win_meduza_auto

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

Detects win.meduza.

rule win_meduza_auto {

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

    


    strings:
        $sequence_0 = { 7424 6a0d eb19 8b0c9d70884a00 8a443928 a840 7508 }
                                                                                                
        $sequence_1 = { c745fc05000000 8b0d???????? 8b4904 8b8970924a00 85c9 7405 8b11 }
                                                                                                
        $sequence_2 = { 8d7e90 8b4004 c74430906cea4900 8b07 8b4804 8d4190 8944318c }
                                                                                                
        $sequence_3 = { e8???????? 8d8d78fcffff c645fc1f e8???????? 83ec10 8d8d98feffff 8bf4 }
                                                                                                
        $sequence_4 = { c785dcf6ffff7b4c4a4f 8b85d8f6ffff 8b8ddcf6ffff 8985a8f0ffff 898dacf0ffff c785d8f6ffff0a664eff }
                                                                                    
        $sequence_5 = { e9???????? 8d8df0feffff e9???????? 8d8d68faffff e9???????? 8d8d38faffff e9???????? }
                                                                                                
        $sequence_6 = { 668908 c645bc01 eb57 807dbc00 7451 8b4db8 83f908 }
                                                                                                
        $sequence_7 = { 75f9 2bca 8d85b0f4ffff 51 50 8d8d54eeffff e8???????? }
                                                                                                
        $sequence_8 = { 898560edffff 898d64edffff c785d8e4ffffdc70e11a c785dce4fffff74b9182 8b85d8e4ffff 8b8ddce4ffff 898568edffff }
                                                                                                
        $sequence_9 = { e9???????? 807e0800 8b0f 8b01 8b4004 740e 6a04 }
                                                                                                
    condition:
        7 of them and filesize < 1433600
}

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

3fd1caf5-9e3d-4dbd-837c-9b9ed8a5c259

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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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