win_royal_dns_auto

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

Detects win.royal_dns.

rule win_royal_dns_auto {

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

    


    strings:
        $sequence_0 = { 83ff02 7314 5f b03d 884102 5e }
                                                                                    
        $sequence_1 = { 8bd6 e8???????? 8d85b1fcffff 83c404 8d5001 }
                                                                        
        $sequence_2 = { 8bf0 c1e605 8bf8 c1ef02 03f7 0fbe39 03f7 }
                                                                                                
        $sequence_3 = { 84c9 75f9 eb5f 8b8db0fcffff }
                                                            
        $sequence_4 = { 50 83c611 ffd3 b9ff000000 663bc1 760e }
                                                                                    
        $sequence_5 = { 7468 0fb606 c1e802 0fb68070132500 8801 }
                                                                        
        $sequence_6 = { 8d95ecf5ffff 52 8b95f8f5ffff 8d85fcf5ffff 50 8d8de8f5ffff 51 }
                                                                                                
        $sequence_7 = { 68ff070000 8d85fdf5ffff 6a00 bb???????? 50 }
                                                                        
        $sequence_8 = { 3bf8 721d 8bce 8d5580 }
                                                            
        $sequence_9 = { 8b8d9cfcffff a4 89858cfcffff 8b01 }
                                                            
    condition:
        7 of them and filesize < 204800
}

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

4ab39e6a-7694-4e33-92f5-31710647701e

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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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