
+                receiver_name = self.results[result][0]["receiver"]
+
+                # return IoC if the stix2 process name a substring of the receiver name
+                ioc = self.indicators.check_receiver_prefix(receiver_name)
+                if ioc:
+                    self.results[result][0]["matched_indicator"] = ioc
+                    self.detected.append(result)
+                    continue
+
+
+
     def run(self) -> None:
         content = self._get_dumpstate_file()
         if not content:

src/mvt/common/indicators.py

@@ -768,6 +768,30 @@ class Indicators:
 
         return None
 
+
+    def check_receiver_prefix(self, receiver_name: str) -> Union[dict, None]:
+        """Check the provided receiver name against the list of indicators.
+        An IoC match is detected when a substring of the receiver matches the indicator
+        :param app_id: App ID to check against the list of indicators
+        :type app_id: str
+        :returns: Indicator details if matched, otherwise None
+
+        """
+        if not receiver_name:
+            return None
+
+        for ioc in self.get_iocs("app_ids"):
+            if ioc["value"].lower() in receiver_name.lower():
+                self.log.warning(
+                    'Found a known suspicious receiver with name "%s" '
+                    'matching indicators from "%s"',
+                    receiver_name,
+                    ioc["name"],
+                )
+                return ioc
+
+        return None
+
     def check_android_property_name(self, property_name: str) -> Optional[dict]:
         """Check the android property name against the list of indicators.
 

src/mvt/ios/data/ios_versions.json

@@ -631,6 +631,10 @@
         "build": "16H81",
         "version": "12.5.7"
     },
+    {
+        "version": "12.5.8",
+        "build": "16H88"
+    },
     {
         "build": "17A577",
         "version": "13.0"
@@ -899,6 +903,10 @@
         "version": "15.8.5",
         "build": "19H394"
     },
+    {
+        "version": "15.8.6",
+        "build": "19H402"
+    },
     {
         "build": "20A362",
         "version": "16.0"
@@ -1008,6 +1016,10 @@
         "version": "16.7.12",
         "build": "20H364"
     },
+    {
+        "version": "16.7.14",
+        "build": "20H370"
+    },
     {
         "version": "17.0",
         "build": "21A327"
@@ -1164,6 +1176,18 @@
         "version": "18.7.3",
         "build": "22H217"
     },
+    {
+        "version": "18.7.4",
+        "build": "22H218"
+    },
+    {
+        "version": "18.7.5",
+        "build": "22H311"
+    },
+    {
+        "version": "18.7.6",
+        "build": "22H320"
+    },
     {
         "version": "26",
         "build": "23A341"
@@ -1179,5 +1203,17 @@
     {
         "version": "26.2",
         "build": "23C55"
+    },
+    {
+        "version": "26.2.1",
+        "build": "23C71"
+    },
+    {
+        "version": "26.3",
+        "build": "23D127"
+    },
+    {
+        "version": "26.3.1",
+        "build": "23D8133"
     }
 ]