← Back to SOC feed Coverage →

Chinese Hacktool Set - file pr.exe

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: 2026-07-17T11:00:00Z · Confidence: medium

Hunt Hypothesis

This hypothesis posits that adversaries are utilizing the pr.exe artifact from a known Chinese hacktool suite to establish persistence or conduct reconnaissance within the environment. The SOC team should proactively hunt for this specific file in Azure Sentinel because its low-severity classification may allow it to bypass initial alerting thresholds, enabling stealthy lateral movement before more critical indicators emerge.

YARA Rule

rule GoodToolset_pr {
	meta:
		description = "Chinese Hacktool Set - file pr.exe"
		author = "Florian Roth"
		reference = "http://tools.zjqhr.com/"
		date = "2015-06-13"
		hash = "f6676daf3292cff59ef15ed109c2d408369e8ac8"
	strings:
		$s1 = "-->Got WMI process Pid: %d " ascii
		$s2 = "-->This exploit gives you a Local System shell " ascii
		$s3 = "wmiprvse.exe" fullword ascii
		$s4 = "Try the first %d time" fullword ascii
		$s5 = "-->Build&&Change By p " ascii
		$s6 = "root\\MicrosoftIISv2" fullword wide
	condition:
		uint16(0) == 0x5a4d and filesize < 200KB and all of them
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

This rule contains 6 string patterns in its detection logic.

References

False Positive Guidance

Here are 5 specific false positive scenarios for the Chinese Hacktool Set - pr.exe detection rule in an enterprise environment, along with suggested filters or exclusions:

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