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Trojan Win32 Plabit

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: 2026-06-02T11:00:00Z · Confidence: medium

Hunt Hypothesis

The Trojan Win32 Plabit is likely being used by adversaries to establish persistence and exfiltrate data through covert network communication. SOC teams should proactively hunt for this behavior in Azure Sentinel to identify and mitigate potential long-term compromise and data leakage.

YARA Rule

rule Trojan_Win32_Plabit
{

    meta:
        author = "Microsoft" description = "Installer component" sample_sha1 = "6d1169775a552230302131f9385135d385efd166" activity_group = "Platinum" version = "1.0"
        last_modified = "2016-04-12"
    
    strings:
        $str1 = {4b D3 91 49 A1 80 91 42 83 B6 33 28 36 6B 90 97}
        $str2 = "GetInstanceW"
        $str3 = {8B D0 83 E2 1F 8A 14 0A 30 14 30 40 3B 44 24 04 72 EE}
    
    condition:
        $str1 and $str2 and $str3
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

This rule contains 3 string patterns in its detection logic.

False Positive Guidance

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