win_ratankba_auto

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

Detects win.ratankba.

rule win_ratankba_auto {

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

    


    strings:
        $sequence_0 = { 8d95e9feffff 53 52 8985c8feffff 898dc4feffff 889de8feffff e8???????? }
                                                                                                
        $sequence_1 = { e8???????? 8be5 5d c3 53 57 ff15???????? }
                                                                                                
        $sequence_2 = { 7509 5f 83c8ff 5e 5d c20800 8b4d0c }
                                                                                                
        $sequence_3 = { e8???????? 83c40c 57 e8???????? 8bbdb8eeffff 83c404 8b9530efffff }
                                                                                                
        $sequence_4 = { e8???????? 8b5304 8b4b14 894cc204 }
                                                            
        $sequence_5 = { 8b04ca 50 e8???????? 8b4f10 894de4 8b4d08 }
                                                                                    
        $sequence_6 = { ff15???????? 85c0 0f8463ffffff 8d55a8 52 8d45ec 50 }
                                                                                                
        $sequence_7 = { 8bf0 83c404 89b510efffff 85f6 0f8400030000 }
                                                                        
        $sequence_8 = { 7430 8b8be0000000 8d9538efffff 52 51 50 }
                                                                                    
        $sequence_9 = { 8bc7 897318 897314 8933 89731c 8d5002 }
                                                                                    
    condition:
        7 of them and filesize < 303104
}

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

2b792866-7f45-4c2e-a350-770f6ffe2cc2

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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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