Detection rules › Sigma
Potential Network Sniffing Activity Using Network Tools
Detects potential network sniffing via use of network tools such as "tshark", "windump". 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 |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 1 | Process creation |
| Security-Auditing | Event ID 4688 | A new process has been created. |
Rule body yaml
title: Potential Network Sniffing Activity Using Network Tools
id: ba1f7802-adc7-48b4-9ecb-81e227fddfd5
status: test
description: |
Detects potential network sniffing via use of network tools such as "tshark", "windump".
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, Nasreddine Bencherchali (Nextron Systems)
date: 2019-10-21
modified: 2023-02-20
tags:
- attack.credential-access
- attack.discovery
- attack.t1040
logsource:
category: process_creation
product: windows
detection:
selection_tshark:
Image|endswith: '\tshark.exe'
CommandLine|contains: '-i'
selection_windump:
Image|endswith: '\windump.exe'
condition: 1 of selection_*
falsepositives:
- Legitimate administration activity to troubleshoot network issues
level: medium
Stages and Predicates
Stage 0: condition
1 of selection_*Stage 1: selection_tshark
selection_tshark:
Image|endswith: '\tshark.exe'
CommandLine|contains: '-i'
Stage 2: selection_windump
selection_windump:
Image|endswith: '\windump.exe'
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 |
|---|---|---|
CommandLine | match |
|
Image | ends_with |
|