win_dnespy_auto

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

Detects win.dnespy.

rule win_dnespy_auto {

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

    


    strings:
        $sequence_0 = { 8d4508 0f434508 50 8d85f0feffff 6804010000 50 ff15???????? }
                                                                                                
        $sequence_1 = { 8bc1 c1e806 33c8 3bd3 75e8 8d0cc9 8bc1 }
                                                                                                
        $sequence_2 = { c74644c0184500 e9???????? c7464410194500 e9???????? c7464458194500 e9???????? }
                                                                                    
        $sequence_3 = { e8???????? 83c408 33c0 e9???????? ff15???????? 83c404 57 }
                                                                                                
        $sequence_4 = { 344e 8885a8fbffff 8b85a4fbffff fec0 346f 8885a9fbffff 8b85a4fbffff }
                                                                                                
        $sequence_5 = { 83e01f 8bc8 83f801 894dd0 8d48ff }
                                                                        
        $sequence_6 = { 8b4020 ffd0 c645fc1c 8b8dfcfaffff 888568fbffff 85c9 7413 }
                                                                                                
        $sequence_7 = { e8???????? 83c40c 8d85d0dfffff 83bde4dfffff08 0f4385d0dfffff 50 8d85e8dfffff }
                                                                                                
        $sequence_8 = { c70100000000 c7410400000000 85d2 7411 8b3a 85ff 7404 }
                                                                                                
        $sequence_9 = { c1e808 884c2415 0facc108 c1e808 884c2416 0facc108 8d442410 }
                                                                                                
    condition:
        7 of them and filesize < 794624
}

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

d7736038-9a8d-4a45-a504-74a688e11eec

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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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