win_mortis_auto

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

Detects win.mortis.

rule win_mortis_auto {

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

    


    strings:
        $sequence_0 = { 8bc7 8bcf 83e03f c1f906 6bf038 03348d201f4400 }
                                                                                    
        $sequence_1 = { 83c40c 85ff 0f8453010000 8d5e04 c6464801 895e0c 8d4608 }
                                                                                                
        $sequence_2 = { c785e4fdffff00000000 e8???????? c645fc04 8d8de8fdffff 6a0b 0f57c0 c785f8fdffff00000000 }
                                                                                                
        $sequence_3 = { 8945c4 894db0 8d50ec 3bca 747a }
                                                                        
        $sequence_4 = { e8???????? c645fc2f 0f57c0 6a04 68???????? b9???????? }
                                                                                    
        $sequence_5 = { 83e03f c1fa06 6bc838 8b0495201f4400 f644082801 7422 8d4508 }
                                                                                                
        $sequence_6 = { 7583 8d45d8 c6473e01 3945cc 0f8473ffffff 668bc3 e9???????? }
                                                                                                
        $sequence_7 = { 8d41f8 89840d04ffffff 8d8570ffffff c645fc03 50 c78570ffffff90044300 e8???????? }
                                                                                                
        $sequence_8 = { 83f8ff 740a 32db 885d0c e9???????? 33c9 }
                                                                                    
        $sequence_9 = { ff75e4 0f4355d4 8bc8 e8???????? 83c404 50 e8???????? }
                                                                                                
    condition:
        7 of them and filesize < 577536
}

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

66044715-892f-465c-be71-66fd6c4291c9

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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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