mirror of https://github.com/mvt-project/mvt.git
Obtaining permissions for installed packages
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Nex
parent
1b335fda1d
commit
52a204cab6
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@ -15,6 +15,29 @@ from .base import AndroidExtraction
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log = logging.getLogger(__name__)
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DANGEROUS_PERMISSIONS_THRESHOLD = 10
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DANGEROUS_PERMISSIONS = [
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"android.permission.ACCESS_COARSE_LOCATION",
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"android.permission.ACCESS_FINE_LOCATION",
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"android.permission.AUTHENTICATE_ACCOUNTS",
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"android.permission.CAMERA",
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"android.permission.DISABLE_KEYGUARD",
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"android.permission.PROCESS_OUTGOING_CALLS",
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"android.permission.READ_CALENDAR",
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"android.permission.READ_CALL_LOG",
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"android.permission.READ_CONTACTS",
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"android.permission.READ_PHONE_STATE",
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"android.permission.READ_SMS",
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"android.permission.RECEIVE_MMS",
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"android.permission.RECEIVE_SMS",
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"android.permission.RECEIVE_WAP_PUSH",
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"android.permission.RECORD_AUDIO",
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"android.permission.SEND_SMS",
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"android.permission.SYSTEM_ALERT_WINDOW",
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"android.permission.USE_CREDENTIALS",
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"android.permission.USE_SIP",
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"com.android.browser.permission.READ_HISTORY_BOOKMARKS",
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]
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class Packages(AndroidExtraction):
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"""This module extracts the list of installed packages."""
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@ -69,6 +92,45 @@ class Packages(AndroidExtraction):
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result["matched_indicator"] = ioc
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self.detected.append(result)
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def _get_package_details(self, package_name):
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details = {
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"uid": "",
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"version_name": "",
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"version_code": "",
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"timestamp": "",
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"first_install_time": "",
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"last_update_time": "",
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"requested_permissions": [],
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}
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in_permissions = False
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for line in self._adb_command(f"dumpsys package {package_name}").split("\n"):
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if in_permissions:
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if line.startswith(" " * 4) and not line.startswith(" " * 6):
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in_permissions = False
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continue
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permission = line.strip().split(":")[0]
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details["requested_permissions"].append(permission)
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if line.strip().startswith("userId="):
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details["uid"] = line.split("=")[1].strip()
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elif line.strip().startswith("versionName="):
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details["version_name"] = line.split("=")[1].strip()
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elif line.strip().startswith("versionCode="):
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details["version_code"] = line.split("=", 1)[1].strip()
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elif line.strip().startswith("timeStamp="):
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details["timestamp"] = line.split("=")[1].strip()
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elif line.strip().startswith("firstInstallTime="):
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details["first_install_time"] = line.split("=")[1].strip()
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elif line.strip().startswith("lastUpdateTime="):
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details["last_update_time"] = line.split("=")[1].strip()
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elif line.strip() == "requested permissions:":
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in_permissions = True
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continue
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return details
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def _get_files_for_package(self, package_name):
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output = self._adb_command(f"pm path {package_name}")
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output = output.strip().replace("package:", "")
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@ -97,9 +159,7 @@ class Packages(AndroidExtraction):
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def run(self):
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self._adb_connect()
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packages = self._adb_command("pm list packages -U -u -i -f")
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if packages.strip() == "Error: Unknown option: -U":
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packages = self._adb_command("pm list packages -u -i -f")
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packages = self._adb_command("pm list packages -u -i -f")
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for line in packages.split("\n"):
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line = line.strip()
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@ -117,31 +177,21 @@ class Packages(AndroidExtraction):
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if installer == "null":
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installer = None
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try:
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uid = fields[2].split(":")[1].strip()
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except IndexError:
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uid = None
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dumpsys = self._adb_command(f"dumpsys package {package_name} | grep -A2 timeStamp").split("\n")
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timestamp = dumpsys[0].split("=")[1].strip()
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first_install = dumpsys[1].split("=")[1].strip()
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last_update = dumpsys[2].split("=")[1].strip()
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package_files = self._get_files_for_package(package_name)
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self.results.append({
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new_package = {
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"package_name": package_name,
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"file_name": file_name,
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"installer": installer,
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"timestamp": timestamp,
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"first_install_time": first_install,
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"last_update_time": last_update,
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"uid": uid,
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"disabled": False,
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"system": False,
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"third_party": False,
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"files": package_files,
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})
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}
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package_details = self._get_package_details(package_name)
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new_package.update(package_details)
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self.results.append(new_package)
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cmds = [
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{"field": "disabled", "arg": "-d"},
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@ -160,6 +210,19 @@ class Packages(AndroidExtraction):
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if result["package_name"] == package_name:
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self.results[i][cmd["field"]] = True
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for result in self.results:
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if not result["third_party"]:
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continue
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dangerous_permissions_count = 0
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for perm in result["requested_permissions"]:
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if perm in DANGEROUS_PERMISSIONS:
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dangerous_permissions_count += 1
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if dangerous_permissions_count >= DANGEROUS_PERMISSIONS_THRESHOLD:
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self.log.info("Third-party package \"%s\" requested %d potentially dangerous permissions",
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result["package_name"], dangerous_permissions_count)
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packages_to_lookup = []
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for result in self.results:
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if result["system"]:
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