win_ashen_auto

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

Detects win.ashen.

rule win_ashen_auto {

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

    


    strings:
        $sequence_0 = { 488bc3 498784fd504e0200 4885c0 7409 }
                                                            
        $sequence_1 = { e9???????? 81fa18070000 774c b92d000000 4c8d0d95df0000 33f6 448bd6 }
                                                                                                
        $sequence_2 = { 418bc2 41ffc2 8d0c92 03c9 2bc1 4898 0fb6843048f60100 }
                                                                                                
        $sequence_3 = { 488bc8 488bf8 e8???????? c6043b00 4885ff 7445 }
                                                                                    
        $sequence_4 = { d1f8 4863e8 4c8bf5 4d03f6 4b8b94f790b80100 e8???????? 85c0 }
                                                                                                
        $sequence_5 = { 4883ec40 488b05???????? 4833c4 4889442430 488bb424a0000000 488d1d4b850100 }
                                                                                    
        $sequence_6 = { 4883ec28 803d????????00 754c 488d0d28610100 }
                                                            
        $sequence_7 = { 488d0d4eda0100 e8???????? 4c8bf8 498bd6 6666660f1f840000000000 }
                                                                        
        $sequence_8 = { 8364246000 488d35eecd0100 bd00010000 4c8d4c2460 8bd5 448d47f6 488bce }
                                                                                                
        $sequence_9 = { 0f114170 0f118980000000 48898190000000 488d05fc140000 498b0b 4889458f 488b454f }
                                                                                                
    condition:
        7 of them and filesize < 348160
}

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

f0e96e39-4493-4c5c-ac26-2f7db445d3f4

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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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