win_smokeloader_auto

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

Detects win.smokeloader.

rule win_smokeloader_auto {

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

    


    strings:
        $sequence_0 = { ff15???????? 8d45f0 50 8d45e8 50 8d45e0 50 }
                                                                                                
        $sequence_1 = { 57 ff15???????? 6a00 6800000002 6a03 }
                                                                        
        $sequence_2 = { 50 8d45e0 50 56 ff15???????? 56 ff15???????? }
                                                                                                
        $sequence_3 = { ff15???????? 8bf0 8d45dc 50 6a00 }
                                                                        
        $sequence_4 = { 50 6a00 53 ff15???????? 8d45f0 }
                                                                        
        $sequence_5 = { 50 56 681f000f00 57 }
                                                            
        $sequence_6 = { 50 53 53 6803800000 ff75f4 }
                                                                        
        $sequence_7 = { 0fb64405dc 50 8d45ec 50 }
                                                            
        $sequence_8 = { 56 8d45fc 50 57 57 6a19 ff75f8 }
                                                                                                
        $sequence_9 = { ff15???????? bf90010000 8bcf e8???????? }
                                                            
        $sequence_10 = { e8???????? 8bf0 8d45fc 50 ff75fc 56 }
                                                                                    
        $sequence_11 = { 740a 83c104 83f920 72f0 }
                                                            
        $sequence_12 = { 668ce8 6685c0 7406 fe05???????? }
                                                            
        $sequence_13 = { 33c0 e9???????? e8???????? b904010000 }
                                                            
        $sequence_14 = { 8b07 03c3 50 ff15???????? }
                                                            
        $sequence_15 = { 56 ff15???????? 50 56 6a00 ff15???????? }
                                                                                    
        $sequence_16 = { 81e1ff000000 8a440c18 30042b 43 3b9c241c010000 72c0 5f }
                                                                                                
        $sequence_17 = { 88543418 0fb64c3c18 0fb6c2 03c8 81e1ff000000 8a440c18 }
                                                                                    
        $sequence_18 = { 50 53 e8???????? 8d8decfdffff 8d95f0fdffff c70200000000 }
                                                                                    
        $sequence_19 = { e8???????? 2500300038 005800 2500300038 }
                                                            
        $sequence_20 = { 50 50 50 51 50 50 56 }
                                                                                                
        $sequence_21 = { 31c0 66894603 8d8de8fdffff 50 50 50 }
                                                                                    
        $sequence_22 = { 8d95f0fdffff c70200000000 6800800000 52 51 6aff }
                                                                                    
        $sequence_23 = { 8b4514 898608020000 56 6aff }
                                                            
        $sequence_24 = { 8db5f8fdffff c60653 56 6a00 }
                                                            
        $sequence_25 = { 8b750c 8b7d10 50 57 }
                                                            
        $sequence_26 = { 55 89e5 81ec5c060000 53 56 }
                                                                        
        $sequence_27 = { 60 89c6 89cf fc }
                                                            
        $sequence_28 = { 89cf fc b280 31db a4 }
                                                                        
        $sequence_29 = { fc 5f 5e 5b }
                                                            
        $sequence_30 = { 30d0 aa e2f3 7505 }
                                                            
        $sequence_31 = { 488b0d???????? 488d5603 4803d3 ff15???????? }
                                                            
        $sequence_32 = { 8d3c8c 8b37 4c 01c6 }
                                                            
        $sequence_33 = { ffc9 49 8d3c8c 8b37 }
                                                            
        $sequence_34 = { 01c7 668b0c4f 41 8b7b1c 4c 01c7 8b048f }
                                                                                                
        $sequence_35 = { 8b6320 4d 01c4 ffc9 49 }
                                                                        
        $sequence_36 = { 55 89e5 81ec54040000 53 }
                                                            
        $sequence_37 = { 488bd8 4584ff 7411 41b101 4d8bc5 }
                                                                        
        $sequence_38 = { 89d0 c1e205 01c2 31c0 ac }
                                                                        
        $sequence_39 = { ba12270000 4889442428 488364242000 498bcf }
                                                            
        $sequence_40 = { c745e438582530 c745e838580000 ff15???????? 488bd7 488bcb e8???????? }
                                                                                    
        $sequence_41 = { 41 8b4b18 45 8b6320 4d }
                                                                        
        $sequence_42 = { 4c8d442448 4883c9ff 8d5708 897c2440 }
                                                            
        $sequence_43 = { 8bec 81ec90000000 e8???????? 8945a0 e8???????? 8945e4 68706586b1 }
                                                                                                
        $sequence_44 = { 895104 6823f9359d 8b8578ffffff 50 e8???????? }
                                                                        
        $sequence_45 = { 33d2 f7f1 8945f8 8b4df8 0faf4df8 8b4510 }
                                                                                    
        $sequence_46 = { 89481c 8b9578ffffff 8b45b4 894220 eb10 8b8d78ffffff }
                                                                                    
        $sequence_47 = { 2d10bf3400 8b4d08 c1e103 33d2 f7f1 }
                                                                        
        $sequence_48 = { 6800100000 8b4d9c 51 e8???????? ebd3 }
                                                                        
        $sequence_49 = { 5b c9 c20800 55 89e5 83ec04 }
                                                                                    
        $sequence_50 = { 75ec 58 29c6 d1ee 037724 }
                                                                        
        $sequence_51 = { 8b7720 01ee 56 ad 01e8 }
                                                                        
        $sequence_52 = { 895130 68b0066a90 8b45e4 50 e8???????? 8945b0 8b4da0 }
                                                                                                
        $sequence_53 = { 8bec 83c4d0 1e 53 }
                                                            
        $sequence_54 = { aa e2f3 7506 7404 }
                                                            
        $sequence_55 = { 56 57 007508 bbb84340c1 4a }
                                                                        
        $sequence_56 = { 7513 8b5510 6bd203 0355e4 8b45fc }
                                                                        
        $sequence_57 = { d1ee 037724 0fb7442efe c1e002 03471c 8b0428 }
                                                                                    
        $sequence_58 = { c1e002 03471c 8b0428 01e8 5e c3 60 }
                                                                                                
        $sequence_59 = { 245d 2e5d 295d38 5d 305d01 }
                                                                        
        $sequence_60 = { b657 11dc b354 47 5d 5d }
                                                                                    
        $sequence_61 = { 5d 5d de9959f7b6b3 b508 5d 5d }
                                                                                    
        $sequence_62 = { a2???????? 78a2 28ada20e611a b6c5 a2???????? }
                                                                        
        $sequence_63 = { a2???????? d89d52d9f05d 5d 5d dc22 }
                                                                        
    condition:
        7 of them and filesize < 245760
}

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

734c6b5d-8fd4-4fbd-9240-7361196e2ed5

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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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