win_bibi_auto

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

Detects win.bibi.

rule win_bibi_auto {

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

    


    strings:
        $sequence_0 = { 8bda 4c8d05a25a0100 488bf9 488d1538470100 b904000000 e8???????? 8bd3 }
                                                                                                
        $sequence_1 = { ff15???????? 488d15c0920100 488bcb 488905???????? ff15???????? }
                                                                        
        $sequence_2 = { 488d4f20 48837f3808 7204 488b4f20 41b809000000 488d9424f0020000 e8???????? }
                                                                                                
        $sequence_3 = { 664489742430 458d4601 488d159c940200 488d4c2430 e8???????? 90 488d542430 }
                                                                                                
        $sequence_4 = { 49895008 41894020 41f6c204 7427 0fb60a 83e10f 4a0fbe841970390200 }
                                                                                                
        $sequence_5 = { 498bc8 e8???????? 488d059dff0100 48897b38 48c7434007000000 488d4b08 66897b28 }
                                                                                                
        $sequence_6 = { 428a8c3180390200 4c2bc2 418b50fc d3ea 41895314 488b5c2410 4c2bc7 }
                                                                                                
        $sequence_7 = { 48635708 4c8d3d2c24ffff 48035508 0fb60a 83e10f 4a0fbe843970390200 }
                                                                                    
        $sequence_8 = { 488d158a640200 488d4dbf e8???????? 488d4dbf }
                                                            
        $sequence_9 = { 41bf01000000 4c89a42498000000 4c89a424a8000000 48c78424b000000007000000 48c78424c802000005000000 }
                                                                        
    condition:
        7 of them and filesize < 462848
}

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

5d7ffb25-e23e-4a3b-8af1-bd7fccc37ff8

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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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