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Chinese Hacktool Set - file DUBrute.exe

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: 2026-07-15T11:00:00Z · Confidence: medium

Hunt Hypothesis

This hunt targets adversaries deploying the DUBrute.exe tool from the Chinese Hacktool set to conduct brute-force credential attacks or reconnaissance within the Azure environment. Proactively hunting for this specific artifact allows the SOC team to identify early-stage lateral movement and potential supply chain compromises before they escalate into critical security incidents.

YARA Rule

rule DUBrute_DUBrute {
	meta:
		description = "Chinese Hacktool Set - file DUBrute.exe"
		author = "Florian Roth"
		reference = "http://tools.zjqhr.com/"
		date = "2015-06-13"
		hash = "8aaae91791bf782c92b97c6e1b0f78fb2a9f3e65"
	strings:
		$s1 = "IP - %d; Login - %d; Password - %d; Combination - %d" fullword ascii
		$s2 = "IP - 0; Login - 0; Password - 0; Combination - 0" fullword ascii
		$s3 = "Create %d IP@Loginl;Password" fullword ascii
		$s4 = "UBrute.com" fullword ascii
	condition:
		uint16(0) == 0x5a4d and filesize < 1020KB and all of them
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

This rule contains 4 string patterns in its detection logic.

References

False Positive Guidance

Here are 4 specific false positive scenarios for the Chinese Hacktool Set - file DUBrute.exe detection rule, including suggested filters and exclusions:

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