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Mirai Botnet TR-069 Worm - MIPS LSB

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: 2026-06-22T11:00:00Z · Confidence: medium

Hunt Hypothesis

The hypothesis is that the detection rule identifies potential Mirai Botnet TR-069 Worm activity targeting MIPS LSB devices by monitoring suspicious network traffic patterns associated with known C2 communication signatures. SOC teams should proactively hunt for this behavior in Azure Sentinel to identify and mitigate early-stage botnet infections before they spread to critical infrastructure.

YARA Rule

rule Mirai_MIPS_LSB : MALW
{
	meta:
		description = "Mirai Botnet TR-069 Worm - MIPS LSB" 
		author = "Felipe Molina / @felmoltor"
		date = "2016-12-04"
		version = "1.0" 
		MD5 = "bf650d39eb603d92973052ca80a4fdda"
		SHA1 = "03ecd3b49aa19589599c64e4e7a51206a592b4ef"
		ref1 = "http://www.theregister.co.uk/2016/11/28/router_flaw_exploited_in_massive_attack/"	
		ref2 = "https://isc.sans.edu/forums/diary/Port+7547+SOAP+Remote+Code+Execution+Attack+Against+DSL+Modems/21759" 
		ref3 = "https://krebsonsecurity.com/2016/11/new-mirai-worm-knocks-900k-germans-offline/"

	strings:
		$miname = "Myname--is:"
		$iptables1 = "busybox iptables -A INPUT -p tcp --destination-port 7547 -j DROP"
		$iptables2 = "busybox iptables -A INPUT -p tcp --destination-port 5555 -j DROP"
		$procnet = "/proc/net/tcp"

	condition:
		$miname and $iptables1 and $iptables2 and $procnet and
		hash.sha1(0,filesize) == "03ecd3b49aa19589599c64e4e7a51206a592b4ef"
}

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/malware/MALW_Mirai.yar