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Detects Linux/Httpsd ARMv5

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: 2026-06-16T11:00:00Z · Confidence: medium

Hunt Hypothesis

The hypothesis is that the detection of Linux/Httpsd ARMv5 indicates potential adversary use of a compromised or malicious service running on a vulnerable ARM architecture. A SOC team should proactively hunt for this behavior to identify and mitigate potential lateral movement or persistence mechanisms in their Azure Sentinel environment.

YARA Rule

rule Linux_Httpsd_malware_ARM {
  
	meta:
		description = "Detects Linux/Httpsd ARMv5"
		date = "2017-12-31"

	strings:
		$hexsts01 = { f0 4f 2d e9 1e db 4d e2 ec d0 4d e2 01 40 a0 e1 } // main
		$hexsts02 = { f0 45 2d e9 0b db 4d e2 04 d0 4d e2 3c 01 9f e5 } // self-rclocal
		$hexsts03 = { f0 45 2d e9 01 db 4d e2 04 d0 4d e2 bc 01 9f e5 } // copy-self

	condition:
		all of them
        	and is__elf
		and is__LinuxHttpsdStrings
		and filesize < 200KB 
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

This rule contains 3 string patterns in its detection logic.

False Positive Guidance

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