win_fatduke_auto

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

Detects win.fatduke.

rule win_fatduke_auto {

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

    


    strings:
        $sequence_0 = { ff4818 8b4818 8b401c 8a0401 8bcf 8845f0 ff75f0 }
                                                                                                
        $sequence_1 = { c745e800000000 8bc3 8b4df4 64890d00000000 59 5f 5e }
                                                                                                
        $sequence_2 = { ffb424e8000000 e8???????? 83c404 33c0 c78424fc00000007000000 c78424f800000000000000 66898424e8000000 }
                                                                                                
        $sequence_3 = { e8???????? 83c404 33c0 c78424dc00000007000000 c78424d800000000000000 66898424c8000000 eb04 }
                                                                                                
        $sequence_4 = { c6460401 ff742418 8bce e8???????? 84c0 0f8465feffff 8b5c2438 }
                                                                                                
        $sequence_5 = { ff7304 50 e8???????? ff33 e8???????? 83c404 8b4dec }
                                                                                                
        $sequence_6 = { eb19 8b45f0 8b5de8 8b55f0 3bc3 7305 83c8ff }
                                                                                                
        $sequence_7 = { c783980100000f000000 c7839401000000000000 c6838401000000 c645fc0e 83bb8001000010 720e ffb36c010000 }
                                                                                                
        $sequence_8 = { ff742420 8d44241c ff7510 ff750c 50 ff742434 e8???????? }
                                                                                                
        $sequence_9 = { 8d7c2440 8a07 3c7f 744b 84c0 7e47 8b4c2410 }
                                                                                                
    condition:
        7 of them and filesize < 9012224
}

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

d3e2ab8c-a9af-4a9f-9eaa-6750b7c53a08

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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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