win_grillmark_auto

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

Detects win.grillmark.

rule win_grillmark_auto {

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

    


    strings:
        $sequence_0 = { ff15???????? 8d8568fcffff 50 6802020000 e8???????? 85c0 7408 }
                                                                                                
        $sequence_1 = { 7413 80f922 7506 8065ff00 }
                                                            
        $sequence_2 = { 53 53 57 68???????? ebaa }
                                                                        
        $sequence_3 = { 83c004 83c104 8d1406 3b5510 72d6 5e 5d }
                                                                                                
        $sequence_4 = { 33c0 e9???????? 50 e8???????? 59 8945fc }
                                                                                    
        $sequence_5 = { 8b35???????? 83c40c 85c0 7410 }
                                                            
        $sequence_6 = { 50 8d85bcf8ffff 50 e8???????? 83c430 }
                                                                        
        $sequence_7 = { 895df4 f3ab 66ab aa 895df8 c745fc20000000 }
                                                                                    
        $sequence_8 = { 56 8d8590deffff 53 50 }
                                                            
        $sequence_9 = { 55 8bec 51 53 57 33ff 68???????? }
                                                                                                
    condition:
        7 of them and filesize < 212992
}

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

0a3dc1be-b8fb-488f-b80f-2742720ca97d

Propose edits, view related rules, and engage with the community through comments.

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 ]]

Community Discussion