Detection rules › Sigma
Network Sniffing - Linux
Network sniffing refers to using the network interface on a system to monitor or capture information sent over a wired or wireless connection. An adversary may place a network interface into promiscuous mode to passively access data in transit over the network, or use span ports to capture a larger amount of data.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Credential Access | T1040 Network Sniffing |
| Discovery | T1040 Network Sniffing |
Rule body yaml
title: Network Sniffing - Linux
id: f4d3748a-65d1-4806-bd23-e25728081d01
status: test
description: |
Network sniffing refers to using the network interface on a system to monitor or capture information sent over a wired or wireless connection.
An adversary may place a network interface into promiscuous mode to passively access data in transit over the network, or use span ports to capture a larger amount of data.
references:
- https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1040/T1040.md
author: Timur Zinniatullin, oscd.community
date: 2019-10-21
modified: 2022-12-18
tags:
- attack.credential-access
- attack.discovery
- attack.t1040
logsource:
product: linux
service: auditd
detection:
selection_1:
type: 'execve'
a0: 'tcpdump'
a1: '-c'
a3|contains: '-i'
selection_2:
type: 'execve'
a0: 'tshark'
a1: '-c'
a3: '-i'
condition: 1 of selection_*
falsepositives:
- Legitimate administrator or user uses network sniffing tool for legitimate reasons.
level: low
Stages and Predicates
Stage 0: condition
1 of selection_*Stage 1: selection_1
selection_1:
type: 'execve'
a0: 'tcpdump'
a1: '-c'
a3|contains: '-i'
Stage 2: selection_2
selection_2:
type: 'execve'
a0: 'tshark'
a1: '-c'
a3: '-i'
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.