win_brambul_auto

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

Detects win.brambul.

rule win_brambul_auto {

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

    


    strings:
        $sequence_0 = { 7e45 8b5c241c 8b6c2418 ff15???????? 2b442410 3d60ea0000 7734 }
                                                                                                
        $sequence_1 = { 8dbc37604bbbf6 8bf7 c1ee10 c1e710 0bf7 }
                                                                        
        $sequence_2 = { 8807 8b4d88 47 46 4a }
                                                                        
        $sequence_3 = { 8bd7 33d1 035054 8d9c13f87ca21f 8bd3 c1ea10 }
                                                                                    
        $sequence_4 = { 8d542414 50 51 52 8d842494030000 68???????? 50 }
                                                                                                
        $sequence_5 = { 8bb4247c010000 b980000000 8d5624 c6460873 8bfa f3ab }
                                                                                    
        $sequence_6 = { 33c9 8a4e01 8bf9 8d5703 }
                                                            
        $sequence_7 = { 8d542464 c744246400020000 52 f3a5 e8???????? }
                                                                        
        $sequence_8 = { 8d942474010000 57 52 8bf0 ff15???????? }
                                                                        
        $sequence_9 = { 762e 83cfff 2b7de4 03c7 8b7dd8 3bce 731f }
                                                                                                
        $sequence_10 = { 7509 8b8c85b049ffff eb02 33c9 8d8485b449ffff }
                                                                        
        $sequence_11 = { 0f85ac000000 3bf9 7531 8d9d887fffff 3bc3 7427 }
                                                                                    
        $sequence_12 = { 66898dc0f5ffff 8d8dc4fdffff 8955dc 8945e0 51 8d9598e3ffff 68???????? }
                                                                                                
        $sequence_13 = { 3b85b849ffff 7316 8b4588 8d3438 8d85887fffff }
                                                                        
        $sequence_14 = { 56 57 8b35???????? 85f6 741b }
                                                                        
        $sequence_15 = { 8b442424 8b4c2428 8d9d28030000 6804010000 53 }
                                                                        
    condition:
        7 of them and filesize < 188416
}

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

a77d665d-7e44-4ba9-b87b-ea984292f865

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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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