win_erbium_stealer_auto

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

Detects win.erbium_stealer.

rule win_erbium_stealer_auto {

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

    


    strings:
        $sequence_0 = { ffd6 8b5c2414 6a00 6a01 }
                                                            
        $sequence_1 = { 69d993010001 3bc7 75de 8b7dfc 81fb3b3b2aa6 }
                                                                        
        $sequence_2 = { 8945f4 837df400 0f84a5000000 68???????? }
                                                            
        $sequence_3 = { 8b4df4 8b55fc 035110 8955b0 8b45f4 }
                                                                        
        $sequence_4 = { 75f6 51 8d4c2454 40 }
                                                            
        $sequence_5 = { eb12 8b4dd4 83c101 894dd4 8b55ec 83c228 8955ec }
                                                                                                
        $sequence_6 = { 8b45fc 0302 8b4de0 0fb711 81e2ff0f0000 03c2 8945d4 }
                                                                                                
        $sequence_7 = { 8945dc 8b4de0 83c102 894de0 8b55dc 3b55c4 }
                                                                                    
        $sequence_8 = { 035110 8955e8 837df000 7506 8b45e8 8945f0 eb12 }
                                                                                                
        $sequence_9 = { 8b45fc 03440a60 8945b4 8b4db4 8b510c }
                                                                        
    condition:
        7 of them and filesize < 33792
}

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

284143fa-227e-4d60-8bfb-d0331187ab60

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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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