win_netspy_auto

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

Detects win.netspy.

rule win_netspy_auto {

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

    


    strings:
        $sequence_0 = { b810000000 e8???????? 4829c4 488b85b82e0000 4889e1 488901 488b01 }
                                                                                                
        $sequence_1 = { 833d????????0a 0f9cc1 89d0 05b88b5b1a 83c001 }
                                                                        
        $sequence_2 = { 4883ec20 e8???????? 488b95d8130000 448b85e4130000 4883c420 }
                                                                        
        $sequence_3 = { 0f8505000000 e9???????? 488b8510520000 0fbe00 89c1 83e120 }
                                                                                    
        $sequence_4 = { e8???????? 4829c4 488b8518130000 4889e1 }
                                                            
        $sequence_5 = { 3d33084a60 0f8467030000 e9???????? 8b857c2f0000 3da51c0a0c 0f8463010000 }
                                                                                    
        $sequence_6 = { 48898580340000 e9???????? 488b8580340000 488b4018 48898578340000 }
                                                                        
        $sequence_7 = { 4829c4 488b85e8120000 4889e1 48898d58640000 e8???????? 4829c4 }
                                                                                    
    condition:
        7 of them and filesize < 12033024
}

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

77b520db-b97a-44f6-87a0-cd6da121fe1f

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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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