win_bid_ransomware_auto

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

Detects win.bid_ransomware.

rule win_bid_ransomware_auto {

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

    


    strings:
        $sequence_0 = { 6a00 e8???????? ff75a8 e8???????? }
                                                            
        $sequence_1 = { 6800400000 6a40 e8???????? 0bc0 750c 68c8000000 }
                                                                                    
        $sequence_2 = { e8???????? c745942c000000 8d4594 50 ff75a8 6a00 6a08 }
                                                                                                
        $sequence_3 = { 757b ff05???????? c705????????20202020 68???????? ff35???????? e8???????? }
                                                                                    
        $sequence_4 = { ff75b0 e8???????? 6a04 ff75a8 6a04 6a00 }
                                                                                    
        $sequence_5 = { 68dc050000 ff75a8 68???????? e8???????? 6a00 }
                                                                        
        $sequence_6 = { ff75a8 6a03 6a00 ff7590 ff75b0 e8???????? ff75b0 }
                                                                                                
        $sequence_7 = { d1e0 83e806 c6043000 8d85d8fdffff }
                                                            
        $sequence_8 = { c1e005 0345e8 83780c01 740c 6a00 8d00 }
                                                                                    
        $sequence_9 = { ff75f0 6a40 e8???????? 0bc0 750c 68c8000000 e8???????? }
                                                                                                
    condition:
        7 of them and filesize < 57344
}

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

f4c3bd73-6332-41e9-9d55-4c8c6281d58c

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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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