Detection rules › Sigma
Network Connection Initiated To BTunnels Domains
Detects network connections to BTunnels domains initiated by a process on the system. Attackers can abuse that feature to establish a reverse shell or persistence on a machine.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Command & Control | T1572 Protocol Tunneling |
| Exfiltration | T1567 Exfiltration Over Web Service |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 3 | Network connection |
Rule body yaml
title: Network Connection Initiated To BTunnels Domains
id: 9e02c8ec-02b9-43e8-81eb-34a475ba7965
status: test
description: |
Detects network connections to BTunnels domains initiated by a process on the system.
Attackers can abuse that feature to establish a reverse shell or persistence on a machine.
references:
- https://defr0ggy.github.io/research/Utilizing-BTunnel-For-Data-Exfiltration/
author: Kamran Saifullah
date: 2024-09-13
tags:
- attack.exfiltration
- attack.command-and-control
- attack.t1567
- attack.t1572
logsource:
category: network_connection
product: windows
detection:
selection:
Initiated: 'true'
DestinationHostname|endswith: '.btunnel.co.in'
condition: selection
falsepositives:
- Legitimate use of BTunnels will also trigger this.
level: medium
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
Initiated: 'true'
DestinationHostname|endswith: '.btunnel.co.in'
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
DestinationHostname | ends_with |
|
Initiated | eq |
|