win_nightclub_auto

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

Detects win.nightclub.

rule win_nightclub_auto {

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

    


    strings:
        $sequence_0 = { 8d4c2420 c644241b00 ff15???????? c744243800000000 8b4d0c 8b7d08 }
                                                                                    
        $sequence_1 = { e8???????? 8d8d88feffff ff15???????? 8d8d20ffffff ff15???????? 8b45c4 85c0 }
                                                                                                
        $sequence_2 = { 8b4d08 8b510c 83ec08 53 56 }
                                                                        
        $sequence_3 = { c645fc06 ff15???????? 8d4f64 c645fc05 ff15???????? 8d4f54 c645fc04 }
                                                                                                
        $sequence_4 = { ff15???????? 83c404 68???????? 8d953cfeffff c7853cfeffff704e0110 c78558feffff65000000 }
                                                                                    
        $sequence_5 = { ff15???????? 8bc6 8b4c2430 64890d00000000 59 }
                                                                        
        $sequence_6 = { 8d957cffffff c645fc04 e8???????? c645fc06 8b45c8 8b3d???????? bb???????? }
                                                                                                
        $sequence_7 = { 6a01 6a02 8d8d20ffffff c745fc03000000 ff15???????? 8d8d20ffffff 68???????? }
                                                                                                
        $sequence_8 = { 33c0 8bff 83b878a7011001 740d 83c014 41 }
                                                                                    
        $sequence_9 = { 42 52 8b5508 52 8d7104 8bc7 }
                                                                                    
    condition:
        7 of them and filesize < 247808
}

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

51351aa4-51b6-4d4c-933e-ddf9f69cea7a

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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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