win_fickerstealer_auto

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

Detects win.fickerstealer.

rule win_fickerstealer_auto {

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

    


    strings:
        $sequence_0 = { 56 83ec10 8b4d1c 8b4508 8b5d18 8b5514 f6c140 }
                                                                                                
        $sequence_1 = { e8???????? 83c40c f20f10842480000000 f20f108c2488000000 8b442404 8b542410 89f9 }
                                                                                                
        $sequence_2 = { c1e917 8d4181 83f81e 760d c1ea1f 81c2ffffff7f 89d0 }
                                                                                                
        $sequence_3 = { f20f10842400010000 31ff 899424e4000000 89442410 8b842408010000 f20f1101 f20f1084240c010000 }
                                                                                                
        $sequence_4 = { c744247c00000000 6a08 58 89442424 e9???????? 31d2 8d9c24a0010000 }
                                                                                                
        $sequence_5 = { 894604 31c0 8906 83c430 5e 5f 5b }
                                                                                                
        $sequence_6 = { 741e 8d5670 8d8c24480b0000 56 e8???????? 59 4b }
                                                                                                
        $sequence_7 = { 894d90 89d9 89461c 56 e8???????? 58 8b45e4 }
                                                                                                
        $sequence_8 = { 31f6 39f0 7409 8a1c31 881c32 46 ebf3 }
                                                                                                
        $sequence_9 = { ff750c 53 e8???????? 83c410 89c1 8955f0 0faff8 }
                                                                                                
    condition:
        7 of them and filesize < 598016
}

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

938c00f8-f94c-4ea6-8693-505678ad25c7

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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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