win_koadic_auto

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

Detects win.koadic.

rule win_koadic_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.koadic."
        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.koadic"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    


    strings:
        $sequence_0 = { 8a08 40 84c9 75f9 2bc2 b940000000 2bc8 }
                                                                                                
        $sequence_1 = { 7510 84db 7420 ff4c2414 741a 8b44241c ebd4 }
                                                                                                
        $sequence_2 = { ff742404 8b5c240c 83c320 53 e8???????? ff35???????? ff35???????? }
                                                                                                
        $sequence_3 = { 85f6 7472 668b2c19 663b2c1a 7f1a 8908 8b4c2410 }
                                                                                                
        $sequence_4 = { 5e 5b 5d c21c00 33c0 50 }
                                                                                    
        $sequence_5 = { 83ec14 53 55 56 8b742428 8a06 }
                                                                                    
        $sequence_6 = { 8b4c2410 89542428 4e 85ff 75be 85f6 7416 }
                                                                                                
        $sequence_7 = { e8???????? 395d0c 7437 ff7510 }
                                                            
        $sequence_8 = { 85c0 740b 8bff 48 8b09 894c2424 75f7 }
                                                                                                
        $sequence_9 = { e9???????? 8b442408 56 8b30 8b46f8 83ee18 57 }
                                                                                                
    condition:
        7 of them and filesize < 180224
}

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

4ce40662-5606-4a90-b90f-0a18ae6d36ca

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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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