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qti certificate

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: 2026-06-26T11:00:00Z · Confidence: medium

Hunt Hypothesis

The qti_certificate rule detects potential adversary behavior involving the use of custom or malicious certificates, which may be used to establish secure communication channels for command and control. SOC teams should proactively hunt for this behavior in Azure Sentinel to identify and mitigate early-stage threats that could evade traditional detection methods.

YARA Rule

rule qti_certificate
{
    meta:
        Author      = "Fireeye Labs"
        Date        = "2014/11/03" 
        Description = "detects binaries signed with the QTI International Inc certificate"
        Reference   = "https://www.fireeye.com/blog/threat-research/2014/11/operation-poisoned-handover-unveiling-ties-between-apt-activity-in-hong-kongs-pro-democracy-movement.html"

    strings:
        $cn = "QTI International Inc"
        $serial = { 2e df b9 fd cf a0 0c cb 5a b0 09 ee 3a db 97 b9 }

    condition:
        $cn and $serial
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

This rule contains 2 string patterns in its detection logic.

False Positive Guidance

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