win_morto_auto

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

Detects win.morto.

rule win_morto_auto {

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

    


    strings:
        $sequence_0 = { 7406 802600 46 ebf5 8b4601 46 }
                                                                                    
        $sequence_1 = { ff35???????? c745ec04000000 c745fce8030000 ff15???????? }
                                                            
        $sequence_2 = { 8a0419 41 8d440001 8bf0 }
                                                            
        $sequence_3 = { 83c604 8ac0 56 ff15???????? }
                                                            
        $sequence_4 = { 83ec1c 8b4508 8365f400 8945e8 8b450c 8945f0 }
                                                                                    
        $sequence_5 = { 3a1f 751a 84c0 7412 8a5e01 8ac3 }
                                                                                    
        $sequence_6 = { 8945d8 c745dc44726f70 c745e0004d5c57 ff15???????? 33db 59 3bc3 }
                                                                                                
        $sequence_7 = { 56 8b5178 57 8945fc 03d0 }
                                                                        
        $sequence_8 = { 280c30 40 3b450c 72f4 8b4608 }
                                                                        
        $sequence_9 = { 85c0 7521 8d45e4 8bce 50 e8???????? }
                                                                                    
    condition:
        7 of them and filesize < 49152
}

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

85143455-e1c6-407d-b5c0-8f134c22c7a5

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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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