win_wm_rat_auto

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

Detects win.wm_rat.

rule win_wm_rat_auto {

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

    


    strings:
        $sequence_0 = { 6a00 ffd6 8d942490020000 52 6802010000 ff15???????? 85c0 }
                                                                                                
        $sequence_1 = { 8db4247c0d0000 e8???????? 83c41c 84c0 0f8489000000 83bc24780d000010 8b8424640d0000 }
                                                                                                
        $sequence_2 = { 50 8d84242c050000 898c242c050000 e8???????? 8d542418 c684247c31020028 8b8c2424050000 }
                                                                                                
        $sequence_3 = { 51 dd15???????? e8???????? 8b35???????? 50 ffd6 83c40c }
                                                                                                
        $sequence_4 = { 8d8c247c010000 ff15???????? 8d942494010000 52 8d8c247c010000 ff15???????? }
                                                                                    
        $sequence_5 = { 8944242c 89442414 a1???????? c744240c00000000 c744241801000000 c744241c06000000 7305 }
                                                                                                
        $sequence_6 = { bf10000000 393d???????? 7305 be???????? 6a00 6800040000 }
                                                                                    
        $sequence_7 = { 8d8c24f00d0000 ff15???????? 6a1a 83ec1c 8bd4 c784249c31020046000000 89642454 }
                                                                                                
        $sequence_8 = { a3???????? ff15???????? 85c0 7427 8b0d???????? 51 }
                                                                                    
        $sequence_9 = { 83c420 8d480c 83caff f00fc111 4a 85d2 }
                                                                                    
    condition:
        7 of them and filesize < 258048
}

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

8bbe4327-1dd3-4af0-9c5b-60320bbf6c5d

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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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