win_kikothac_auto

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

Detects win.kikothac.

rule win_kikothac_auto {

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

    


    strings:
        $sequence_0 = { 9c 8d642448 e9???????? 895c2434 e9???????? }
                                                                        
        $sequence_1 = { f8 6639d4 6698 c64424080e 50 38c6 98 }
                                                                                                
        $sequence_2 = { 9c e8???????? c6042405 c644241079 ff742430 8f4500 }
                                                                                    
        $sequence_3 = { 68ff010f00 50 8955e8 ff15???????? 85c0 7419 8b13 }
                                                                                                
        $sequence_4 = { 85f6 7e34 ff15???????? a3???????? 8bc6 8d9de0f8ffff b9???????? }
                                                                                                
        $sequence_5 = { ff3424 66894500 9c ff3424 8d642438 e9???????? 0fc0c1 }
                                                                                                
        $sequence_6 = { 33c0 40 e9???????? 8365d800 c745dc59cb4000 }
                                                                        
        $sequence_7 = { 8b4df4 03c2 668b55f8 8908 8a4dfa 66895004 884806 }
                                                                                                
        $sequence_8 = { 57 51 ff15???????? 85c0 0f85ae000000 }
                                                                        
        $sequence_9 = { 50 8d75f0 e8???????? 8b75f8 85f6 75d9 }
                                                                                    
    condition:
        7 of them and filesize < 581632
}

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

ec6d8297-f647-4fda-8357-a6eb265b16b5

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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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