win_unidentified_091_auto

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

Detects win.unidentified_091.

rule win_unidentified_091_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.unidentified_091."
        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.unidentified_091"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    


    strings:
        $sequence_0 = { 488d4101 480f43c1 498b4e28 4803f8 448bc9 483bf8 490f43db }
                                                                                                
        $sequence_1 = { c3 41b89d000000 488d1598910c00 488bcf e8???????? 488b7c2440 b801000000 }
                                                                                                
        $sequence_2 = { 4c8bc6 e8???????? 41bcc0000000 0f1f00 4c8b842488000000 488d5310 488bcb }
                                                                                                
        $sequence_3 = { e8???????? 488b4b18 e8???????? 488b4b30 488d15788f1100 41b86b000000 e8???????? }
                                                                                                
        $sequence_4 = { d3e8 49895708 41894718 0fb60a 83e10f 4a0fbe840108841d00 428a8c0118841d00 }
                                                                                                
        $sequence_5 = { 7433 498b54cd18 4d8bc6 488b4d18 e8???????? 4c8d05ab311200 85c0 }
                                                                                                
        $sequence_6 = { c1e017 0bc1 89442404 8bca c1e916 8bc2 83e11f }
                                                                                                
        $sequence_7 = { 85c0 0f845f010000 4533c0 488d542440 488bce e8???????? 85c0 }
                                                                                                
        $sequence_8 = { 8d0c03 488b442448 803c0100 0f854b020000 c6040101 8b0c8f 3bce }
                                                                                                
        $sequence_9 = { 8b94b3b07b2500 448b848bb0772500 428b8c93b07f2500 42338c8bb0832500 4133c8 33ca 334c2420 }
                                                                                                
    condition:
        7 of them and filesize < 5777408
}

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

97e8cf09-e755-4e8a-8815-3edc32d7d22b

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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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