win_warmcookie_auto

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

Detects win.warmcookie.

rule win_warmcookie_auto {

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

    


    strings:
        $sequence_0 = { c744242880000000 c744242003000000 41b900000000 41b807000000 ba00000080 }
                                                                        
        $sequence_1 = { 41b902000000 41b800000000 ba00000000 4889c1 }
                                                            
        $sequence_2 = { 899c2498000000 488d5e02 48896c2470 8944242c 48b8fffffffffdffffff 4889842480000000 31c0 }
                                                                                                
        $sequence_3 = { 83e830 6683f809 0f8709060000 4183fe03 }
                                                            
        $sequence_4 = { 415c c3 55 4157 4156 4155 }
                                                                                    
        $sequence_5 = { 4181f80080ffff 7470 8b4c2448 4889c2 }
                                                            
        $sequence_6 = { 0f8e1bffffff 01d0 89430c e9???????? 4157 4156 }
                                                                                    
        $sequence_7 = { e8???????? 3dff2f0000 0f97c0 0fb6c0 }
                                                            
        $sequence_8 = { ba19000000 488b4c2438 ff15???????? 85c0 }
                                                            
        $sequence_9 = { ff5010 b9e8030000 ff15???????? 83ef01 }
                                                            
        $sequence_10 = { 85c0 7409 488b442428 48c1e814 }
                                                            
        $sequence_11 = { 488d4c0301 4801c9 e8???????? 4889c3 4885c0 }
                                                                        
        $sequence_12 = { ff15???????? 25ff0f0000 8d88b80b0000 ff15???????? }
                                                            
        $sequence_13 = { ba18000000 4889c1 ffd3 85c0 }
                                                            
        $sequence_14 = { 488b01 ff9080000000 85c0 7815 }
                                                            
        $sequence_15 = { 6642837c40fe00 75f3 4b8d1c00 4889d9 e8???????? 4989d8 }
                                                                                    
        $sequence_16 = { 4889e8 f0480fb13b 4885c0 75e2 488b3d???????? 31ed }
                                                                                    
        $sequence_17 = { 488d542470 b901010000 ff15???????? 85c0 }
                                                            
        $sequence_18 = { 488b5c2460 8d4801 e8???????? 4c8bf8 }
                                                            
        $sequence_19 = { ff15???????? 488be8 4883f8ff 7444 4533c9 }
                                                                        
        $sequence_20 = { 4b8d040b 4688441102 483d00010000 72c8 488b5c2408 488b742410 }
                                                                                    
        $sequence_21 = { 83f805 7c34 e8???????? 83f804 720c e8???????? 3d000f0000 }
                                                                                                
        $sequence_22 = { ff15???????? 85c0 75c2 85f6 740f }
                                                                        
        $sequence_23 = { 8bcf 498bd6 4803ce e8???????? 897e20 }
                                                                        
    condition:
        7 of them and filesize < 331776
}

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

aed46e68-6438-4b52-9943-0c40d5d67ef6

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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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