win_kutaki_auto

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

Detects win.kutaki.

rule win_kutaki_auto {

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

    


    strings:
        $sequence_0 = { 8b8d50ffffff 51 ff502c dbe2 89854cffffff 83bd4cffffff00 7d23 }
                                                                                                
        $sequence_1 = { 881401 c745fc0b000000 e9???????? c745fc0c000000 c745fc0d000000 8b45d8 8945c0 }
                                                                                                
        $sequence_2 = { 83c40c 0fbf954cffffff 85d2 742c c745fc08000000 66c745dc0000 c745fc09000000 }
                                                                                                
        $sequence_3 = { 50 8b4da0 51 ff15???????? 898518ffffff eb0a c78518ffffff00000000 }
                                                                                                
        $sequence_4 = { ff15???????? 8985a8feffff eb0a c785a8feffff00000000 8d4d90 ff15???????? 8d8550ffffff }
                                                                                                
        $sequence_5 = { ff15???????? 898508feffff 8b9568ffffff 8b420c 8b8d08feffff 8b1408 8d4d94 }
                                                                                                
        $sequence_6 = { ff15???????? 8d55dc 899544ffffff eb09 8d45dc 898544ffffff 8b8d44ffffff }
                                                                                                
        $sequence_7 = { 8b9588feffff c1e202 89950cfeffff eb0c ff15???????? 89850cfeffff 8b4508 }
                                                                                                
        $sequence_8 = { 6880000000 ff15???????? 83c41c c745fc06000000 c745fc07000000 8b4508 8b08 }
                                                                                                
        $sequence_9 = { ff15???????? 83c420 50 6a00 8d8568ffffff 50 }
                                                                                    
    condition:
        7 of them and filesize < 1335296
}

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

8dcee316-8769-4f74-95e6-38eb084afe76

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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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