win_portstarter_auto

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

Detects win.portstarter.

rule win_portstarter_auto {

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

    


    strings:
        $sequence_0 = { 4c89cb 4c89c1 4c89d7 e8???????? 488d7301 488b542478 }
                                                                                    
        $sequence_1 = { 4c8b4110 4c8b4818 4d39c1 7c08 }
                                                            
        $sequence_2 = { 4c8b542440 4c89542458 c644243f00 488b942480000000 4c8b12 41ffd2 488b4c2450 }
                                                                                                
        $sequence_3 = { 4c89542450 4c89442448 4c89f8 4c89e3 4c89e9 e8???????? }
                                                                                    
        $sequence_4 = { 4c89c3 660f1f440000 4883f803 0f842c010000 }
                                                            
        $sequence_5 = { 4c89c3 4989c1 4889c8 4c89c9 0f1f440000 4883f80a 0f845e030000 }
                                                                                                
        $sequence_6 = { 4c8b442470 4c894718 833d????????00 750e }
                                                            
        $sequence_7 = { 4c8b542448 488b5c2468 48898424c0000000 4c89542448 4c89d1 e8???????? 488b542448 }
                                                                                                
        $sequence_8 = { 4863442430 486bc010 488d0de3061c00 4803c8 }
                                                            
        $sequence_9 = { 41b800de1b00 488d15d02f0000 488d4c2420 e8???????? }
                                                            
        $sequence_10 = { 4883ec48 8b442458 89442424 48c744242800000000 41b800de1b00 }
                                                                        
        $sequence_11 = { 488d0de3061c00 4803c8 488bc1 48634c2434 }
                                                            
    condition:
        7 of them and filesize < 14221312
}

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

b993a8ed-9303-4792-8231-1e45a30a96b6

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