win_badaudio_auto

YARA detection rule by Felix Bilstein - yara-signator at cocacoding dot com

Detects win.badaudio.

rule win_badaudio_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.badaudio."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.badaudio"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    


    strings:
        $sequence_0 = { 51 50 e8???????? 83c40c 31db 85c0 0f94c3 }
                                                                                                
        $sequence_1 = { 80f136 884c2440 345c 880424 }
                                                            
        $sequence_2 = { e8???????? 8b7d08 c6470c00 807de000 0f8447ffffff 8b45dc }
                                                                                    
        $sequence_3 = { 8d7110 83c0f0 8b1a 8b5204 8945cc 8975c8 894db8 }
                                                                                                
        $sequence_4 = { 89c1 c1c11e 89c6 c1c613 31ce c1c00a 31f0 }
                                                                                                
        $sequence_5 = { 7226 83f83f 7714 90 8d4801 894e28 c644062c00 }
                                                                                                
        $sequence_6 = { 51 50 e8???????? 83c40c 8b4614 2b4610 034604 }
                                                                                                
        $sequence_7 = { 3a540803 7540 83c104 83f920 75ce }
                                                                        
        $sequence_8 = { 328fe7000000 884e07 8a442402 3287e8000000 884608 8a442405 3287e9000000 }
                                                                                                
        $sequence_9 = { e8???????? 83c404 50 89e2 8b0e c70600000000 }
                                                                                    
    condition:
        7 of them and filesize < 1420288
}

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

80e07eae-1bb7-4354-a345-7e30dc6f4920

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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

[[ reason ]]

What does this mean?

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.

[[ reason ]]

What do these messages mean?

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

[[ currentRule.title ]]

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