win_kuluoz_auto

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

Detects win.kuluoz.

rule win_kuluoz_auto {

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

    


    strings:
        $sequence_0 = { 8b4508 83b84e12000001 7404 32c0 eb7f 8b4d10 51 }
                                                                                                
        $sequence_1 = { 3395f4feffff 8985f0feffff 8995f4feffff 68ff000000 8d8df8feffff 51 e8???????? }
                                                                                                
        $sequence_2 = { 8b4dc8 51 ff55e0 8945c4 8b55d4 8b02 3b45c4 }
                                                                                                
        $sequence_3 = { e8???????? 0fb6c0 85c0 0f84e6000000 8d4df4 51 8d9578ffffff }
                                                                                                
        $sequence_4 = { 894d0c 8b5510 2b55f8 895510 8b45fc 0345f8 8945fc }
                                                                                                
        $sequence_5 = { 8945f0 8b4de8 894df4 8b55ec 8955f8 8b45f0 }
                                                                                    
        $sequence_6 = { c745fc00000000 eb09 8b4dfc 83c101 894dfc 837dfc08 7328 }
                                                                                                
        $sequence_7 = { eb5a 68???????? 8b5508 81c206020000 52 ff15???????? }
                                                                                    
        $sequence_8 = { 50 e8???????? e9???????? 8d8decfbffff 51 }
                                                                        
        $sequence_9 = { 6a04 8d45e4 50 8b8d64fdffff }
                                                            
    condition:
        7 of them and filesize < 65536
}

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

062d7efd-0bb5-49cd-a942-d0c01c1fb6df

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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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