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Chinese Hacktool Set - file IISPutScannesr.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: 2026-07-17T23:00:00Z · Confidence: medium

Hunt Hypothesis

This hunt hypothesis targets adversaries deploying the specific Chinese hacktool IISPutScannesr.exe to establish persistence or conduct reconnaissance within web server environments. Proactively hunting for this artifact in Azure Sentinel is critical because its low severity classification may cause it to be overlooked by automated alerts, allowing threat actors to maintain a stealthy foothold before escalating their activities.

YARA Rule

rule IISPutScannesr {
	meta:
		description = "Chinese Hacktool Set - file IISPutScannesr.exe"
		author = "Florian Roth"
		reference = "http://tools.zjqhr.com/"
		date = "2015-06-13"
		hash = "2dd8fee20df47fd4eed5a354817ce837752f6ae9"
	strings:
		$s1 = "yoda & M.o.D." ascii
		$s2 = "-> come.to/f2f **************" fullword ascii
	condition:
		uint16(0) == 0x5a4d and filesize < 500KB and all of them
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

This rule contains 2 string patterns in its detection logic.

References

False Positive Guidance

Here are 5 specific false positive scenarios for the Chinese Hacktool Set - file IISPutScannesr.exe detection rule, tailored for an enterprise environment:

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