win_ncctrojan_auto

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

Detects win.ncctrojan.

rule win_ncctrojan_auto {

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

    


    strings:
        $sequence_0 = { 7536 8b85e8feffff 85c0 750a 68???????? e9???????? }
                                                                                    
        $sequence_1 = { 68???????? e9???????? 83f801 750a 68???????? }
                                                                        
        $sequence_2 = { 1bc0 83c801 85c0 0f8437040000 f644241010 8d44243c }
                                                                                    
        $sequence_3 = { 8d85c4bfffff 50 8d85c07fffff 6800400000 50 e8???????? 83c40c }
                                                                                                
        $sequence_4 = { 8b4c240c 8d5102 0f1f00 668b01 83c102 }
                                                                        
        $sequence_5 = { 8d45e4 8d4e01 51 6a14 }
                                                            
        $sequence_6 = { 83c102 6685c0 75f5 2bca d1f9 6683bc4deafdffff5c }
                                                                                    
        $sequence_7 = { e8???????? 68???????? 8d85e8adffff 6800400000 50 e8???????? 83c440 }
                                                                                                
        $sequence_8 = { 85d2 7e10 8ac1 02c9 2480 }
                                                                        
        $sequence_9 = { 6a00 50 c645fc02 e8???????? 8945e4 83c40c }
                                                                                    
        $sequence_10 = { 85db 0f84b8000000 6a14 59 }
                                                            
        $sequence_11 = { 8b542408 8d420c 8b8a2cf8ffff 33c8 e8???????? 8b4afc }
                                                                                    
        $sequence_12 = { 8b542408 8d420c 8b8a0cfefeff 33c8 }
                                                            
        $sequence_13 = { 50 e8???????? 8b4d08 e8???????? e9???????? 83ec18 }
                                                                                    
        $sequence_14 = { 6a00 50 e8???????? 0fb745b8 }
                                                            
        $sequence_15 = { 55 8bec ff7508 e8???????? cc 6a00 }
                                                                                    
    condition:
        7 of them and filesize < 1160192
}

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

ff4caccb-0437-4bd4-9bb2-78fd58445dff

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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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