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Variant of the JPin backdoor

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: 2026-06-01T23:00:00Z · Confidence: medium

Hunt Hypothesis

The detection identifies potential Variant of the JPin backdoor activity, which may indicate unauthorized remote access or persistence mechanisms. SOC teams should proactively hunt for this behavior to detect and mitigate early-stage compromise in their Azure Sentinel environment.

YARA Rule

rule Trojan_Win32_Plaplex 
{

    meta:
        author = "Microsoft"
        description = "Variant of the JPin backdoor"
        original_sample_sha1 = "ca3bda30a3cdc15afb78e54fa1bbb9300d268d66"
        unpacked_sample_sha1 = "2fe3c80e98bbb0cf5a0c4da286cd48ec78130a24"
        activity_group = "Platinum"
        version = "1.0"
        last_modified = "2016-04-12"

    strings:
        $class_name1 = "AVCObfuscation"
        $class_name2 = "AVCSetiriControl"
    
    condition:
        $class_name1 and $class_name2
}

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/APT_Platinum.yar