Cobra
e15e077be8
When wlan0 is the primary data interface (WiFi-only deployment), changing its MAC via SIOCSIFHWADDR drops the AP association and puts all AF_PACKET sockets into ENETDOWN permanently until wpa_supplicant re-associates. - _apply_profile: skip set_mac if _eth_iface is a WiFi interface - _apply_profile: skip WiFi set_mac if _wifi_iface == _eth_iface (same card) - stop: mirror the same skip logic for MAC restoration DHCP hostname + TCP stack tuning still applied for blending on WiFi-only nodes.
338 lines
13 KiB
Python
338 lines
13 KiB
Python
#!/usr/bin/env python3
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"""Innocuous MAC profile manager — select and apply a believable device identity.
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Queries data/innocuous_macs.db for consumer device profiles (Fire TV, iPhone,
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printers, etc.), sets MAC + DHCP hostname + vendor class + TCP stack params to
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match the selected device. The goal: look like something that belongs on every
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network.
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"""
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import json
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import logging
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import os
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import random
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import sqlite3
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import time
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from pathlib import Path
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from typing import Optional
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from modules.base import BaseModule
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from utils.networking import (
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get_mac,
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get_primary_interface,
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get_wifi_interfaces,
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set_mac,
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)
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from utils.stealth import set_sysctl, set_tcp_timestamps, set_tcp_window, set_ttl
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logger = logging.getLogger("sensor.stealth.mac_manager")
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# Category preferences per network type
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_BUSINESS_CATEGORIES = ("printers", "network", "smart_home")
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_HOME_CATEGORIES = ("streaming", "smart_home", "phones", "gaming")
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_DEFAULT_CATEGORIES = ("streaming", "smart_home", "phones")
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# Map config shorthand to DB device_type values
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_CATEGORY_MAP = {
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"streaming": ("smart_tv", "streaming"),
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"phones": ("phone", "tablet"),
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"smart_home": ("smart_speaker", "iot"),
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"printers": ("printer",),
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"gaming": ("gaming",),
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"network": ("printer", "iot"),
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}
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class MacManager(BaseModule):
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"""Select and apply a consumer-device MAC profile for network blending."""
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name = "mac_manager"
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module_type = "stealth"
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priority = -400
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requires_root = True
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def __init__(self, bus, state, config, engine=None):
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super().__init__(bus, state, config, engine)
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self._profile: Optional[dict] = None
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self._eth_iface: Optional[str] = None
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self._wifi_iface: Optional[str] = None
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self._original_eth_mac: Optional[str] = None
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self._original_wifi_mac: Optional[str] = None
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self._db_path = self._resolve_db_path()
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# ------------------------------------------------------------------
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# BaseModule interface
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# ------------------------------------------------------------------
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def start(self) -> None:
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if self._running:
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return
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self._eth_iface = self.config.get("network", {}).get(
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"primary_interface", "auto"
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)
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if self._eth_iface == "auto":
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self._eth_iface = get_primary_interface()
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wifi_ifaces = get_wifi_interfaces()
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wifi_cfg = self.config.get("network", {}).get("wifi", {}).get("interface", "wlan0")
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self._wifi_iface = wifi_cfg if wifi_cfg in wifi_ifaces else (wifi_ifaces[0] if wifi_ifaces else None)
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# Save originals for restore on stop
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if self._eth_iface:
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try:
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self._original_eth_mac = get_mac(self._eth_iface)
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except Exception:
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pass
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if self._wifi_iface:
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try:
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self._original_wifi_mac = get_mac(self._wifi_iface)
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except Exception:
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pass
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# Select and apply profile
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self._profile = self._select_profile()
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if self._profile is None:
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logger.warning("No MAC profile found — using random consumer OUI fallback")
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self._profile = self._fallback_profile()
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self._apply_profile(self._profile)
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# Persist for other modules
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self.state.set(self.name, "profile", json.dumps(self._profile))
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self.state.set_module_status(self.name, "running", pid=os.getpid())
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self._running = True
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self._pid = os.getpid()
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self._start_time = time.time()
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logger.info(
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"MAC profile applied: %s (%s) — MAC %s, hostname %s",
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self._profile.get("device_name", "unknown"),
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self._profile.get("vendor", "unknown"),
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self._profile.get("applied_mac", "?"),
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self._profile.get("dhcp_hostname", "?"),
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)
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def stop(self) -> None:
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if not self._running:
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return
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# Restore original MACs on clean exit — skip WiFi interfaces to avoid
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# dropping the active association.
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wifi_ifaces = set(get_wifi_interfaces())
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try:
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if self._eth_iface and self._original_eth_mac and self._eth_iface not in wifi_ifaces:
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set_mac(self._eth_iface, self._original_eth_mac)
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if (self._wifi_iface and self._original_wifi_mac
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and self._wifi_iface != self._eth_iface
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and self._wifi_iface not in wifi_ifaces):
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set_mac(self._wifi_iface, self._original_wifi_mac)
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except Exception as exc:
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logger.warning("Failed to restore original MAC: %s", exc)
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self._cleanup_dhclient_conf()
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self._running = False
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self.state.set_module_status(self.name, "stopped")
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logger.info("MacManager stopped — original MACs restored")
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def status(self) -> dict:
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base = {
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"running": self._running,
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"pid": self._pid,
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"uptime": time.time() - self._start_time if self._start_time else 0,
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}
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if self._profile:
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base["profile_name"] = self._profile.get("device_name", "unknown")
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base["applied_mac"] = self._profile.get("applied_mac", "unknown")
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base["dhcp_hostname"] = self._profile.get("dhcp_hostname", "unknown")
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if self._eth_iface:
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try:
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base["current_eth_mac"] = get_mac(self._eth_iface)
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except Exception:
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base["current_eth_mac"] = "error"
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return base
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def configure(self, config: dict) -> None:
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self.config.update(config)
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if self._running:
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# Re-select and apply on config change
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self._profile = self._select_profile()
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if self._profile:
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self._apply_profile(self._profile)
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self.state.set(self.name, "profile", json.dumps(self._profile))
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# ------------------------------------------------------------------
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# Profile selection
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# ------------------------------------------------------------------
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def _resolve_db_path(self) -> str:
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"""Locate innocuous_macs.db relative to project root."""
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candidates = [
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os.path.join(os.path.dirname(__file__), "..", "..", "data", "innocuous_macs.db"),
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"/opt/.cache/bb/data/innocuous_macs.db",
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]
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for p in candidates:
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resolved = os.path.realpath(p)
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if os.path.isfile(resolved):
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return resolved
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# Default — will be created/populated by setup
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return os.path.realpath(candidates[0])
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def _select_profile(self) -> Optional[dict]:
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"""Select a MAC profile from the database based on config."""
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if not os.path.isfile(self._db_path):
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logger.warning("innocuous_macs.db not found at %s", self._db_path)
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return None
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stealth_cfg = self.config.get("stealth", {})
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mac_profile = stealth_cfg.get("mac_profile", "auto")
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network_type = stealth_cfg.get("mac_network_type", "auto")
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conn = sqlite3.connect(self._db_path)
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conn.row_factory = sqlite3.Row
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try:
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if mac_profile not in ("auto", None) and mac_profile not in _CATEGORY_MAP:
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# Specific device name requested
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row = conn.execute(
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"SELECT * FROM mac_profiles WHERE device_name = ? LIMIT 1",
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(mac_profile,),
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).fetchone()
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if row:
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return dict(row)
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# Category-based selection
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if mac_profile == "auto" or mac_profile is None:
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categories = self._pick_categories(network_type)
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else:
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categories = _CATEGORY_MAP.get(mac_profile, _DEFAULT_CATEGORIES)
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placeholders = ",".join("?" for _ in categories)
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rows = conn.execute(
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f"SELECT * FROM mac_profiles WHERE device_type IN ({placeholders})",
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categories,
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).fetchall()
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if rows:
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return dict(random.choice(rows))
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return None
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except sqlite3.OperationalError:
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logger.warning("mac_profiles table missing — DB not seeded, using fallback")
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return None
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finally:
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conn.close()
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def _pick_categories(self, network_type: str) -> tuple:
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"""Choose device categories appropriate for the network type."""
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if network_type == "business":
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cat_keys = _BUSINESS_CATEGORIES
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elif network_type == "home":
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cat_keys = _HOME_CATEGORIES
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else:
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# Auto: default safe categories
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cat_keys = _DEFAULT_CATEGORIES
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types = []
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for key in cat_keys:
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types.extend(_CATEGORY_MAP.get(key, ()))
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return tuple(types)
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def _fallback_profile(self) -> dict:
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"""Generate a plausible fallback profile without the database."""
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# Amazon Fire TV Stick OUI
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oui = "FC:65:DE"
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suffix = ":".join(f"{random.randint(0, 255):02x}" for _ in range(3))
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return {
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"device_type": "streaming",
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"vendor": "Amazon",
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"device_name": "Fire TV Stick 4K",
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"oui": oui,
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"dhcp_hostname": "amazon-fire-tv",
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"dhcp_vendor_class": "amazon-fire-tv-stick",
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"ttl": 64,
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"tcp_window": 65535,
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}
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# ------------------------------------------------------------------
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# Apply profile to system
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# ------------------------------------------------------------------
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def _apply_profile(self, profile: dict) -> None:
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"""Set MAC, DHCP config, TCP stack to match the selected profile."""
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oui = profile.get("oui", "FC:65:DE")
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suffix = ":".join(f"{random.randint(0, 255):02x}" for _ in range(3))
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new_mac = f"{oui}:{suffix}"
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profile["applied_mac"] = new_mac
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wifi_ifaces = set(get_wifi_interfaces())
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# Set MAC on Ethernet — skip if it's also a WiFi interface (changing MAC
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# on an associated WiFi interface drops the connection and causes ENETDOWN
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# on all AF_PACKET sockets bound to it).
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if self._eth_iface:
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if self._eth_iface in wifi_ifaces:
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logger.info(
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"Skipping MAC change on %s — active WiFi interface, would break association",
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self._eth_iface,
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)
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else:
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try:
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set_mac(self._eth_iface, new_mac)
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logger.debug("Set %s MAC to %s", self._eth_iface, new_mac)
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except Exception as exc:
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logger.error("Failed to set MAC on %s: %s", self._eth_iface, exc)
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# Set MAC on WiFi only if it's a separate interface from the primary eth
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# (e.g., a dedicated monitor card). Same interface = already handled above.
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if self._wifi_iface and self._wifi_iface != self._eth_iface:
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wifi_suffix = ":".join(f"{random.randint(0, 255):02x}" for _ in range(3))
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wifi_mac = f"{oui}:{wifi_suffix}"
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try:
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set_mac(self._wifi_iface, wifi_mac)
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profile["applied_wifi_mac"] = wifi_mac
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logger.debug("Set %s MAC to %s", self._wifi_iface, wifi_mac)
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except Exception as exc:
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logger.error("Failed to set WiFi MAC on %s: %s", self._wifi_iface, exc)
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# DHCP configuration
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self._write_dhclient_conf(profile)
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# TCP stack tuning
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ttl = profile.get("ttl", 64)
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tcp_win = profile.get("tcp_window", 65535)
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set_ttl(ttl)
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set_tcp_window(tcp_win)
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set_tcp_timestamps(True) # Most consumer devices have timestamps enabled
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logger.debug("TCP stack: TTL=%d, window=%d", ttl, tcp_win)
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def _write_dhclient_conf(self, profile: dict) -> None:
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"""Write dhclient.conf with hostname + vendor class matching the profile."""
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hostname = profile.get("dhcp_hostname", "localhost")
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vendor_class = profile.get("dhcp_vendor_class", "")
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conf_path = "/etc/dhcp/dhclient.conf.d"
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conf_file = os.path.join(conf_path, "bb-profile.conf")
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try:
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os.makedirs(conf_path, exist_ok=True)
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lines = [
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f'send host-name "{hostname}";',
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]
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if vendor_class:
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lines.append(f'send vendor-class-identifier "{vendor_class}";')
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with open(conf_file, "w") as f:
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f.write("\n".join(lines) + "\n")
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logger.debug("Wrote DHCP config: hostname=%s, vendor=%s", hostname, vendor_class)
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except (IOError, PermissionError) as exc:
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logger.warning("Failed to write dhclient.conf: %s", exc)
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def _cleanup_dhclient_conf(self) -> None:
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"""Remove our DHCP config on clean exit."""
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conf_file = "/etc/dhcp/dhclient.conf.d/bb-profile.conf"
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try:
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if os.path.isfile(conf_file):
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os.unlink(conf_file)
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except (IOError, PermissionError):
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pass
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