win_emdivi_auto

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

Detects win.emdivi.

rule win_emdivi_auto {

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

    


    strings:
        $sequence_0 = { 3bd1 7cf5 6a1e 58 5f c9 c3 }
                                                                                                
        $sequence_1 = { 33d2 f7f7 8bf8 0fb606 c1e802 }
                                                                        
        $sequence_2 = { ff45fc e8???????? 3945fc 0f8e75ffffff e9???????? 8b45fc }
                                                                                    
        $sequence_3 = { 295d08 41 8801 0fb64601 }
                                                            
        $sequence_4 = { 8b4508 ff45f8 85c0 7405 }
                                                            
        $sequence_5 = { 8955ec 83c006 69c0b979379e 8945fc 8b55f0 c1e802 83e003 }
                                                                                                
        $sequence_6 = { 8945f4 8b45e0 83c40c 40 8945f8 8b45dc 8945fc }
                                                                                                
        $sequence_7 = { eb04 2bc8 03ca 880c32 42 3bd0 72e5 }
                                                                                                
        $sequence_8 = { c1ef03 33fb 8b5d08 03c7 8bfa 83e703 }
                                                                                    
        $sequence_9 = { 2bca 03c8 eb04 2bc8 03ca }
                                                                        
    condition:
        7 of them and filesize < 581632
}

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

8ace220f-5560-419a-8df8-decd3a04a660

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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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