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SimbiOZPoly21Extranger

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: 2026-09-02T11:00:00Z · Confidence: medium

Hunt Hypothesis

This detection identifies potential fileless or polyglot malware activity where adversaries execute suspicious code structures that may evade traditional signature-based defenses by leveraging the SimbiOZPoly21Extranger YARA rule. A proactive hunt in Azure Sentinel is essential to uncover early-stage lateral movement or command-and-control communications from these low-severity anomalies before they escalate into significant security incidents within the cloud environment.

YARA Rule

rule SimbiOZPoly21Extranger
{
      meta:
		author="malware-lu"
strings:
		$a0 = { 55 50 8B C4 83 C0 04 C7 00 [4] 58 C3 90 }

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 4 specific false positive scenarios for the SimbiOZPoly21Extranger detection rule, including targeted filters and exclusions:

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