win_dadjoke_auto

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

Detects win.dadjoke.

rule win_dadjoke_auto {

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

    


    strings:
        $sequence_0 = { 56 57 6800081000 6a00 }
                                                            
        $sequence_1 = { 8855f4 8345b801 807df400 75ed 8b7db8 8bb568ffffff }
                                                                                    
        $sequence_2 = { 8b4df0 e8???????? 8945e8 837df810 732a }
                                                                        
        $sequence_3 = { 8945f8 837df800 740a ff15???????? 32c0 eb02 b001 }
                                                                                                
        $sequence_4 = { c745fcffffffff 8d4da8 e8???????? 8b4594 e9???????? 8d4dc0 }
                                                                                    
        $sequence_5 = { 8b4dfc 81c104010000 394d10 722e 33d2 8b4508 }
                                                                                    
        $sequence_6 = { 8b5508 52 6a00 6a00 ff15???????? 6808020000 6a00 }
                                                                                                
        $sequence_7 = { 7504 32c0 eb24 8b4508 8b08 51 ff15???????? }
                                                                                                
        $sequence_8 = { 5e c3 8bff 55 8bec 83ec10 33c0 }
                                                                                                
        $sequence_9 = { 0f94c1 8bc1 c3 a1???????? }
                                                            
        $sequence_10 = { 6a02 ff15???????? 85c0 7417 b920000000 }
                                                                        
        $sequence_11 = { e8???????? c3 6a04 e8???????? 59 c3 6a0c }
                                                                                                
        $sequence_12 = { 3bd0 72f4 80fb5c 75af }
                                                            
        $sequence_13 = { 8d4901 88440d8f 84c0 75ef b82f000000 }
                                                                        
        $sequence_14 = { 51 e8???????? 8bf0 83c404 85f6 740d }
                                                                                    
        $sequence_15 = { 50 8b08 ff511c 8b85e4faffff }
                                                            
        $sequence_16 = { 33f6 85c9 741d 8d4588 50 6800100000 8d041e }
                                                                                                
        $sequence_17 = { c7458c00000000 ff15???????? 50 e8???????? 83c404 bf3e000000 }
                                                                                    
        $sequence_18 = { ff15???????? 8bf0 8975f4 85f6 7431 }
                                                                        
        $sequence_19 = { 6a00 57 ff15???????? 85c0 7524 8b35???????? }
                                                                                    
        $sequence_20 = { 50 56 68???????? 53 ff15???????? 83c410 57 }
                                                                                                
        $sequence_21 = { 00f8 e401 00ec e401 00dc e401 00ca }
                                                                                                
        $sequence_22 = { 0f8241ffffff 68???????? e8???????? 8b75fc 83c404 }
                                                                        
    condition:
        7 of them and filesize < 344064
}

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

4bbd9abe-8c1a-4584-8e1c-7444304d2a88

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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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