win_necurs_auto

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

Detects win.necurs.

rule win_necurs_auto {

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

    


    strings:
        $sequence_0 = { 397508 7604 33c0 eb12 e8???????? 2b7508 }
                                                                                    
        $sequence_1 = { 8935???????? 890d???????? 8bc1 5e c3 }
                                                                        
        $sequence_2 = { 8bc2 034508 5e 5d c3 55 }
                                                                                    
        $sequence_3 = { 8bf2 ba06e0a636 f7e2 03c8 a1???????? 13f2 33d2 }
                                                                                                
        $sequence_4 = { 8bc8 a1???????? 56 8bf2 ba06e0a636 }
                                                                        
        $sequence_5 = { 33d2 46 f7f6 8bc2 034508 5e }
                                                                                    
        $sequence_6 = { 13f2 33d2 030d???????? a3???????? a1???????? }
                                                                        
        $sequence_7 = { a1???????? 13f2 a3???????? 8935???????? }
                                                            
        $sequence_8 = { 8d85ecfbffff 57 50 e8???????? 83c410 }
                                                                        
        $sequence_9 = { 33d7 33c1 52 50 e8???????? }
                                                                        
        $sequence_10 = { 8bc1 8bd7 e9???????? 83caff 8bc2 e9???????? }
                                                                                    
        $sequence_11 = { 8bc1 0bc7 7409 8bc1 8bd7 e9???????? }
                                                                                    
        $sequence_12 = { 33d2 5e 5f c9 }
                                                            
        $sequence_13 = { 50 ffd6 8bf8 59 59 85ff }
                                                                                    
        $sequence_14 = { 53 ff15???????? 59 33c0 5e 5b }
                                                                                    
        $sequence_15 = { 6a7d 50 ffd6 59 59 85c0 74ce }
                                                                                                
    condition:
        7 of them and filesize < 475136
}

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

a4d6b19c-3c07-40af-8dbf-554b19ed0a69

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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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