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Added an event for default rule "Detect outbound connections to common miner pool ports" #176

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Added an event for default rule "Detect outbound connections to common miner pool ports" #176

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58fd9bf
Added an event for default rule DetectOutboundConnectionsToCommonMine…
GLVSKiriti Mar 20, 2024
6fc5828
Fix: First look whether curl exists or not
GLVSKiriti Apr 3, 2024
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36 changes: 36 additions & 0 deletions events/syscall/detect_outbound_connections_to_common_miner_pool_ports.go
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// SPDX-License-Identifier: Apache-2.0
/*
Copyright (C) 2024 The Falco Authors.
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.
*/

package syscall

import (
"os/exec"

"github.com/falcosecurity/event-generator/events"
)

var _ = events.Register(
DetectOutboundConnectionsToCommonMinerPoolPorts,
events.WithDisabled(), // this rules is not included in falco_rules.yaml (stable rules), so disable the action
)

func DetectOutboundConnectionsToCommonMinerPoolPorts(h events.Helper) error {
curl, err := exec.LookPath("curl")
if err != nil {
h.Log().Warnf("Curl is needed to launch this action")
return err
}
cmd := exec.Command(curl, "http://mine.moneropool.com")
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Mmh is GETting this link safe?

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@GLVSKiriti GLVSKiriti Apr 3, 2024 •
edited
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Dont have an idea about that . I executed in my system 🙃

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cc @leogr

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Regardless if it's safe or not, this approach will make the action unpredictable (that worries me more).

Are there any alternative approaches that do not involve talking with external servers? 🤔

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@FedeDP @leogr if we are worrying about this

Mmh is GETting this link safe?

then why cant we follow this approach i.e, let us add any example domain in the rule here, which can be used for testing purposes. So after that we can curl example.com which triggers the rule and safe to GET the request. WDYT? about this approach. IMO instead of curling the suspicious domains we can do this which will be beneficial for testing purposes

- list: http_miner_domains
  items: [
    "ca.minexmr.com",
    "de.minexmr.com",
    "fr.minexmr.com",
    "mine.moneropool.com",
    "mine.xmrpool.net",
    "pool.minexmr.com",
    "sg.minexmr.com",
    "xmr.crypto-pool.fr",
    "example.com" # Not a miner domain but used for testing purposes in falco
  ]

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I'm sorry. I had lost track of this. Anyway, adding example.com to the list does not seem a viable option to me since it may increase false positives.

return cmd.Run()
}
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