win_ketrum_auto

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

Detects win.ketrum.

rule win_ketrum_auto {

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

    


    strings:
        $sequence_0 = { 037de4 8d8c0f53144402 c1c109 03c8 8bfe f7d7 23f8 }
                                                                                                
        $sequence_1 = { e8???????? be00020000 56 8d8584faffff 6a00 50 }
                                                                                    
        $sequence_2 = { 8dbdfcefffff f3a5 be00080000 56 8d85fcdfffff 6a00 }
                                                                                    
        $sequence_3 = { 83c107 51 68???????? e8???????? 68???????? ff75f4 }
                                                                                    
        $sequence_4 = { b9???????? e8???????? 68???????? 6a0f 58 }
                                                                        
        $sequence_5 = { 56 e8???????? 59 59 85c0 742f b9???????? }
                                                                                                
        $sequence_6 = { 7e0d 33db 53 53 68???????? 6a03 }
                                                                                    
        $sequence_7 = { 33c0 0fb7f0 8bc6 c1e610 ba???????? }
                                                                        
        $sequence_8 = { e8???????? 8945f8 85c0 7905 83c8ff }
                                                                        
        $sequence_9 = { 59 7202 8b00 68???????? 50 8d85f0feffff 68???????? }
                                                                                                
        $sequence_10 = { 83c40c 837d3c10 7303 8d4528 50 }
                                                                        
        $sequence_11 = { 8db5a8fdffff c645fc02 e8???????? ffb51cfdffff ff15???????? }
                                                                        
        $sequence_12 = { ffd7 8bf0 85f6 7f2b 8b93b0000000 33c0 }
                                                                                    
        $sequence_13 = { 6a01 8db594feffff c645fc00 e8???????? 83ec1c }
                                                                        
        $sequence_14 = { ab ab ab 8d85f8eeffff }
                                                            
        $sequence_15 = { 68???????? e8???????? 68???????? ff15???????? 8b7508 c7465c20a24100 }
                                                                                    
    condition:
        7 of them and filesize < 4599808
}

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

6f7d9b6b-96e7-4b89-803a-57a0bbb72be5

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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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