win_exaramel_auto

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

Detects win.exaramel.

rule win_exaramel_auto {

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

    


    strings:
        $sequence_0 = { 660fd60f 8d7f08 8b048d74404100 ffe0 f7c703000000 7413 8a06 }
                                                                                                
        $sequence_1 = { e8???????? 8bc7 83c404 8b4dfc 5f 33cd }
                                                                                    
        $sequence_2 = { ff15???????? 85c0 746d 53 57 ff75fc 8b3d???????? }
                                                                                                
        $sequence_3 = { ff15???????? 68???????? 8d852cf8ffff 50 ffb528f8ffff e8???????? }
                                                                                    
        $sequence_4 = { 68???????? 68???????? 68???????? 8d45fc 50 8d45b8 }
                                                                                    
        $sequence_5 = { e8???????? 83c408 8bf0 ff7704 ff15???????? 85f6 7414 }
                                                                                                
        $sequence_6 = { c1f806 6bc930 8b048560dd4100 f644082801 7406 8b440818 5d }
                                                                                                
        $sequence_7 = { 83c410 ba03010000 85c0 0f44ca 8bc1 }
                                                                        
        $sequence_8 = { 56 e8???????? 83c408 85c0 7429 ffb5f0fdffff e8???????? }
                                                                                                
        $sequence_9 = { 6a03 68???????? e8???????? 8145e800403d7f 8d45e8 8155ec5b020000 }
                                                                                    
    condition:
        7 of them and filesize < 294912
}

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

d780d35b-6c41-4cab-bdc7-dc6f3d5a97c2

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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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