win_blackbyte_auto

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

Detects win.blackbyte.

rule win_blackbyte_auto {

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

    


    strings:
        $sequence_0 = { 3bc2 72f4 b8ffffffff 4883c420 }
                                                            
        $sequence_1 = { 3bc1 7573 488d4c2448 664585c0 740b }
                                                                        
        $sequence_2 = { 3bc7 7ce0 eb03 488bda }
                                                            
        $sequence_3 = { 493b6610 767b 4883ec38 48896c2430 488d6c2430 4889442440 49c7c500000000 }
                                                                                                
        $sequence_4 = { 4981f8c2000000 7554 4c8d4004 4c39c1 733a }
                                                                        
        $sequence_5 = { 3bc8 7708 41034908 3bc1 }
                                                            
        $sequence_6 = { 493b6610 0f86e5000000 4883ec58 48896c2450 488d6c2450 e8???????? }
                                                                                    
        $sequence_7 = { 4989c1 4989c8 488b842480000000 488b8c2488000000 4c894c2470 }
                                                                        
        $sequence_8 = { 498d3c11 833d????????00 750b 49890411 }
                                                            
        $sequence_9 = { 3bc2 7f2f 4c63d8 85c0 }
                                                            
        $sequence_10 = { 3bc1 7f4d 33c9 4c63c8 }
                                                            
        $sequence_11 = { 3bc7 7f38 33d2 4c63c8 }
                                                            
        $sequence_12 = { 4981f82d010000 7545 4c8d4001 4c39c1 }
                                                            
        $sequence_13 = { 498d3c0a 833d????????00 7506 4989040a eb05 e8???????? 488b8424d0000000 }
                                                                                                
        $sequence_14 = { 3bc8 757b 498bc8 6685d2 }
                                                            
        $sequence_15 = { 4989c1 4989d8 e9???????? 4889f0 }
                                                            
    condition:
        7 of them and filesize < 9435136
}

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

e3823b3d-d2ab-44e3-9f29-321d57fa7b5b

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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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