win_nightshade_c2_auto

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

Detects win.nightshade_c2.

rule win_nightshade_c2_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.nightshade_c2."
        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.nightshade_c2"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    


    strings:
        $sequence_0 = { 8bc1 89442438 eba1 837c243000 7f08 c744244401000000 488b4c2468 }
                                                                                                
        $sequence_1 = { ba02000000 488b8c24c0000000 e8???????? 4889442450 48837c245000 7505 e9???????? }
                                                                                                
        $sequence_2 = { 488bf8 33c0 b910000000 f3aa 48c744246000000000 48c744243000000000 }
                                                                                    
        $sequence_3 = { 5f c3 48894c2408 4883ec28 488b442430 48833800 7422 }
                                                                                                
        $sequence_4 = { e8???????? 837b1000 75dd 488d05c35f0100 483bd8 74d1 488bcb }
                                                                                                
        $sequence_5 = { 85c0 740a b801000000 e9???????? 488d0d5ceb0100 ff15???????? 85c0 }
                                                                                                
        $sequence_6 = { 488b4c2450 0fb6542424 881401 ebd8 }
                                                            
        $sequence_7 = { 4c8d0d46c40000 c5f35cca c4c173590cc1 4c8d0d15b40000 c5f359c1 c5fb101d???????? c5fb102d???????? }
                                                                                                
        $sequence_8 = { 488d8c24b0000000 e8???????? 4533c9 41b804010000 488d9424b0000000 488b4c2448 ff15???????? }
                                                                                                
        $sequence_9 = { 0f2e05???????? 7a06 0f84b4000000 f30f10442404 0f2e05???????? 7a06 0f849f000000 }
                                                                                                
    condition:
        7 of them and filesize < 458752
}

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

46f42f4a-18e1-4fdc-a4eb-24884b516193

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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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