win_subzero_auto

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

Detects win.subzero.

rule win_subzero_auto {

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

    


    strings:
        $sequence_0 = { e8???????? 498bd4 488bcb 488bc7 ff15???????? 8bd8 85c0 }
                                                                                                
        $sequence_1 = { 488b4c2440 488b01 488b4010 ff15???????? 85ff 780c 488b442430 }
                                                                                                
        $sequence_2 = { 488b02 488b98a8000000 488dbba0000000 488bcf 48ff15???????? 0f1f440000 48897c2430 }
                                                                                                
        $sequence_3 = { 8bfa 488bd9 c78194000000010000c0 488b4960 33f6 4885c9 7411 }
                                                                                                
        $sequence_4 = { 4d8bf4 4d2bf7 49c1fe03 4d85ff 0f8541fc0200 488d04f3 48894710 }
                                                                                                
        $sequence_5 = { 8bd8 85c0 7833 48832600 4c8d1554ef0300 498bd2 498bca }
                                                                                                
        $sequence_6 = { 488d05b35c0500 488907 4885c9 740d 488b01 488b4008 ff15???????? }
                                                                                                
        $sequence_7 = { e8???????? 90 e9???????? 448bcb bad7090000 488b4c2468 4c8d05d7150300 }
                                                                                                
        $sequence_8 = { c6401801 498b4308 488b4808 c6411800 498b4308 488b5008 488b4a10 }
                                                                                                
        $sequence_9 = { 498d4be8 498943f0 e8???????? 8bd8 85c0 0f883c6d0300 33c0 }
                                                                                                
    condition:
        7 of them and filesize < 1420288
}

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

4a73f091-38bc-4e89-9fdc-59a9eacb5f28

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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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