win_xtunnel_auto

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

Detects win.xtunnel.

rule win_xtunnel_auto {

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

    


    strings:
        $sequence_0 = { 8a0c30 84c9 0f84fc010000 0fb6c9 }
                                                            
        $sequence_1 = { eb67 8b7740 0fb60e 8b97c0000000 c1e118 898aec000000 }
                                                                                    
        $sequence_2 = { 8d642400 8a540c64 88540702 8b442410 40 49 89442410 }
                                                                                                
        $sequence_3 = { 8a442430 8b4f58 888778010000 83c40c c7811c04000001000000 eb6d }
                                                                                    
        $sequence_4 = { 8b7d40 68???????? e8???????? 83c404 8944240c }
                                                                        
        $sequence_5 = { e8???????? 99 b960000000 f7f9 }
                                                            
        $sequence_6 = { 8a0b 43 84c9 75f9 2bda 81fbff000000 0f8fb7000000 }
                                                                                                
        $sequence_7 = { 8a542410 8a442414 8d7702 6a00 8d7e09 c60601 }
                                                                                    
        $sequence_8 = { 8a542414 8d5f09 880b 885301 8b7558 68???????? }
                                                                                    
        $sequence_9 = { 8b11 83c202 52 e8???????? }
                                                            
        $sequence_10 = { f7d8 1bc0 83e0fb 5f 5e 5b 8be5 }
                                                                                                
        $sequence_11 = { 895018 8b11 8910 8b5114 895014 }
                                                                        
        $sequence_12 = { 8d7340 8bc1 3b4e04 7405 3b510c }
                                                                        
        $sequence_13 = { 894804 0fb75608 66895008 8b4e18 }
                                                            
        $sequence_14 = { e8???????? 8bf8 83c404 897dec 33db 895dfc 3bfb }
                                                                                                
        $sequence_15 = { 03d2 52 51 50 e8???????? 834314fe 8b4310 }
                                                                                                
        $sequence_16 = { 33c4 89442410 56 6a06 6a01 }
                                                                        
        $sequence_17 = { c6421501 c645fc03 6a18 895e48 e8???????? }
                                                                        
        $sequence_18 = { e8???????? 83c404 8945b0 8b45b4 50 6a00 }
                                                                                    
        $sequence_19 = { 83c404 8bf0 e8???????? 99 b980969800 }
                                                                        
        $sequence_20 = { 83c404 b8feffffff e9???????? 8b45f0 }
                                                            
        $sequence_21 = { 83c404 8b55fc 8b4a04 8908 8b45fc }
                                                                        
        $sequence_22 = { 83c404 8bf0 8b4df8 51 e8???????? 83c404 8b10 }
                                                                                                
        $sequence_23 = { 83c404 8bf0 8b4dec 51 e8???????? 83c404 8a16 }
                                                                                                
    condition:
        7 of them and filesize < 4634440
}

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

6632c035-1c46-494b-a9a1-afb3311765e6

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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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