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"""
This program is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Copyright © 2019 Cloud Linux Software Inc.
This software is also available under ImunifyAV commercial license,
see <https://www.imunify360.com/legal/eula>
"""
from imav.malwarelib.config import MalwareHitStatus
from imav.malwarelib.model import MalwareHit
from defence360agent.contracts.hook_events import HookEvent
from defence360agent.contracts.messages import MessageType
from defence360agent.contracts.plugins import (
expect,
)
from defence360agent.hooks.execute import execute_hooks
from defence360agent.plugins.event_hook_executor import EventHookExecutor
EVENTS = (
HookEvent.MalwareScanningStarted,
HookEvent.MalwareScanningFinished,
HookEvent.MalwareCleanupStarted,
HookEvent.MalwareCleanupFinished,
HookEvent.MalwareDetectedCritical,
)
async def detected_hook(
sink, scan_id, scan_type, started, path, total, error=None
):
total_malicious, hits = MalwareHit.malicious_list(
by_scan_id=scan_id, ignore_cleaned=True
)
if hits:
malware_detected = HookEvent.MalwareDetectedCritical(
scan_id=scan_id,
scan_type=scan_type,
error=error,
started=started,
path=path,
total_files=total,
total_malicious=total_malicious,
DUMP=hits,
)
await sink.process_message(malware_detected)
class ImavEventHookExecutor(EventHookExecutor):
@expect(*EVENTS)
async def receive_event(self, event):
self._loop.create_task(execute_hooks(event))
@expect(MessageType.MalwareCleanup)
async def process_malware_cleanup(self, message):
error = message["error"]
status = "failed" if error else "ok"
hits = message["hits"]
cleaned = [h for h in hits if h.status in MalwareHitStatus.RESTORABLE]
dump = [hit.as_dict() for hit in hits]
malware_cleanup = HookEvent.MalwareCleanupFinished(
cleanup_id=message["cleanup_id"],
started=message["started"],
error=error,
total_files=len(hits),
total_cleaned=len(cleaned),
status=status,
DUMP=dump,
)
await self._sink.process_message(malware_cleanup)
@expect(MessageType.MalwareScan)
async def process_malware_scan(self, message):
summary = message["summary"]
# Message without summary means that detached scan is finished
# and summary will arrive along with results in another message - this
# is when the hooks should be called.
if not summary.get("path"):
return
await detected_hook(
self._sink,
summary["scanid"],
summary["type"],
summary["started"],
summary["path"],
summary["total_files"],
summary["error"],
)