win_darkcloud_auto

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

Detects win.darkcloud.

rule win_darkcloud_auto {

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

    


    strings:
        $sequence_0 = { 8d8df0feffff ff15???????? 8d95a0feffff 52 8d85b0feffff 50 6a02 }
                                                                                                
        $sequence_1 = { 6a03 ff15???????? 83c410 c745fc33000000 ba???????? 8d8df0feffff ff15???????? }
                                                                                                
        $sequence_2 = { 52 6a02 ff15???????? 83c40c 8d4d80 ff15???????? c745fc1e000000 }
                                                                                                
        $sequence_3 = { 52 50 ff15???????? 8d4de0 8d55e8 51 }
                                                                                    
        $sequence_4 = { 83e104 85c9 7409 8d4dd0 ff15???????? 8d55bc 52 }
                                                                                                
        $sequence_5 = { 730c c78570fdffff00000000 eb0c ff15???????? 898570fdffff 8b95fcfeffff c1e204 }
                                                                                                
        $sequence_6 = { 50 51 6a02 ff15???????? 83c40c 6639bd5cffffff 741e }
                                                                                                
        $sequence_7 = { 8b9564fdffff 8d8decfeffff ff15???????? c785d8fdffff04000000 83bdd8fdffff12 730c c785d4fcffff00000000 }
                                                                                                
        $sequence_8 = { eb0c ff15???????? 8985f8fdffff 8b8df0feffff 8b957cffffff 8d048a 898504ffffff }
                                                                                                
        $sequence_9 = { e8???????? 8bd0 8d4ddc ff15???????? c745fc10000000 8b4d94 }
                                                                                    
    condition:
        7 of them and filesize < 622592
}

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

4dab5fd8-57f2-44a9-818d-9608034a6810

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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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