win_nvisospit_auto

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

Detects win.nvisospit.

rule win_nvisospit_auto {

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

    


    strings:
        $sequence_0 = { 0f8e16010000 85d2 0f8493010000 b9???????? 81f9???????? 7384 }
                                                                                    
        $sequence_1 = { 8d95a2f9ffff 89542420 8d95a4f9ffff 8954241c 8d95acfbffff 89542418 }
                                                                                    
        $sequence_2 = { 8d1c76 c1e302 01d8 897808 c70000000000 }
                                                                        
        $sequence_3 = { 8b8000004000 83fb10 8db900004000 8945c4 0f849d000000 83fb20 }
                                                                                    
        $sequence_4 = { 8b7104 85f6 0f85dffeffff 8b4108 }
                                                            
        $sequence_5 = { 8d9da4f9ffff 81c307010000 895c2414 8d9da4f9ffff }
                                                            
        $sequence_6 = { 8b55d4 8954240c c7442408???????? c744240400000000 890424 }
                                                                        
        $sequence_7 = { c78594f9ffff01000000 66c78592f9ffff0000 c6857df9ffff4d c6857ef9ffff4d c6857ff9ffff4b 8b45dc }
                                                                                    
        $sequence_8 = { 81c307010000 895c2414 8d9da4f9ffff 83c306 895c2410 894c240c 89542408 }
                                                                                                
        $sequence_9 = { ffd0 83ec04 c70424???????? e8???????? 8b4304 }
                                                                        
    condition:
        7 of them and filesize < 66560
}

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

793a3eca-0c73-4308-b993-66afecb855e5

Propose edits, view related rules, and engage with the community through comments.

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 ]]

Community Discussion