Gateway Network
Overview
Cloudflare is a global network designed to make everything you connect to the Internet secure, private, fast, and reliable.
In this documentation, you will learn how to collect and send Gateway Network logs to SEKOIA.IO.
Related Built-in Rules
Benefit from SEKOIA.IO built-in rules and upgrade Cloudflare Gateway Network with the following detection capabilities out-of-the-box.
SEKOIA.IO x Cloudflare Gateway Network on ATT&CK Navigator
Burp Suite Tool Detected
Burp Suite is a cybersecurity tool. When used as a proxy service, its purpose is to intercept packets and modify them to send them to the server. Burp Collaborator is a network service that Burp Suite uses to help discover many kinds of vulnerabilities (vulnerabilities scanner)
- Effort: intermediate
SEKOIA.IO Intelligence Feed
Detect threats based on indicators of compromise (IOCs) collected by SEKOIA's Threat and Detection Research team.
- Effort: elementary
Telegram Bot API Request
Detects suspicious DNS queries to api.telegram.org used by Telegram Bots of any kind
- Effort: advanced
Event Categories
The following table lists the data source offered by this integration.
Data Source | Description |
---|---|
Network device logs |
The network is logged by cloudflare gateway |
Network protocol analysis |
The network is inspected by cloudflare gateway |
In details, the following table denotes the type of events produced by this integration.
Name | Values |
---|---|
Kind | event |
Category | network |
Type | `` |
Event Samples
Find below few samples of events and how they are normalized by SEKOIA.IO.
{
"message": "{\"AccountID\":\"1d1e650b3385b95db72bba7cfb1287e9\",\"Action\":\"allowedOnNoRuleMatch\",\"Datetime\":\"2023-02-24T16:33:05Z\",\"DestinationIP\":\"104.244.42.193\",\"DestinationPort\":443,\"DeviceID\":\"\",\"DeviceName\":\"\",\"Email\":\"\",\"OverrideIP\":\"\",\"OverridePort\":0,\"PolicyID\":\"\",\"PolicyName\":\"\",\"SNI\":\"www.twitter.com\",\"SessionID\":\"1725de7a2d0000215517735400000001\",\"SourceIP\":\"15.188.186.81\",\"SourcePort\":34080,\"Transport\":\"tcp\",\"UserID\":\"\"}",
"event": {
"action": "allowedOnNoRuleMatch",
"category": [
"network"
],
"dataset": "gateway_network",
"kind": "event",
"type": [
"allowed"
]
},
"@timestamp": "2023-02-24T16:33:05Z",
"cloud": {
"account": {
"id": "1d1e650b3385b95db72bba7cfb1287e9"
}
},
"destination": {
"domain": "www.twitter.com",
"ip": "104.244.42.193",
"address": "104.244.42.193",
"port": 443
},
"observer": {
"type": "proxy",
"vendor": "Cloudflare"
},
"network": {
"transport": "tcp"
},
"source": {
"ip": "15.188.186.81",
"port": 34080,
"address": "15.188.186.81"
},
"tls": {
"client": {
"server_name": "www.twitter.com"
}
},
"cloudflare": {
"OverridePort": 0,
"SessionID": "1725de7a2d0000215517735400000001"
},
"related": {
"hosts": [
"www.twitter.com"
],
"ip": [
"104.244.42.193",
"15.188.186.81"
]
}
}
{
"message": "{\"AccountID\":\"1d1e650b3385b95db72bba7cfb1287e9\",\"Action\":\"allowedOnNoRuleMatch\",\"Datetime\":\"2023-05-02T16:24:20Z\",\"DestinationIP\":\"104.18.5.35\",\"DestinationPort\":443,\"DeviceID\":\"b72ac397-e5c3-913e-11ed-03face9f2b6b\",\"DeviceName\":\"DESKTOP-ABCDEF\",\"Email\":\"john.doe@test.com\",\"OverrideIP\":\"\",\"OverridePort\":0,\"PolicyID\":\"\",\"PolicyName\":\"\",\"SNI\":\"commandandcontrolandbotnet.testcategory.com\",\"SessionID\":\"187ee08b7d00003d0d8e47f400000001\",\"SourceIP\":\"15.188.186.81\",\"SourceInternalIP\":\"\",\"SourcePort\":54945,\"Transport\":\"tcp\",\"UserID\":\"2c46cdd9-92e3-5e5f-b3cf-67965d7c33e3\"}",
"event": {
"action": "allowedOnNoRuleMatch",
"category": [
"network"
],
"dataset": "gateway_network",
"kind": "event",
"type": [
"allowed"
]
},
"@timestamp": "2023-05-02T16:24:20Z",
"cloud": {
"account": {
"id": "1d1e650b3385b95db72bba7cfb1287e9"
}
},
"destination": {
"domain": "commandandcontrolandbotnet.testcategory.com",
"ip": "104.18.5.35",
"address": "104.18.5.35",
"port": 443
},
"device": {
"id": "b72ac397-e5c3-913e-11ed-03face9f2b6b"
},
"host": {
"hostname": "DESKTOP-ABCDEF",
"name": "DESKTOP-ABCDEF"
},
"observer": {
"type": "proxy",
"vendor": "Cloudflare"
},
"network": {
"transport": "tcp"
},
"user": {
"email": "john.doe@test.com",
"id": "2c46cdd9-92e3-5e5f-b3cf-67965d7c33e3"
},
"source": {
"ip": "15.188.186.81",
"port": 54945,
"address": "15.188.186.81"
},
"tls": {
"client": {
"server_name": "commandandcontrolandbotnet.testcategory.com"
}
},
"cloudflare": {
"OverridePort": 0,
"SessionID": "187ee08b7d00003d0d8e47f400000001"
},
"related": {
"hosts": [
"DESKTOP-ABCDEF",
"commandandcontrolandbotnet.testcategory.com"
],
"ip": [
"104.18.5.35",
"15.188.186.81"
]
}
}
{
"message": "{\"AccountID\":\"1d1e650b3385b95db72bba7cfb1287e9\",\"Action\":\"allowedOnNoRuleMatch\",\"Datetime\":\"2023-02-24T16:33:05Z\",\"DestinationIP\":\"104.244.42.193\",\"DestinationPort\":443,\"DeviceID\":\"\",\"DeviceName\":\"\",\"Email\":\"\",\"OverrideIP\":\"\",\"OverridePort\":0,\"PolicyID\":\"\",\"PolicyName\":\"\",\"SNI\":\"\",\"SessionID\":\"1725de7a2d0000215517735400000001\",\"SourceIP\":\"15.188.186.81\",\"SourcePort\":34080,\"Transport\":\"tcp\",\"UserID\":\"\"}",
"event": {
"action": "allowedOnNoRuleMatch",
"category": [
"network"
],
"dataset": "gateway_network",
"kind": "event",
"type": [
"allowed"
]
},
"@timestamp": "2023-02-24T16:33:05Z",
"cloud": {
"account": {
"id": "1d1e650b3385b95db72bba7cfb1287e9"
}
},
"destination": {
"ip": "104.244.42.193",
"address": "104.244.42.193",
"port": 443
},
"observer": {
"type": "proxy",
"vendor": "Cloudflare"
},
"network": {
"transport": "tcp"
},
"source": {
"ip": "15.188.186.81",
"port": 34080,
"address": "15.188.186.81"
},
"cloudflare": {
"OverridePort": 0,
"SessionID": "1725de7a2d0000215517735400000001"
},
"related": {
"ip": [
"104.244.42.193",
"15.188.186.81"
]
}
}
Extracted Fields
The following table lists the fields that are extracted, normalized under the ECS format, analyzed and indexed by the parser. It should be noted that infered fields are not listed.
Name | Type | Description |
---|---|---|
@timestamp |
date |
Date/time when the event originated. |
cloud.account.id |
keyword |
The cloud account or organization id. |
cloudflare.InternalSourceIP |
keyword |
Local LAN IP of the device. Only available when connected via a GRE/IPsec tunnel on-ramp. |
cloudflare.OverrideIP |
keyword |
Overriden IP of the network session, if any. |
cloudflare.OverridePort |
number |
Overriden port of the network session, if any. |
cloudflare.PolicyID |
keyword |
Identifier of the policy/rule that was applied, if any. |
cloudflare.PolicyName |
keyword |
The name of the gateway policy applied to the request, if any. |
cloudflare.SessionID |
keyword |
The session identifier of this network session. |
destination.address |
keyword |
Destination network address. |
destination.domain |
keyword |
The domain name of the destination. |
destination.ip |
ip |
IP address of the destination. |
destination.port |
long |
Port of the destination. |
event.action |
keyword |
The action captured by the event. |
event.category |
keyword |
Event category. The second categorization field in the hierarchy. |
event.dataset |
keyword |
Name of the dataset. |
event.kind |
keyword |
The kind of the event. The highest categorization field in the hierarchy. |
event.type |
keyword |
Event type. The third categorization field in the hierarchy. |
host.hostname |
keyword |
Hostname of the host. |
network.transport |
keyword |
Protocol Name corresponding to the field iana_number . |
observer.type |
keyword |
The type of the observer the data is coming from. |
observer.vendor |
keyword |
Vendor name of the observer. |
source.ip |
ip |
IP address of the source. |
source.port |
long |
Port of the source. |
tls.client.server_name |
keyword |
Hostname the client is trying to connect to. Also called the SNI. |
user.email |
keyword |
User email address. |
user.id |
keyword |
Unique identifier of the user. |
Configuration
Create the intake on SEKOIA.IO
Go to the intake page and create a new intake from the format Cloudflare.
Configure events forwarding on Cloudflare
Retrieve necessary information
First, you will have to retrieve configuration information. Connect to Cloudflare Console to collect the following :
-
Cloudflare API Token
- Go to
My Profile
, then on the left panel, click onAPI Tokens
. - Click on the
Create Token
button and select theCreate Custom Token
entry. - Give a name to your token and set the following permissions:
Scope Group Level Account Account Analytics Read Account Logs Read Account Logs Edit Zone Logs Read Zone Logs Edit - If you want zerotrust logs you should also add:
Scope Group Level Account Zero Trust Read - Go to
-
Cloudflare Zone ID :
- This information is specific to a Website.
- On the left panel, click on
Websites
and select the Website you want. - On the right panel, there is an
API
section where you can retrieve theZone ID
.
Create a Logpush job
Configure a Logpush job with the following destination:
https://intake.sekoia.io/plain/batch?header_X-SEKOIAIO-INTAKE-KEY=<YOUR_INTAKE_KEY>
To do so, you can manage Logpush with cURL:
$ curl -X POST https://api.cloudflare.com/client/v4/accounts/<CLOUDFLARE_ACCOUNT_ID>/logpush/jobs \
-H "Authorization: Bearer <CLOUDFLARE_API_TOKEN>" \
-H "Content-Type: application/json" \
--data '{
"dataset": "gateway_network",
"enabled": true,
"max_upload_bytes": 5000000,
"max_upload_records": 1000,
"logpull_options":"fields=AccountID,Action,Datetime,DestinationIP,DestinationPort,DeviceID,DeviceName,Email,OverrideIP,OverridePort,PolicyID,PolicyName,SNI,SessionID,SourceIP,SourceInternalIP,SourcePort,Transport,UserID×tamps=rfc3339",
"destination_conf": "https://intake.sekoia.io/plain/batch?header_X-SEKOIAIO-INTAKE-KEY=<YOUR_INTAKE_KEY>"
}' # (1)
- will return
{ "errors": [], "messages": [], "result": { "id": <ID>, "dataset": "gateway_network", "frequency": "high", "kind": "", "max_upload_bytes": 5000000, "max_upload_records": 1000, "enabled": true, "name": null, "logpull_options": "fields=<LIST_OF_FIELDS>", "destination_conf": "https://intake.sekoia.io/plain/batch?header_X-SEKOIAIO-INTAKE-KEY=<YOUR_INTAKE_KEY>", "last_complete": null, "last_error": null, "error_message": null, "time_created": "<TIMESTAMP>" }, "success": true }
Important
Replace :
<YOUR_INTAKE_KEY>
with the Intake key you generated in the Create the intake on SEKOIA.IO step.<CLOUDFLARE_ACCOUNT_ID>
with the ACCOUNT_ID found on the overview page<CLOUDFLARE_API_TOKEN>
with the API Token you generated
Useful Cloudflare API endpoints
On their documentation, Cloudflare provides a list API endpoints you can use. Find below some useful endpoints:
https://api.cloudflare.com/client/v4/accounts/<ACCOUNT_ID>/logpush/jobs/<JOB_ID>
to verify the job you previously created is correct (you need to specify theJOB_ID
)https://api.cloudflare.com/client/v4/accounts/<ACCOUNT_ID>/logpush/datasets/<DATASET>/jobs
to get all the jobs for a specific dataset (dns_log
,firewalls_events
orhttp_requests
in our case)https://api.cloudflare.com/client/v4/accounts/<ACCOUNT_ID>/logpush/jobs/<JOB_ID>
to update a job if you noticed a mistake after the creation of the job (wrong fields, wrong SEKOIA API Key...)