win_feodo_auto

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

Detects win.feodo.

rule win_feodo_auto {

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

    


    strings:
        $sequence_0 = { 83fa09 7704 8bca eb10 8d519f 83fa05 7717 }
                                                                                                
        $sequence_1 = { 6a00 6a02 6a04 68???????? }
                                                            
        $sequence_2 = { 0fafc7 83c601 03c1 0fbe0e 85c9 }
                                                                        
        $sequence_3 = { ff15???????? 8bf0 85f6 7507 53 ff15???????? 81c3f4010000 }
                                                                                                
        $sequence_4 = { 52 6a00 50 ff15???????? 8b0c24 }
                                                                        
        $sequence_5 = { 6a00 68???????? 56 ff15???????? f7d8 1bc0 f7d8 }
                                                                                                
        $sequence_6 = { 6a00 50 ff15???????? 8b0c24 51 ff15???????? }
                                                                                    
        $sequence_7 = { 6a06 6a01 6a02 ff15???????? 8bf0 83feff 741b }
                                                                                                
        $sequence_8 = { 7436 3d00010000 752f be04000000 eb28 3d00030000 }
                                                                                    
        $sequence_9 = { 83e800 7440 83e801 7422 83e801 7404 }
                                                                                    
    condition:
        7 of them and filesize < 270336
}

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

912877ac-6744-463a-9f41-f386eb4f730c

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