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IOC looks for events associated with the KORPLUG Backdoor linked to the recent operation greedy wonk activity.

yara LOW Yara-Rules
backdoorcommunity
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: 2026-06-17T23:00:00Z · Confidence: medium

Hunt Hypothesis

The hypothesis is that the detection rule identifies potential KORPLUG Backdoor activity linked to the recent “greedy wonk” operation by monitoring suspicious event logs associated with known IOC indicators. SOC teams should proactively hunt for this behavior in Azure Sentinel to detect early-stage compromise and mitigate the impact of advanced persistent threats.

YARA Rule

rule Korplug
{ 
	meta:
		maltype = "Korplug Backdoor"
        author = "https://github.com/reed1713"
		reference = "http://www.symantec.com/connect/blogs/new-sample-backdoorkorplug-signed-stolen-certificate"
		description = "IOC looks for events associated with the KORPLUG Backdoor linked to the recent operation greedy wonk activity."
		
	strings:
		$type="Microsoft-Windows-Security-Auditing"
		$eventid="4688"
		$data="ProgramData\\RasTls\\RasTls.exe"

		$type1="Microsoft-Windows-Security-Auditing"
		$eventid1="4688"
		$data1="ProgramData\\RasTls\\rundll32.exe"

		$type2="Microsoft-Windows-Security-Auditing"
		$eventid2="4688"
		$data2="ProgramData\\RasTls\\svchost.exe"
	condition:
		all of them
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

This rule contains 9 string patterns in its detection logic.

References

False Positive Guidance

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