win_brbbot_auto

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

Detects win.brbbot.

rule win_brbbot_auto {

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

    


    strings:
        $sequence_0 = { 48f7d1 48ffc9 483bd9 7304 }
                                                            
        $sequence_1 = { 7416 eb0c ba0a000000 4c8d05ce3affff }
                                                            
        $sequence_2 = { 498dbe0c030000 f2ae 48f7d1 48ffc9 }
                                                            
        $sequence_3 = { 48c7c2feffffff 448d4203 e8???????? ba0a000000 4c8d05e23affff 663955d8 }
                                                                                    
        $sequence_4 = { 750a bf0e000780 e9???????? 488d442470 }
                                                            
        $sequence_5 = { 85c0 747f 035c2420 4439642478 0f856dffffff }
                                                                        
        $sequence_6 = { 488bcd e8???????? 4885c0 7403 448820 ba20000000 }
                                                                                    
        $sequence_7 = { 85db 744d 880a 4b8b84f9c05a0100 4103da 48ffc2 }
                                                                                    
        $sequence_8 = { ff15???????? 488b5c2438 8bf8 85c0 }
                                                            
        $sequence_9 = { f2ae 48f7d1 4c8d41ff 488d8b04010000 e8???????? 4883c9ff 33c0 }
                                                                                                
    condition:
        7 of them and filesize < 198656
}

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

951e2742-38cf-4575-a1fd-3519b148ef89

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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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