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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright {yyyy} Authors of KubeArmor + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. \ No newline at end of file diff --git a/crowdstrike-bsod-fix/README.md b/crowdstrike-bsod-fix/README.md new file mode 100644 index 0000000..289f08a --- /dev/null +++ b/crowdstrike-bsod-fix/README.md @@ -0,0 +1,30 @@ +# CrowdStrike BSoD Rememdiation + +``` +# expected pip version 24.1.2 +pip3 install -r requirements.txt +``` + +## AWS + +### Prerequisites +1. Download and install [aws cli](https://aws.amazon.com/cli/) +1. aws credentials are configured using `aws configure` +2. the region in the credentials are set properly + +### Using AWS + +```bash +python3 main.py --csp aws --instances i-0314fe10fbb79efd1,i-0214ae20ecc98e5d2 +``` + +# Azure + +### Prerequisites +1. Download and install [az cli](https://learn.microsoft.com/en-us/cli/azure/install-azure-cli-linux) +1. Configure `az login` such that it points to the right account/subscription + +### Using Azure +```bash +python3 main.py --csp azure --instances sample-instance +``` \ No newline at end of file diff --git a/crowdstrike-bsod-fix/csp_aws.py b/crowdstrike-bsod-fix/csp_aws.py new file mode 100644 index 0000000..05d7bda --- /dev/null +++ b/crowdstrike-bsod-fix/csp_aws.py @@ -0,0 +1,139 @@ +# SPDX-License-Identifier: Apache-2.0 +# Copyright 2024 AccuKnox +# Copyright 2024 XCitium + +import logging +import time +import boto3 +import subprocess +import os +import glob + +logging.basicConfig(level=logging.INFO) +log = logging.getLogger("aws") + +def detach_volumes(ec2, inst_id, dry_run=False): + try: + volumes = ec2.describe_volumes( + Filters=[{"Name": "attachment.instance-id", "Values": [inst_id]}] + ) + except Exception as e: + if "DryRunOperation" not in str(e): + log.error(f"Failed to get volumes for instance {inst_id}: {e}") + return + + for volume in volumes["Volumes"]: + vid = volume["VolumeId"] + try: + res = ec2.detach_volume(VolumeId=vid, DryRun=dry_run) + waiter = ec2.get_waiter("volume_available") + waiter.wait(VolumeIds=[vid]) + except Exception as e: + if "DryRunOperation" not in str(e): + log.error(f"Failed to detach volume {vid}: {e}") + continue + yield vid, res["Device"] + +# Function to attach volume to the current instance +def attach_volume(ec2, inst_id, vid, dev, dry_run=False): + try: + ec2.attach_volume( + InstanceId=inst_id, VolumeId=vid, Device=dev, DryRun=dry_run + ) + waiter = ec2.get_waiter("volume_in_use") + waiter.wait(VolumeIds=[vid]) + except Exception as e: + if "DryRunOperation" not in str(e): + log.error(f"Failed to attach volume {vid}: {e}") + + +# Function to detach volume from the current instance +def detach_volume(ec2, vid, dry_run=False): + try: + ec2.detach_volume(VolumeId=vid, DryRun=dry_run) + waiter = ec2.get_waiter("volume_available") + waiter.wait(VolumeIds=[vid]) + except Exception as e: + if "DryRunOperation" not in str(e): + log.error(f"Failed to detach volume {vid}: {e}") + +# Function to get the device name +def get_device_name(): + res = subprocess.run(["fdisk -l"], capture_output=True, shell=True).stdout.decode() + for line in res.splitlines(): + if "NTFS" in line: + device_name = line.split(" ")[0] + return device_name + return "" + +# Function to remove the file +def remove_crowdstrike_file(mount_point): + file_pattern = f"{mount_point}/Windows/System32/drivers/CrowdStrike/C-00000291*.sys" + for file in glob.glob(file_pattern): + os.remove(file) + +# Function to start an instance +def start_instance(ec2, inst_id, dry_run=False): + try: + ec2.start_instances(InstanceIds=[inst_id], DryRun=dry_run) + waiter = ec2.get_waiter("instance_running") + waiter.wait(InstanceIds=[inst_id]) + except Exception as e: + if "DryRunOperation" not in str(e): + log.error(f"Failed to start instance {inst_id}: {e}") + +# Function to stop an instance +def stop_instance(ec2, inst_id, dry_run=False): + try: + ec2.stop_instances(InstanceIds=[inst_id], DryRun=dry_run) + waiter = ec2.get_waiter("instance_stopped") + waiter.wait(InstanceIds=[inst_id]) + except Exception as e: + if "DryRunOperation" not in str(e): + log.error(f"Failed to stop instance {inst_id}: {e}") + +def handle_aws(args): + log.info(f"called {args.csp}") + instances=args.instances.split(",") + mount_point = os.getcwd() + "/windows" + os.makedirs(mount_point, exist_ok=True) + log.info(f"mount directory {mount_point}") + ec2 = boto3.client('ec2') + # response = ec2.describe_instances() + # print(response) + # return + + for inst_id in instances: + log.info(f"checking {inst_id}") + try: + stop_instance(ec2=ec2, inst_id=inst_id, dry_run=args.dry_run) + except Exception as err: + log.error(f"could not stop {inst_id}: {err}") + continue + + for vid, dev in detach_volumes(ec2=ec2, inst_id=inst_id, dry_run=args.dry_run): + try: + attach_volume(ec2=ec2, inst_id=inst_id, vid=vid, dev="/dev/sdz", dry_run=args.dry_run) + except Exception as err: + if "DryRunOperation" not in str(err): + log.error(f"attach vol failed {vid}: {err}") + continue + + try: + devname="" + for retry in range(20): + devname=get_device_name() + if devname: + break + time.sleep(1) + if not args.dry_run: + subprocess.run( + ["mount", devname, mount_point], capture_output=True + ) + remove_crowdstrike_file(mount_point) + subprocess.run(["umount", mount_point], capture_output=True) + finally: + detach_volume(ec2, vid, dry_run=args.dry_run) + attach_volume(ec2, inst_id, vid, dev, dry_run=args.dry_run) + + start_instance(ec2, inst_id, dry_run=args.dry_run) diff --git a/crowdstrike-bsod-fix/csp_azure.py b/crowdstrike-bsod-fix/csp_azure.py new file mode 100644 index 0000000..88baaa8 --- /dev/null +++ b/crowdstrike-bsod-fix/csp_azure.py @@ -0,0 +1,35 @@ +# SPDX-License-Identifier: Apache-2.0 +# Copyright 2024 AccuKnox +# Copyright 2024 XCitium + +# Import the needed credential and management objects from the libraries. +import logging +from azure.identity import DefaultAzureCredential +from azure.mgmt.compute import ComputeManagementClient +logging.basicConfig(level=logging.INFO) +log = logging.getLogger("azure") + +def handle_azure(args): + if args.az_res_grp: + log.info(f"using azure resource group {args.az_res_grp}") + else: + log.error("CSP azure needs --az_res_grp to be specified") + return + # Acquire a credential object. + client = ComputeManagementClient( + credential=DefaultAzureCredential(), + subscription_id="{subscription-id}", + ) + + instances=args.instances.split(",") + for inst_id in instances: + log.info(f"checking {inst_id}") + try: + response = client.virtual_machines.get( + resource_group_name=args.az_res_grp, + vm_name=inst_id, + ) + print(response) + except Exception as err: + log.error(f"instance get failed {inst_id}: {err}") + continue \ No newline at end of file diff --git a/crowdstrike-bsod-fix/csp_gcp.py b/crowdstrike-bsod-fix/csp_gcp.py new file mode 100644 index 0000000..c85f5ef --- /dev/null +++ b/crowdstrike-bsod-fix/csp_gcp.py @@ -0,0 +1,6 @@ +# SPDX-License-Identifier: Apache-2.0 +# Copyright 2024 AccuKnox +# Copyright 2024 XCitium + +def handle_gcp(args): + print(f"called {args.csp}") \ No newline at end of file diff --git a/crowdstrike-bsod-fix/main.py b/crowdstrike-bsod-fix/main.py new file mode 100644 index 0000000..33d6c4c --- /dev/null +++ b/crowdstrike-bsod-fix/main.py @@ -0,0 +1,33 @@ +# CrowdStrike BSoD Remediation for AWS, GCP, Azure +# Copyright 2024 AccuKnox +# Copyright 2024 XCitium +# Note: Use it at your own risk +# License: Apache 2 + +import argparse +import logging + +logging.basicConfig(level=logging.INFO) +log = logging.getLogger("main") + +supported_csps=['aws', 'gcp', 'azure'] + +def main() -> None: + argp = argparse.ArgumentParser() + argp.add_argument("--csp", required=True, help="Cloud Service Provider name [aws/gcp/azure]") + argp.add_argument("--instances", required=True, help="Instance list separated by comma") + argp.add_argument("--az_res_grp", required=False, help="Azure resource group") + argp.add_argument("--dry-run", action="store_true") + args = argp.parse_args() + + if args.csp not in ['aws', 'gcp', 'azure']: + log.error(f"unsupported cloud service provider [{args.csp}]. Supported {supported_csps}.") + exit(1) + log.info(f"using cloud service provider {args.csp}") + log.info(f"Instances {args.instances}") + module = __import__(f"csp_{args.csp}") + func = getattr(module, f"handle_{args.csp}") + func(args) # calls handle_aws, handle_gcp, handle_azure + +if __name__ == "__main__": + main() diff --git a/crowdstrike-bsod-fix/requirements.txt b/crowdstrike-bsod-fix/requirements.txt new file mode 100644 index 0000000..1cf4cdc --- /dev/null +++ b/crowdstrike-bsod-fix/requirements.txt @@ -0,0 +1,5 @@ +boto3==1.34.145 +azure-mgmt-resource +azure-identity +azure-mgmt-compute +python-dotenv \ No newline at end of file