win_medusa_auto

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

Detects win.medusa.

rule win_medusa_auto {

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

    


    strings:
        $sequence_0 = { 83c408 8bcf e8???????? 84c0 741f 8d45cc }
                                                                                    
        $sequence_1 = { a1???????? c745f4494b677d 3b8104000000 7e48 68???????? e8???????? 83c404 }
                                                                                                
        $sequence_2 = { 8d45f4 64a300000000 8bf1 8b5d08 8d7e14 57 e8???????? }
                                                                                                
        $sequence_3 = { e8???????? 56 ffb528dbffff 8d8558dbffff 6a01 50 e8???????? }
                                                                                                
        $sequence_4 = { 80f90a 7504 880e eb11 c6060d 8b0495a86c4900 884c382a }
                                                                                                
        $sequence_5 = { eb15 85c0 7504 85c9 740d 8a8044984700 8806 }
                                                                                                
        $sequence_6 = { eb18 8bbd7cfcffff 8bb578fcffff ebb3 8938 897004 894704 }
                                                                                                
        $sequence_7 = { bf01000000 8b4d1c beff030000 390b 0f8419010000 8b5508 0fb708 }
                                                                                                
        $sequence_8 = { 64a100000000 50 51 53 81ecc8040000 a1???????? 33c5 }
                                                                                                
        $sequence_9 = { 895dfc 33f6 c745f800000000 c7451800000000 eb4e 8bc1 81f9f0000000 }
                                                                                                
    condition:
        7 of them and filesize < 1386496
}

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

68fddc0d-811c-4d92-b336-cf28e29a869b

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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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