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Affect private profile

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: 2026-04-22T09:00:00Z · Confidence: medium

Hunt Hypothesis

The hypothesis is that an adversary is attempting to modify or access private user profiles to gain persistence or exfiltrate sensitive data. A SOC team should proactively hunt for this behavior in Azure Sentinel to identify potential lateral movement or data compromise efforts that may not be detected by traditional monitoring.

YARA Rule

rule win_files_operation {
    meta:
        author = "x0r"
        description = "Affect private profile"
    version = "0.1"
    strings:
        $f1 = "kernel32.dll" nocase
        $c1 = "WriteFile"
        $c2 = "SetFilePointer"
        $c3 = "WriteFile"
        $c4 = "ReadFile"
        $c5 = "DeleteFileA"
        $c6 = "CreateFileA"
        $c7 = "FindFirstFileA"
        $c8 = "MoveFileExA"
        $c9 = "FindClose"
        $c10 = "SetFileAttributesA"
        $c11 = "CopyFile"

    condition:
        $f1 and 3 of ($c*)
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

This rule contains 12 string patterns in its detection logic.

False Positive Guidance

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