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apt_win_powerstar_persistence_batch

YARA detection rule by threatintel@volexity.com · See license at https://github.com/volexity/threat-intel/blob/main/LICENSE.txt

Detects the batch script used to persist PowerStar via Startup.

rule apt_win_powerstar_persistence_batch : CharmingKitten
{
    meta:
        author = "threatintel@volexity.com"
        date = "2023-05-16"
        description = "Detects the batch script used to persist PowerStar via Startup."
        hash1 = "9777f106ac62829cd3cfdbc156100fe892cfc4038f4c29a076e623dc40a60872"
        memory_suitable = 1
        license = "See license at https://github.com/volexity/threat-intel/blob/main/LICENSE.txt"

    strings:
        $s_1 = "e^c^h^o o^f^f"
        $s_2 = "powershertxdll.ertxdxe"
        $s_3 = "Get-Conrtxdtent -Prtxdath"
        $s_4 = "%appdata%\\Microsrtxdoft\\Windortxdws\\"
        $s_5 = "&(gcm i*x)$"
    condition:
        3 of them
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

7cf2a08b-6545-479b-9654-624c6d7c6374

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

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Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

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[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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