win_sharpknot_auto

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

Detects win.sharpknot.

rule win_sharpknot_auto {

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

    


    strings:
        $sequence_0 = { f2ae 8bcb 4f c1e902 f3a5 8b84241c020000 8bcb }
                                                                                                
        $sequence_1 = { 85c0 7423 8bce 8bc6 c1f905 83e01f 8b0c8d40e64400 }
                                                                                                
        $sequence_2 = { 85c0 7405 83c60a ebe8 bb01000000 85db }
                                                                                    
        $sequence_3 = { c1fa02 8bca 897c2430 c1e91f 03d1 83fa01 0f83b3000000 }
                                                                                                
        $sequence_4 = { 50 6a00 ff15???????? 8d8c240c010000 }
                                                            
        $sequence_5 = { 6a01 56 ff15???????? 68e8030000 ff15???????? }
                                                                        
        $sequence_6 = { 7505 5f 33c0 5b c3 803f00 7505 }
                                                                                                
        $sequence_7 = { 68???????? ff15???????? 8bf0 85f6 0f84b6000000 8b1d???????? 68???????? }
                                                                                                
        $sequence_8 = { 7cf1 56 8bf1 c1e603 3b9670da4000 }
                                                                        
        $sequence_9 = { 83651003 8bf0 750b c1e602 8b86e8dc4000 eb09 c1e602 }
                                                                                                
    condition:
        7 of them and filesize < 1032192
}

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

1fa07e0b-2d26-477c-86c1-f0cdc052cbf7

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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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