win_cobra_auto

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

Detects win.cobra.

rule win_cobra_auto {

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

    


    strings:
        $sequence_0 = { 7511 e8???????? 85c0 7508 ff15???????? }
                                                                        
        $sequence_1 = { ff25???????? 8b442408 85c0 750e 3905???????? 7e2c ff0d???????? }
                                                                                                
        $sequence_2 = { 5b c3 85db 7405 83fb03 753b }
                                                                                    
        $sequence_3 = { 83f801 75f1 b900010000 e8???????? }
                                                            
        $sequence_4 = { 757f 8b05???????? 85c0 0f8e8c000000 }
                                                            
        $sequence_5 = { 5f 5e 5b c3 85ff 7418 }
                                                                                    
        $sequence_6 = { c20c00 ff25???????? 53 56 57 8bd9 33f6 }
                                                                                                
        $sequence_7 = { 7514 391d???????? 754d 33c0 }
                                                            
        $sequence_8 = { 85c0 0f8e8c000000 83e801 8905???????? }
                                                            
        $sequence_9 = { e8???????? 8bf8 83fb01 751d 85ff }
                                                                        
        $sequence_10 = { 5b c3 83fb01 7405 83fb02 7537 }
                                                                                    
        $sequence_11 = { 33d2 b9e8030000 f7f1 83f805 }
                                                            
        $sequence_12 = { 813c0850450000 7503 33c0 c3 }
                                                            
        $sequence_13 = { eb22 8bd0 2bd1 81fa00040000 7c14 e8???????? }
                                                                                    
        $sequence_14 = { 83f8ff 7407 33c0 e9???????? ff15???????? e9???????? }
                                                                                    
        $sequence_15 = { c9 c3 6a02 56 }
                                                            
        $sequence_16 = { eb10 8d4608 50 e8???????? 8b4508 8930 33c0 }
                                                                                                
        $sequence_17 = { 85c0 7f07 e8???????? eb26 83c0ff }
                                                                        
        $sequence_18 = { e8???????? 33db 3bc3 741a }
                                                            
        $sequence_19 = { eb6d e8???????? 85c0 7564 }
                                                            
        $sequence_20 = { e8???????? 4c8b1e 498b03 488bd5 488bce ff5064 488b0e }
                                                                                                
        $sequence_21 = { 7e4b 4c8b505c 4d85d2 7442 }
                                                            
        $sequence_22 = { e8???????? 4c8b1e 418bd4 498b03 488bce ff5024 488d4d08 }
                                                                                                
        $sequence_23 = { 7548 488b05???????? 4885c0 743c 488b8c24a0000000 }
                                                                        
        $sequence_24 = { e8???????? 4c8b1e 498b03 418bd4 488bce ff501c 488d4d08 }
                                                                                                
        $sequence_25 = { 7504 33c0 eb05 b865005921 }
                                                            
        $sequence_26 = { 83781400 750a b865005921 e9???????? }
                                                            
        $sequence_27 = { ff15???????? 83f87a 740b 3d230000c0 }
                                                            
        $sequence_28 = { c3 8b4d08 57 51 6a00 }
                                                                        
        $sequence_29 = { 6a18 8d45e8 50 6a00 6aff e8???????? 85c0 }
                                                                                                
        $sequence_30 = { 83c0fe 668b4802 83c002 663bcb 75f4 8b15???????? 8b0d???????? }
                                                                                                
        $sequence_31 = { 8b7d0c 3bc3 7508 3bfb }
                                                            
        $sequence_32 = { 8908 8b0d???????? 895004 894808 33c0 }
                                                                        
        $sequence_33 = { 6689440ffc 6685c0 75ee f685c003000010 }
                                                            
        $sequence_34 = { 8bec 56 6a00 6880000000 6a03 6a00 6a03 }
                                                                                                
        $sequence_35 = { 68???????? 51 ffd6 83c40c 6a28 }
                                                                        
        $sequence_36 = { 6a03 68000000c0 50 ff15???????? 8bf0 83feff 7505 }
                                                                                                
        $sequence_37 = { 83feff 7505 33c0 5e 5d c3 8b4d08 }
                                                                                                
        $sequence_38 = { 33c0 4881c4480d0000 415f 415e 415c 5e 5b }
                                                                                                
        $sequence_39 = { 488b05???????? 498bcc 488947fe 8b05???????? }
                                                            
        $sequence_40 = { 8d8588feffff 68???????? 50 ff15???????? 83c42c }
                                                                        
        $sequence_41 = { 4533e4 4c8bf1 488bda 488d8d10060000 33d2 41b808020000 }
                                                                                    
        $sequence_42 = { b914000000 84c0 0f45f9 488bce }
                                                            
        $sequence_43 = { 48894c2450 4c89642448 488d4c2468 48894c2440 }
                                                            
        $sequence_44 = { 488bce 8bd7 ff15???????? 85c0 }
                                                            
        $sequence_45 = { 7507 32c0 e9???????? c745b818000000 }
                                                            
        $sequence_46 = { 6685c9 75f5 2bc2 d1f8 66837c43fe5c }
                                                                        
        $sequence_47 = { 33f6 03c2 13ce 51 }
                                                            
        $sequence_48 = { 05a1000000 50 8d84249c0d0000 68???????? }
                                                            
        $sequence_49 = { 0f8431ffffff 8b4d08 5f 8931 }
                                                            
        $sequence_50 = { 0f8456feffff 807c241301 6800080000 0f8544020000 }
                                                            
        $sequence_51 = { 05a2000000 50 8d8c249c0d0000 68???????? }
                                                            
        $sequence_52 = { 0f84100f0000 6800080000 57 56 }
                                                            
        $sequence_53 = { 05a2000000 50 8d94249c0d0000 68???????? }
                                                            
        $sequence_54 = { 668cc8 c3 53 50 }
                                                            
        $sequence_55 = { 85c0 740a b8050000c0 e9???????? }
                                                            
        $sequence_56 = { c745d440000000 8b5508 83c20c 8955d0 }
                                                            
    condition:
        7 of them and filesize < 1368064
}

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

2e85b729-3455-4291-8e35-569814f237fd

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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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