Upload a forensic snapshot to an AWS S3 bucket

Follow these instructions to create a managed policy in AWS.

1. In the Amazon Web Services (AWS) dashboard go to IAM listed under Security, Identity and Compliance.
2. Click Policies on the left side navigation bar.
3. Click Create Policy.
4. Click JSON.
5. Add the following policy:

   {
       "Version": "2012-10-17",
       "Statement": [
           {
               "Sid": "AllowPutObject",
               "Effect": "Allow",
               "Action": [ 
                  "s3:PutObject",
                  "s3:GetBucketLocation"
               ],
               "Resource": [
                   "arn:aws:s3:::<bucket-name>",
                   "arn:aws:s3:::<bucket-name>/*"
               ]
           }
       ]
   }

   Note You need to replace <bucket-name> with the name of the bucket where your snapshots will be uploaded.
6. Click Review Policy to check the copied policy is valid.
7. Name the policy.

   Example: Sophos-Central-Forensic-Snapshot-Upload.

8. Give a description.

   Example: This policy allows Sophos Central to upload forensic snapshots to a given S3 bucket.

9. Click Create Policy.

Follow these intructions to add your Amazon Web Services (AWS) account to Sophos Central.

1. In Sophos Central, go to Global Settings and click Forensic Snapshots.
2. Turn on Upload forensic snapshot to an AWS S3 bucket.
3. Make a note of AWS Account ID and AWS External ID.
4. In Amazon Web Services create the IAM Role by doing the following:
   1. In the Amazon Web Services dashboard go to Identity & Access Management listed under Security & Identity.
   2. Click Roles on the left side navigation bar.
   3. Click Create role.
   4. Click Another AWS account.
   5. Enter the Account ID and External ID provided by Sophos Central.
   6. Turn on Require external ID.
      This is recommended best practice when a third party assumes this role.
   7. Turn off Require MFA.
   8. Click Next: Permissions.
   9. Attach the policy you created earlier, and click Next: Tags.
   10. Leave the optional tags blank and click Next: Review.
   11. Enter a Role name, and optionally a Role description.
   12. Click Create Role and copy the Role ARN (Amazon Resource Name).
5. You need to wait for this role to propagate to all regions in AWS before you can add the account to Sophos Central. This can take up to five minutes.
6. In Sophos Central, on the Forensic Snapshots page, do the following:
   1. Enter the S3 bucket name.This must match the bucket name in the managed policy.
   2. Optionally, enter a bucket directory name where you want the snapshots to be uploaded to in the S3 bucket.
   3. Enter the Role ARN created in AWS.
   4. Click Save.

We recommend you create a bucket policy to restrict access to the S3 bucket that you want to upload forensic snapshots to.

{ 
   "Version":"2012-10-17",
   "Id":"S3PolicyIPRestrict",
   "Statement":[ 
      { 
         "Sid":"IPAllow",
         "Effect":"Allow",
         "Principal":{ 
            "AWS":"*"
         },
         "Action":"s3:PutObject",
         "Resource":"arn:aws:s3:::<bucket-name>",
         "Condition":{ 
            "IpAddress":{ 
               "aws:SourceIp":"192.168.143.0/24"
            }
         }
      },
      { 
         "Sid":"AllowRead",
         "Action":[ 
            "s3:GetObject"
         ],
         "Effect":"Allow",
         "Resource":"arn:aws:s3:::<bucket-name>",
         "Principal":{ 
            "AWS":[ 
               "arn:aws:iam::123456789012:root"
            ]
         }
      }
   ]
}