win_cycbot_auto

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

Detects win.cycbot.

rule win_cycbot_auto {

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

    


    strings:
        $sequence_0 = { 56 6a01 8d8d34ffffff c645fc01 e8???????? ff15???????? 8b8b9c0e0000 }
                                                                                                
        $sequence_1 = { 56 e8???????? 8bf8 59 85ff 741b ff75ec }
                                                                                                
        $sequence_2 = { be???????? 8d7d98 f3a5 6a0a 59 be???????? 8d7dc4 }
                                                                                                
        $sequence_3 = { 0f84b7000000 0185d8eeffff 03f8 80bde3eeffff00 7571 8b06 68???????? }
                                                                                                
        $sequence_4 = { 85c0 744a 50 57 ffd6 0fbe05???????? }
                                                                                    
        $sequence_5 = { 85c0 0f84b1010000 50 8b8540f9ffff e8???????? 8b15???????? }
                                                                                    
        $sequence_6 = { 84d2 75f9 2b4514 49 51 8b4d08 8d4c0f01 }
                                                                                                
        $sequence_7 = { b8???????? e8???????? 8b4508 8945c4 8b450c 6a0f 8945ec }
                                                                                                
        $sequence_8 = { 8d8584fbffff 50 68???????? e8???????? 8bf0 83c414 3bf3 }
                                                                                                
        $sequence_9 = { 8b85bcfdffff 33ff 47 8985e8feffff 8b4510 899dc8fdffff 89bdccfeffff }
                                                                                                
    condition:
        7 of them and filesize < 1163264
}

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

50ae4eb9-f82c-431d-86e4-8e21a639f0b5

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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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