win_velso_auto

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

Detects win.velso.

rule win_velso_auto {

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

    


    strings:
        $sequence_0 = { ba37000000 893424 89e8 e8???????? 8b4c2420 890424 ba36000000 }
                                                                                                
        $sequence_1 = { 8b4da0 c745a803000000 e8???????? 8b45a0 83ec10 8b00 e9???????? }
                                                                                                
        $sequence_2 = { 8b542438 2b54243c c1e005 01d0 dd542428 85c0 dd442410 }
                                                                                                
        $sequence_3 = { e8???????? 8b13 85f6 7423 8b442440 83fe01 8d0c42 }
                                                                                                
        $sequence_4 = { 7704 c6459800 8b4d08 0fb65d98 085da1 01c6 11d7 }
                                                                                                
        $sequence_5 = { e9???????? 89442418 89e8 e8???????? 8b4c2418 890424 }
                                                                                    
        $sequence_6 = { e8???????? 85c0 0f84b6fdffff 2b857cffffff 8d50fa 83f810 0f4dc2 }
                                                                                                
        $sequence_7 = { ff5030 83ec08 3945c4 0fb655d0 7523 8b4dc8 8b06 }
                                                                                                
        $sequence_8 = { 8b4030 894330 8b4210 3d???????? 0f85a1030000 8d45e8 894588 }
                                                                                                
        $sequence_9 = { 83c801 884320 a1???????? 85c0 0f8481010000 890424 e8???????? }
                                                                                                
    condition:
        7 of them and filesize < 1736704
}

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

39702b41-9d3c-4718-95d5-d26e9dbfdcf9

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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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