win_meow_auto

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

Detects win.meow.

rule win_meow_auto {

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

    


    strings:
        $sequence_0 = { 6bc10b 99 f7fb 8d427f 99 f7fb 88943509ffffff }
                                                                                                
        $sequence_1 = { 99 f7f9 85d2 0f857f000000 0f1f00 8b45f4 40 }
                                                                                                
        $sequence_2 = { bb0c000000 56 8bf7 8d7b73 0f1f4000 8a06 }
                                                                                    
        $sequence_3 = { 8945f4 8b45f4 99 f7fe 85d2 0f855bffffff 90 }
                                                                                                
        $sequence_4 = { 8d4c2411 51 8d8c24d0030000 51 ffd0 85c0 0f8426030000 }
                                                                                                
        $sequence_5 = { 8a8579ffffff 80bd78ffffff00 897dcc 753a 33f6 0f1f840000000000 8a843579ffffff }
                                                                                                
        $sequence_6 = { 68000000c0 56 ffd0 6a5d 680038ab9a ba0f000000 894304 }
                                                                                                
        $sequence_7 = { c68527ffffff04 c68528ffffff3b c68529ffffff17 c6852affffff3b c6852bffffff79 c6852cffffff3b c6852dffffff79 }
                                                                                                
        $sequence_8 = { c685c1fdffff73 c685c2fdffff3f c685c3fdffff40 c685c4fdffff3f c685c5fdffff3f c685c6fdffff3f 8a85bdfdffff }
                                                                                                
        $sequence_9 = { c68588f8ffff68 c68589f8ffff44 c6858af8ffff68 c6858bf8ffff4e c6858cf8ffff68 c6858df8ffff68 c6858ef8ffff68 }
                                                                                                
    condition:
        7 of them and filesize < 492544
}

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

30a175c7-5356-45a6-841d-e9d541679808

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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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