win_chthonic_auto

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

Detects win.chthonic.

rule win_chthonic_auto {

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

    


    strings:
        $sequence_0 = { 8d4df0 51 ff7028 ff5618 84c0 }
                                                                        
        $sequence_1 = { 83fe02 0f850d010000 8b4df0 eb00 894df8 }
                                                                        
        $sequence_2 = { 0f84d4010000 4f 8bf0 8bcf d3ee }
                                                                        
        $sequence_3 = { c1c108 81e1ff00ff00 0bc1 89470c 5f 5e 5b }
                                                                                                
        $sequence_4 = { 83c410 f60680 7408 8a06 32c3 }
                                                                        
        $sequence_5 = { 2500ff00ff c1c108 81e1ff00ff00 0bc1 89470c 5f 5e }
                                                                                                
        $sequence_6 = { 83c304 83c602 ff45fc 8b45fc 3b45f8 72e1 33c0 }
                                                                                                
        $sequence_7 = { 8b36 83c410 f60680 7408 8a06 }
                                                                        
        $sequence_8 = { 47 8a01 8845ff 8d84bdfcfbffff 8b10 }
                                                                        
        $sequence_9 = { 85ff 0f84bd000000 4f 8bf0 }
                                                            
    condition:
        7 of them and filesize < 425984
}

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

e0d2196f-8050-41b0-8141-46f8b8d89e79

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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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