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PKZIPSFXv11198990

yara LOW Yara-Rules
community
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: 2026-08-13T11:00:01Z · Confidence: medium

Hunt Hypothesis

This detection rule identifies potential malicious activity associated with the specific YARA signature PKZIPSFXv11198990, which targets known patterns in compressed archive files that may indicate stealthy data exfiltration or malware delivery. A proactive hunt is essential within Azure Sentinel to validate these low-severity alerts against broader context, ensuring that subtle threats embedded in ZIP archives are not overlooked before they escalate into significant incidents.

YARA Rule

rule PKZIPSFXv11198990
{
      meta:
		author="malware-lu"
strings:
		$a0 = { FC 2E 8C 0E [2] A1 [2] 8C CB 81 C3 [2] 3B C3 72 ?? 2D [2] 2D [2] FA BC [2] 8E D0 FB }

condition:
		$a0 at pe.entry_point
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

This rule contains 1 string patterns in its detection logic.

False Positive Guidance

Here are 5 specific false positive scenarios for the PKZIPSFXv11198990 detection rule, including suggested filters and exclusions tailored for an enterprise environment:

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