win_chairsmack_auto

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

Detects win.chairsmack.

rule win_chairsmack_auto {

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

    


    strings:
        $sequence_0 = { 8d4db8 6a06 68???????? e8???????? 6aff 6a00 68???????? }
                                                                                                
        $sequence_1 = { 0f8534010000 8b5508 8b0495cc504a00 83e001 743e 8b4d08 833c8dd8504a00ff }
                                                                                                
        $sequence_2 = { 8b55fc 52 ff15???????? 3305???????? b904000000 6bd105 8982a0784a00 }
                                                                                                
        $sequence_3 = { 8d84240c010000 8bcc 8964242c 50 e8???????? 83ec1c c68424b803000084 }
                                                                                                
        $sequence_4 = { 894608 83ec0c c645fc03 8bf4 c70600000000 }
                                                                        
        $sequence_5 = { 8b0495e89b4800 0fb74df8 8b55f4 0fb70442 33c1 0fbf4dfc 8b148de89b4800 }
                                                                                                
        $sequence_6 = { 8964242c 68???????? e8???????? 83ec1c c68424b803000055 8bcc 8964244c }
                                                                                                
        $sequence_7 = { 0f840f000000 8365f0fe 8b4de0 83c170 e9???????? c3 8d4dec }
                                                                                                
        $sequence_8 = { 6a19 68???????? 8d4c2450 c68424880300001c e8???????? 837c246010 8d74244c }
                                                                                                
        $sequence_9 = { e8???????? 6aff 6a00 8d842488000000 c684248803000081 50 8d4c2454 }
                                                                                                
    condition:
        7 of them and filesize < 1974272
}

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

3e9a6f55-65a8-4df3-8722-29cb5d054435

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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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