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Sniff Lan network traffic

yara LOW Yara-Rules
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This rule was pulled from an open-source repository and enriched with AI. Validate in a test environment before deploying to production.
View original rule at Yara-Rules →
Retrieved: 2026-04-22T09:00:00Z · Confidence: medium

Hunt Hypothesis

Adversaries may use LAN sniffing to capture sensitive data transmitted over the network, indicating potential data exfiltration or reconnaissance. SOC teams should proactively hunt for this behavior in Azure Sentinel to identify and mitigate early-stage network-based threats before they escalate.

YARA Rule

rule sniff_lan {
    meta:
        author = "x0r"
        description = "Sniff Lan network traffic"
	version = "0.1"
    strings:
        $f1 = "packet.dll" nocase
        $f2 = "npf.sys" nocase
        $f3 = "wpcap.dll" nocase
        $f4 = "winpcap.dll" nocase
    condition:
        any of them
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

This rule contains 4 string patterns in its detection logic.

False Positive Guidance

Original source: https://github.com/Yara-Rules/rules/blob/main/capabilities/capabilities.yar