win_breakthrough_loader_auto

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

Detects win.breakthrough_loader.

rule win_breakthrough_loader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.breakthrough_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.breakthrough_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 = { 8a8008394400 8807 47 41 898d70ffffff 8b55b0 8b8d74ffffff }
                                                                                                
        $sequence_1 = { 57 8d3c8548374500 8b0f 85c9 740b 8d4101 }
                                                                                    
        $sequence_2 = { 89049d40354500 85c0 742f 8305????????40 8bfb c1e706 57 }
                                                                                                
        $sequence_3 = { 8a81402b4500 8845dc ff75dc 8b89382b4500 e8???????? 83f8ff 750e }
                                                                                                
        $sequence_4 = { 56 e8???????? 8b4dd8 83c40c eb54 }
                                                                        
        $sequence_5 = { 83fe06 7ce7 8d8c2490000000 c747072e657865 c6470b00 e8???????? }
                                                                                    
        $sequence_6 = { 6bd030 8b45fc 03148d40354500 8b00 894218 8a03 884228 }
                                                                                                
        $sequence_7 = { 8b0cb540354500 83c410 8985f4efffff 8bc2 8b95f4efffff }
                                                                        
        $sequence_8 = { 8d85c8d6ffff 6810270000 6a00 50 }
                                                            
        $sequence_9 = { 8b45fc 53 8901 e8???????? 8b45f8 83c404 5f }
                                                                                                
    condition:
        7 of them and filesize < 753664
}

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

d84e927c-79f2-463b-bb38-7c6885d1035a

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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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