win_purplefox_auto

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

Detects win.purplefox.

rule win_purplefox_auto {

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

    


    strings:
        $sequence_0 = { 488d0dd5b10000 e8???????? 4533db 6644895c2450 33d2 41b806020000 }
                                                                                    
        $sequence_1 = { e8???????? 488bfb 4803ff 4c8d2dd58a0000 49837cfd0000 7404 8bc6 }
                                                                                                
        $sequence_2 = { 8b55d8 52 ffd6 33c0 5f 5e }
                                                                                    
        $sequence_3 = { c7458030000000 48897588 4889742420 c7459840020000 }
                                                            
        $sequence_4 = { 8bf0 8b4dfc ff15???????? 56 68???????? ffd3 83c408 }
                                                                                                
        $sequence_5 = { 488b4c2460 ff15???????? 488d0d730f0000 eb07 }
                                                            
        $sequence_6 = { 8b5604 83c40c 8d8d7cffffff 51 52 ff15???????? }
                                                                                    
        $sequence_7 = { ec 2b6359 e40c f6fb fd }
                                                                        
        $sequence_8 = { 486305ddd9ffff 488d0d9ad9ffff 4803c1 813850450000 75e3 b90b020000 }
                                                                                    
        $sequence_9 = { 4881c460020000 5e 5b 5d }
                                                            
        $sequence_10 = { ff15???????? 85c0 0f84ef000000 488d15a0b20000 }
                                                            
        $sequence_11 = { 33c0 6808020000 50 89442420 89442424 8944242c 89442430 }
                                                                                                
        $sequence_12 = { 5d c3 56 a3???????? 8d45f8 50 51 }
                                                                                                
        $sequence_13 = { a3???????? a1???????? c705????????bb454000 8935???????? a3???????? ff15???????? a3???????? }
                                                                                                
        $sequence_14 = { 4881ecd0040000 33f6 c744246800010000 488bf9 4889742460 }
                                                                        
        $sequence_15 = { eb13 488d0d1b0f0000 ff15???????? 8bc7 eb02 }
                                                                        
        $sequence_16 = { 8b11 8d45f4 50 8b45f8 6a00 }
                                                                        
        $sequence_17 = { 8b4dfc c70700000000 8b07 33cd 5e }
                                                                        
        $sequence_18 = { 8b07 83c404 8d5002 8d642400 668b08 }
                                                                        
        $sequence_19 = { 66c1c90a 0fb6c8 f9 85f5 }
                                                            
        $sequence_20 = { 8b3d???????? 03d9 8d4900 8b4304 83e808 d1e8 8d5308 }
                                                                                                
        $sequence_21 = { 3d31040000 7415 50 68???????? e8???????? 83c408 33ff }
                                                                                                
        $sequence_22 = { 488bcb e8???????? 03ff ebcc 85c0 7825 8b7b10 }
                                                                                                
        $sequence_23 = { 68e6ef209f 6687cb 0f98c3 8774243c 53 684608e44c 9c }
                                                                                                
        $sequence_24 = { e8???????? 488b4b08 488d542420 ff15???????? 8bd7 448bc0 8bc7 }
                                                                                                
        $sequence_25 = { 57 f361 634cea1c bc2cedefeb 59 }
                                                                        
        $sequence_26 = { 4889742428 4889442420 ff15???????? 8bd8 85c0 791c 488b4d77 }
                                                                                                
        $sequence_27 = { 8d642420 0f87ec150000 d2f0 29fb }
                                                            
        $sequence_28 = { 4c8d0d4dceffff 41f640387f 7528 3bc6 741e }
                                                                        
        $sequence_29 = { 68???????? 6a00 52 56 }
                                                            
        $sequence_30 = { 59 59 8b7508 8d34f518fc4000 391e }
                                                                        
        $sequence_31 = { c1f805 8bf7 83e61f c1e606 033485000c4100 c745e401000000 33db }
                                                                                                
        $sequence_32 = { c20400 6800040000 8d95acfbffff 53 52 }
                                                                        
        $sequence_33 = { 458bc7 488d0d487c0000 488b0cc1 488b442460 }
                                                            
        $sequence_34 = { 92 205232 3d5bf39362 f8 e2b2 bd2d145a68 }
                                                                                    
        $sequence_35 = { 53 56 488d6c24b9 4881ecd0000000 33d2 }
                                                                        
        $sequence_36 = { 488bc4 48897018 4c896020 55 }
                                                            
        $sequence_37 = { 9e af e329 b98820078f 46 }
                                                                        
        $sequence_38 = { ec 82303e f6dd 53 }
                                                            
        $sequence_39 = { 8bf0 c1fe05 c1e106 030cb5000c4100 eb02 8bca }
                                                                                    
    condition:
        7 of them and filesize < 1983488
}

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

43daf617-465f-4c97-90f7-acb56ed8a99c

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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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