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Guardduty (#8553)

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* Added initial code for guard duty, tested some of it

* Add finished (*) guard duty code

* Removed temp workaround stuff
This commit is contained in:
Zachary Winnerman 2022-11-03 13:59:35 -04:00 committed by GitHub
parent 5d3e27d169
commit 6afcf161db
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22
infrastructure/guardduty/.terraform.lock.hcl Normal file
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# This file is maintained automatically by "terraform init".
# Manual edits may be lost in future updates.
provider "registry.terraform.io/hashicorp/aws" {
version = "4.10.0"
constraints = "~> 4.10.0"
hashes = [
"h1:S6xGPRL08YEuBdemiYZyIBf/YwM4OCvzVuaiuU6kLjc=",
"zh:0a2a7eabfeb7dbb17b7f82aff3fa2ba51e836c15e5be4f5468ea44bd1299b48d",
"zh:23409c7205d13d2d68b5528e1c49e0a0455d99bbfec61eb0201142beffaa81f7",
"zh:3adad2245d97816f3919778b52c58fb2de130938a3e9081358bfbb72ec478d9a",
"zh:5bf100aba6332f24b1ffeae7536d5d489bb907bf774a06b95f2183089eaf1a1a",
"zh:63c3a24c0c229a1d3390e6ea2454ba4d8ace9b94e086bee1dbdcf665ae969e15",
"zh:6b76f5ffd920f0a750da3a4ff1d00eab18d9cd3731b009aae3df4135613bad4d",
"zh:8cd6b1e6b51e8e9bbe2944bb169f113d20d1d72d07ccd1b7b83f40b3c958233e",
"zh:9b12af85486a96aedd8d7984b0ff811a4b42e3d88dad1a3fb4c0b580d04fa425",
"zh:c5c31f58fb5bd6aebc6c662a4693640ec763cb3399cce0b592101cf24ece1625",
"zh:cc485410be43d6ad95d81b9e54cc4d2117aadf9bf5941165a9df26565d9cce42",
"zh:cebb89c74b6a3dc6780824b1d1e2a8d16a51e75679e14ad0b830d9f7da1a3a67",
"zh:e7dc427189cb491e1f96e295101964415cbf8630395ee51e396d2a811f365237",
]
}

3
infrastructure/guardduty/README.md Normal file
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basing the architecture off of https://docs.aws.amazon.com/prescriptive-guidance/latest/patterns/use-terraform-to-automatically-enable-amazon-guardduty-for-an-organization.html but using workspaces instead of templates.
Use apply.sh to automatically apply the terraform code in all regions. There is an apply.sh in both this folder and the members folder. The findings folder exists in only one region, so just do a normal apply there.

5
infrastructure/guardduty/apply.sh Executable file
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#!/bin/bash
for region in $(aws ec2 describe-regions | jq -r '.Regions[] | .RegionName'); do
terraform workspace select $region || break
terraform apply -auto-approve || break
done

22
infrastructure/guardduty/findings/.terraform.lock.hcl Normal file
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# This file is maintained automatically by "terraform init".
# Manual edits may be lost in future updates.
provider "registry.terraform.io/hashicorp/aws" {
version = "4.10.0"
constraints = "~> 4.10.0"
hashes = [
"h1:S6xGPRL08YEuBdemiYZyIBf/YwM4OCvzVuaiuU6kLjc=",
"zh:0a2a7eabfeb7dbb17b7f82aff3fa2ba51e836c15e5be4f5468ea44bd1299b48d",
"zh:23409c7205d13d2d68b5528e1c49e0a0455d99bbfec61eb0201142beffaa81f7",
"zh:3adad2245d97816f3919778b52c58fb2de130938a3e9081358bfbb72ec478d9a",
"zh:5bf100aba6332f24b1ffeae7536d5d489bb907bf774a06b95f2183089eaf1a1a",
"zh:63c3a24c0c229a1d3390e6ea2454ba4d8ace9b94e086bee1dbdcf665ae969e15",
"zh:6b76f5ffd920f0a750da3a4ff1d00eab18d9cd3731b009aae3df4135613bad4d",
"zh:8cd6b1e6b51e8e9bbe2944bb169f113d20d1d72d07ccd1b7b83f40b3c958233e",
"zh:9b12af85486a96aedd8d7984b0ff811a4b42e3d88dad1a3fb4c0b580d04fa425",
"zh:c5c31f58fb5bd6aebc6c662a4693640ec763cb3399cce0b592101cf24ece1625",
"zh:cc485410be43d6ad95d81b9e54cc4d2117aadf9bf5941165a9df26565d9cce42",
"zh:cebb89c74b6a3dc6780824b1d1e2a8d16a51e75679e14ad0b830d9f7da1a3a67",
"zh:e7dc427189cb491e1f96e295101964415cbf8630395ee51e396d2a811f365237",
]
}

158
infrastructure/guardduty/findings/main.tf Normal file
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terraform {
required_providers {
aws = {
source = "hashicorp/aws"
version = "~> 4.10.0"
}
}
backend "s3" {
bucket = "fleet-terraform-state20220408141538466600000002"
key = "root/guardduty/findings/terraform.tfstate" # This should be set to account_alias/unique_key/terraform.tfstate
workspace_key_prefix = "root" # This should be set to the account alias
region = "us-east-2"
encrypt = true
kms_key_id = "9f98a443-ffd7-4dbe-a9c3-37df89b2e42a"
dynamodb_table = "tf-remote-state-lock"
role_arn = "arn:aws:iam::353365949058:role/terraform-root"
}
}
provider "aws" {
region = "us-east-2"
assume_role {
role_arn = "arn:aws:iam::353365949058:role/admin"
}
default_tags {
tags = {
environment = "guardduty-${terraform.workspace}"
terraform = "https://github.com/fleetdm/fleet/tree/main/infrastructure/guardduty/findings"
state = "s3://fleet-terraform-state20220408141538466600000002/root/guardduty/findings/terraform.tfstate"
}
}
}
data "aws_caller_identity" "current" {}
data "aws_region" "current" {}
data "aws_iam_policy_document" "bucket_pol" {
statement {
sid = "Allow PutObject"
actions = [
"s3:PutObject"
]
resources = [
"${aws_s3_bucket.gd_bucket.arn}/*"
]
principals {
type = "Service"
identifiers = ["guardduty.amazonaws.com"]
}
}
statement {
sid = "Allow GetBucketLocation"
actions = [
"s3:GetBucketLocation"
]
resources = [
aws_s3_bucket.gd_bucket.arn
]
principals {
type = "Service"
identifiers = ["guardduty.amazonaws.com"]
}
}
}
data "aws_iam_policy_document" "kms_pol" {
statement {
sid = "Allow GuardDuty to encrypt findings"
actions = [
"kms:GenerateDataKey"
]
resources = [
"arn:aws:kms:${data.aws_region.current.name}:${data.aws_caller_identity.current.account_id}:key/*"
]
principals {
type = "Service"
identifiers = ["guardduty.amazonaws.com"]
}
}
statement {
sid = "Allow all users to modify/delete key (test only)"
actions = [
"kms:*"
]
resources = [
"arn:aws:kms:${data.aws_region.current.name}:${data.aws_caller_identity.current.account_id}:key/*"
]
principals {
type = "AWS"
identifiers = ["arn:aws:iam::${data.aws_caller_identity.current.account_id}:root"]
}
}
}
resource "aws_s3_bucket" "gd_bucket" {
bucket = "fleet-guardduty-findings"
force_destroy = true
}
resource "aws_s3_bucket_acl" "gd_bucket_acl" {
bucket = aws_s3_bucket.gd_bucket.id
acl = "private"
}
resource "aws_s3_bucket_policy" "gd_bucket_policy" {
bucket = aws_s3_bucket.gd_bucket.id
policy = data.aws_iam_policy_document.bucket_pol.json
}
resource "aws_kms_key" "gd_key" {
description = "Temporary key for AccTest of TF"
deletion_window_in_days = 7
policy = data.aws_iam_policy_document.kms_pol.json
}
output "kms_key" {
value = aws_kms_key.gd_key
}
resource "aws_s3_bucket_public_access_block" "access_good_1" {
bucket = aws_s3_bucket.gd_bucket.id
block_public_acls = true
block_public_policy = true
ignore_public_acls = true
restrict_public_buckets = true
}
resource "aws_s3_bucket_server_side_encryption_configuration" "main" {
bucket = aws_s3_bucket.gd_bucket.bucket
rule {
apply_server_side_encryption_by_default {
kms_master_key_id = aws_kms_key.gd_key.arn
sse_algorithm = "aws:kms"
}
}
}
resource "aws_s3_bucket_versioning" "main" {
bucket = aws_s3_bucket.gd_bucket.id
versioning_configuration {
status = "Enabled"
}
}

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infrastructure/guardduty/main.tf Normal file
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terraform {
required_providers {
aws = {
source = "hashicorp/aws"
version = "~> 4.10.0"
}
}
backend "s3" {
bucket = "fleet-terraform-state20220408141538466600000002"
key = "root/guardduty/terraform.tfstate" # This should be set to account_alias/unique_key/terraform.tfstate
workspace_key_prefix = "root" # This should be set to the account alias
region = "us-east-2"
encrypt = true
kms_key_id = "9f98a443-ffd7-4dbe-a9c3-37df89b2e42a"
dynamodb_table = "tf-remote-state-lock"
role_arn = "arn:aws:iam::353365949058:role/terraform-root"
}
}
data "terraform_remote_state" "findings" {
backend = "s3"
config = {
bucket = "fleet-terraform-state20220408141538466600000002"
key = "root/guardduty/findings/terraform.tfstate" # This should be set to account_alias/unique_key/terraform.tfstate
workspace_key_prefix = "root" # This should be set to the account alias
region = "us-east-2"
encrypt = true
kms_key_id = "9f98a443-ffd7-4dbe-a9c3-37df89b2e42a"
dynamodb_table = "tf-remote-state-lock"
role_arn = "arn:aws:iam::353365949058:role/terraform-root"
}
}
provider "aws" {
region = terraform.workspace
default_tags {
tags = {
environment = "guardduty-${terraform.workspace}"
terraform = "https://github.com/fleetdm/fleet/tree/main/infrastructure/guardduty"
state = "s3://fleet-terraform-state20220408141538466600000002/root/guardduty/terraform.tfstate"
}
}
}
provider "aws" {
region = "us-east-2"
alias = "security"
assume_role {
role_arn = "arn:aws:iam::353365949058:role/admin"
}
default_tags {
tags = {
environment = "guardduty-${terraform.workspace}"
terraform = "https://github.com/fleetdm/fleet/tree/main/infrastructure/guardduty"
state = "s3://fleet-terraform-state20220408141538466600000002/root/guardduty/terraform.tfstate"
}
}
}
provider "aws" {
region = terraform.workspace
alias = "security-region"
assume_role {
role_arn = "arn:aws:iam::353365949058:role/admin"
}
default_tags {
tags = {
environment = "guardduty-${terraform.workspace}"
terraform = "https://github.com/fleetdm/fleet/tree/main/infrastructure/guardduty"
state = "s3://fleet-terraform-state20220408141538466600000002/root/guardduty/terraform.tfstate"
}
}
}
resource "aws_guardduty_organization_admin_account" "main" {
admin_account_id = "353365949058"
}
data "aws_guardduty_detector" "main" {
provider = aws.security-region
}
data "aws_s3_bucket" "findings" {
provider = aws.security
bucket = "fleet-guardduty-findings"
}
resource "aws_guardduty_publishing_destination" "main" {
provider = aws.security-region
detector_id = data.aws_guardduty_detector.main.id
destination_arn = data.aws_s3_bucket.findings.arn
kms_key_arn = data.terraform_remote_state.findings.outputs.kms_key.arn
}
resource "aws_guardduty_detector" "root" {}
data "aws_organizations_organization" "main" {}
resource "aws_guardduty_member" "root" {
provider = aws.security-region
account_id = aws_guardduty_detector.root.account_id
detector_id = data.aws_guardduty_detector.main.id
email = data.aws_organizations_organization.main.master_account_email
disable_email_notification = true
invite = true
}
resource "aws_guardduty_organization_configuration" "main" {
provider = aws.security-region
auto_enable = true
detector_id = data.aws_guardduty_detector.main.id
}
resource "aws_cloudwatch_event_rule" "console" {
name = "guardduty-${terraform.workspace}"
event_pattern = <<EOF
{
"source": ["aws.guardduty"],
"detail-type": ["GuardDuty Finding"]
}
EOF
}
resource "aws_cloudwatch_event_target" "main" {
rule = aws_cloudwatch_event_rule.console.name
target_id = "SendToSNS"
arn = aws_sns_topic.main.arn
}
resource "aws_sns_topic" "main" {
name = "guardduty-${terraform.workspace}"
}
resource "aws_sns_topic_policy" "main" {
arn = aws_sns_topic.main.arn
policy = data.aws_iam_policy_document.sns.json
}
data "aws_iam_policy_document" "sns" {
statement {
effect = "Allow"
actions = ["SNS:Publish"]
principals {
type = "Service"
identifiers = ["events.amazonaws.com"]
}
resources = [aws_sns_topic.main.arn]
}
}
resource "aws_cloudwatch_event_target" "main" {
arn = aws_lambda_function.main.arn
rule = aws_cloudwatch_event_rule.main.id
}
resource "aws_lambda_function" "main" {
# If the file is not in the current working directory you will need to include a
# path.module in the filename.
filename = "lambda_function_payload.zip"
function_name = "lambda_function_name"
role = aws_iam_role.iam_for_lambda.arn
handler = "index.test"
# The filebase64sha256() function is available in Terraform 0.11.12 and later
# For Terraform 0.11.11 and earlier, use the base64sha256() function and the file() function:
# source_code_hash = "${base64sha256(file("lambda_function_payload.zip"))}"
source_code_hash = filebase64sha256("lambda_function_payload.zip")
runtime = "python3.8"
}

22
infrastructure/guardduty/members/.terraform.lock.hcl Normal file
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# This file is maintained automatically by "terraform init".
# Manual edits may be lost in future updates.
provider "registry.terraform.io/hashicorp/aws" {
version = "4.10.0"
constraints = "~> 4.10.0"
hashes = [
"h1:S6xGPRL08YEuBdemiYZyIBf/YwM4OCvzVuaiuU6kLjc=",
"zh:0a2a7eabfeb7dbb17b7f82aff3fa2ba51e836c15e5be4f5468ea44bd1299b48d",
"zh:23409c7205d13d2d68b5528e1c49e0a0455d99bbfec61eb0201142beffaa81f7",
"zh:3adad2245d97816f3919778b52c58fb2de130938a3e9081358bfbb72ec478d9a",
"zh:5bf100aba6332f24b1ffeae7536d5d489bb907bf774a06b95f2183089eaf1a1a",
"zh:63c3a24c0c229a1d3390e6ea2454ba4d8ace9b94e086bee1dbdcf665ae969e15",
"zh:6b76f5ffd920f0a750da3a4ff1d00eab18d9cd3731b009aae3df4135613bad4d",
"zh:8cd6b1e6b51e8e9bbe2944bb169f113d20d1d72d07ccd1b7b83f40b3c958233e",
"zh:9b12af85486a96aedd8d7984b0ff811a4b42e3d88dad1a3fb4c0b580d04fa425",
"zh:c5c31f58fb5bd6aebc6c662a4693640ec763cb3399cce0b592101cf24ece1625",
"zh:cc485410be43d6ad95d81b9e54cc4d2117aadf9bf5941165a9df26565d9cce42",
"zh:cebb89c74b6a3dc6780824b1d1e2a8d16a51e75679e14ad0b830d9f7da1a3a67",
"zh:e7dc427189cb491e1f96e295101964415cbf8630395ee51e396d2a811f365237",
]
}

16
infrastructure/guardduty/members/apply.sh Executable file
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#!/bin/bash
#last_account=492052055440
#start='false'
for account_id in $(aws organizations list-accounts | jq -r '.Accounts[] | .Id' | grep -v '831217569274' | grep -v '353365949058'); do
#if [[ ${last_account} == ${account_id} ]]; then
# start='true'
#fi
#if [[ $start == 'false' ]]; then
# continue
#fi
for region in $(aws ec2 describe-regions | jq -r '.Regions[] | .RegionName'); do
terraform workspace new "$account_id:$region"
terraform workspace select "$account_id:$region" || exit 1
terraform apply -auto-approve || exit 1
done
done

92
infrastructure/guardduty/members/main.tf Normal file
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terraform {
required_providers {
aws = {
source = "hashicorp/aws"
version = "~> 4.10.0"
}
}
backend "s3" {
bucket = "fleet-terraform-state20220408141538466600000002"
key = "root/guardduty/members/terraform.tfstate" # This should be set to account_alias/unique_key/terraform.tfstate
workspace_key_prefix = "root" # This should be set to the account alias
region = "us-east-2"
encrypt = true
kms_key_id = "9f98a443-ffd7-4dbe-a9c3-37df89b2e42a"
dynamodb_table = "tf-remote-state-lock"
role_arn = "arn:aws:iam::353365949058:role/terraform-root"
}
}
provider "aws" {
region = local.region
alias = "security"
assume_role {
role_arn = "arn:aws:iam::353365949058:role/admin"
}
default_tags {
tags = {
environment = "guardduty-${terraform.workspace}"
terraform = "https://github.com/fleetdm/fleet/tree/main/infrastructure/guardduty/members"
state = "s3://fleet-terraform-state20220408141538466600000002/root/guardduty/members/terraform.tfstate"
}
}
}
provider "aws" {
region = local.region
alias = "member"
assume_role {
role_arn = "arn:aws:iam::${local.account_id}:role/admin"
}
default_tags {
tags = {
environment = "guardduty-${terraform.workspace}"
terraform = "https://github.com/fleetdm/fleet/tree/main/infrastructure/guardduty/members"
state = "s3://fleet-terraform-state20220408141538466600000002/root/guardduty/members/terraform.tfstate"
}
}
}
provider "aws" {
region = local.region
alias = "root"
default_tags {
tags = {
environment = "guardduty-${terraform.workspace}"
terraform = "https://github.com/fleetdm/fleet/tree/main/infrastructure/guardduty/members"
state = "s3://fleet-terraform-state20220408141538466600000002/root/guardduty/members/terraform.tfstate"
}
}
}
locals {
account_id = split(":", terraform.workspace)[0]
region = split(":", terraform.workspace)[1]
accounts = { for i in data.aws_organizations_organization.main.non_master_accounts : i.id => i.email }
}
data "aws_organizations_organization" "main" {
provider = aws.root
}
resource "aws_guardduty_member" "member" {
provider = aws.security
account_id = aws_guardduty_detector.member.account_id
detector_id = data.aws_guardduty_detector.security.id
email = local.accounts[local.account_id]
disable_email_notification = true
invite = true
lifecycle {
ignore_changes = [email]
}
}
resource "aws_guardduty_detector" "member" {
provider = aws.member
}
data "aws_guardduty_detector" "security" {
provider = aws.security
}
data "aws_caller_identity" "security" {}