win_mulcom_auto

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

Detects win.mulcom.

rule win_mulcom_auto {

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

    


    strings:
        $sequence_0 = { 7596 b9e8000000 e8???????? 488bf8 4889442430 488d4818 ff15???????? }
                                                                                                
        $sequence_1 = { 488bf9 4885db 0f849c000000 488b7108 483bde 7433 488d4b68 }
                                                                                                
        $sequence_2 = { 4889442430 488d4818 ff15???????? 488d4f40 ff15???????? 44897768 4c897770 }
                                                                                                
        $sequence_3 = { 4885d2 7408 488b4650 8b08 eb02 33c9 4863c1 }
                                                                                                
        $sequence_4 = { 4d85f6 7460 41832600 498b4e08 4885c9 7412 41837e1000 }
                                                                                                
        $sequence_5 = { 48837dd010 4c0f4345b8 40887c2428 4c89642420 448bc9 488b542430 488b0d???????? }
                                                                                                
        $sequence_6 = { 423a840ac4870400 0f85c8000000 48ff4310 48837b0800 488b4310 7406 }
                                                                                    
        $sequence_7 = { 0f11459f 0f104810 0f114daf 4c896010 48c740180f000000 448820 4c8bc7 }
                                                                                                
        $sequence_8 = { 48c1f803 4885c0 7410 488d41f8 488b38 488905???????? eb1b }
                                                                                                
        $sequence_9 = { eb03 40b701 488bce ff15???????? 488bcd ff15???????? 408ac7 }
                                                                                                
    condition:
        7 of them and filesize < 867328
}

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

d054c9c1-07dd-488c-999c-d7744b0723d8

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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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