win_himera_loader_auto

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

Detects win.himera_loader.

rule win_himera_loader_auto {

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

    


    strings:
        $sequence_0 = { 6a44 6a00 8d858482ffff 50 e8???????? 83c40c 33c9 }
                                                                                                
        $sequence_1 = { c645eb42 c645ec2e 64a12c000000 8b08 8b15???????? 3b9104000000 }
                                                                                    
        $sequence_2 = { c645e841 c645e940 c645ea00 c645eb4b c645ec56 }
                                                                        
        $sequence_3 = { 8b4df0 8b048500a14200 807c012800 7d5d 8d45d8 50 }
                                                                                    
        $sequence_4 = { 3d75e7111a 750e 8b45e8 50 }
                                                            
        $sequence_5 = { 8b048d00a14200 33c9 41 897df0 894de0 8a543828 }
                                                                                    
        $sequence_6 = { c745e4503f4200 eb10 c745e4583f4200 eb07 c745e4443f4200 8b4508 8bcf }
                                                                                                
        $sequence_7 = { c1e200 8b4508 0fb70c10 51 e8???????? 83c408 8b55fc }
                                                                                                
        $sequence_8 = { e8???????? 83c410 ebb2 8b953482ffff 52 }
                                                                        
        $sequence_9 = { 8d8d6c82ffff e8???????? 8bc8 e8???????? }
                                                            
    condition:
        7 of them and filesize < 385024
}

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

3638e770-aa17-4f3e-a8e6-5b4c1638f902

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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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