win_kaolin_rat_auto

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

Detects win.kaolin_rat.

rule win_kaolin_rat_auto {

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

    


    strings:
        $sequence_0 = { 488b4230 488988f8000000 488d0ddb530300 488b4230 48898800010000 488d0dd1530300 488b4230 }
                                                                                                
        $sequence_1 = { 742f 0f1f4000 8b16 4903d7 498bc8 e8???????? 85c0 }
                                                                                                
        $sequence_2 = { 488988d8000000 488d0dc6550300 488b4228 488988e0000000 488d0dbc550300 488b4228 488988e8000000 }
                                                                                                
        $sequence_3 = { 4889842418010000 488d842408010000 4883fa10 480f43842408010000 46880c30 42c644300100 eb0d }
                                                                                                
        $sequence_4 = { c1e102 2bc1 4863c8 420fb6442102 324302 41884305 8bc6 }
                                                                                                
        $sequence_5 = { e8???????? 4c8bcf 48833d????????10 4c0f430d???????? 48c7c7ffffffff 0f1f8000000000 }
                                                                                    
        $sequence_6 = { 498bd7 498bcb ff15???????? 85c0 0f8409010000 448b13 4c8bdd }
                                                                                                
        $sequence_7 = { 410f1106 0f104c2470 410f114e10 4c89642470 48c74424780f000000 c644246000 }
                                                                                    
        $sequence_8 = { 41b800300000 4c89b424b0000000 488bd7 ff15???????? 4889442420 4c8bf0 }
                                                                                    
        $sequence_9 = { 49c1fa06 4e8d1ced00000000 4d03dd 418a0438 41ffc1 4b8b8cd7f0070400 }
                                                                                    
    condition:
        7 of them and filesize < 581632
}

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

89068150-1a3c-48c5-990b-8f2aced2123e

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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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