win_stealc_auto

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

Detects win.stealc.

rule win_stealc_auto {

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

    


    strings:
        $sequence_0 = { e8???????? e8???????? 81c480000000 e9???????? }
                                                            
        $sequence_1 = { e8???????? 83c460 e8???????? 83c40c }
                                                            
        $sequence_2 = { 50 e8???????? e8???????? 81c484000000 }
                                                            
        $sequence_3 = { ff15???????? 85c0 7507 c685e0feffff43 }
                                                            
        $sequence_4 = { 68???????? e8???????? e8???????? 83c474 }
                                                            
        $sequence_5 = { e8???????? e8???????? 83c418 6a3c }
                                                            
        $sequence_6 = { 8d85dcf7ffff 50 ff15???????? 85c0 0f84a1000000 }
                                                                        
        $sequence_7 = { 69c90ba31400 2bca 884c0588 48ffc0 }
                                                            
        $sequence_8 = { 8d85dcf7ffff 50 8b450c 53 ff30 895df0 }
                                                                                    
        $sequence_9 = { 69c10ba31400 894d80 2bc2 66894584 69c187fd701e }
                                                                        
        $sequence_10 = { 4c8be0 440fb6458e 440fb64d8d 440fb6558c 440fb65d8b }
                                                                        
        $sequence_11 = { 66894584 69c187fd701e b934eddb95 2bc8 }
                                                            
        $sequence_12 = { 440fb77586 440fb77d84 894c2470 498bcc 4489442468 }
                                                                        
        $sequence_13 = { 0fb67d89 0fb67588 440fb77586 440fb77d84 }
                                                            
        $sequence_14 = { e8???????? 0fb64d8f 4c8be0 440fb6458e }
                                                            
        $sequence_15 = { ff15???????? 85c0 750a b043 }
                                                            
        $sequence_16 = { e8???????? e8???????? 83c47c e9???????? }
                                                            
        $sequence_17 = { 8bcc 8d95a0f5ffff 52 e8???????? e8???????? 83c414 }
                                                                                    
    condition:
        7 of them and filesize < 4891648
}

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

7731a2bc-caa8-4b6d-9a34-a3882ab5b488

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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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