win_breach_rat_auto

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

Detects win.breach_rat.

rule win_breach_rat_auto {

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

    


    strings:
        $sequence_0 = { 898548ffffff 8d4608 660fd68550ffffff c78540ffffff03000000 c78544ffffff01000000 c78554ffffff01000000 }
                                                                                    
        $sequence_1 = { 8945e4 c745c000000000 c745c4ffffffff c745c800000000 c745bcccfa4300 c745cc00000000 c745d000000000 }
                                                                                                
        $sequence_2 = { 8d4d94 0f4345d8 50 e8???????? }
                                                            
        $sequence_3 = { e8???????? 8d8dd4f5ffff c745fcffffffff e8???????? 68???????? }
                                                                        
        $sequence_4 = { 897dec 8b8684000000 6a00 6a00 40 50 ffb680000000 }
                                                                                                
        $sequence_5 = { 68???????? ff75d0 51 8d4dc0 e8???????? 85c0 7533 }
                                                                                                
        $sequence_6 = { e8???????? 8d45dc c745fc0b000000 50 8bce e8???????? 6a02 }
                                                                                                
        $sequence_7 = { 83c102 6685c0 75f5 2bca d1f9 837de000 }
                                                                                    
        $sequence_8 = { 68???????? 8d8d4cf9ffff e8???????? 68???????? 8d854cf9ffff c745fc7b000000 50 }
                                                                                                
        $sequence_9 = { ebe6 8b45ec 898680000000 c645dc00 8b7de4 8bce 57 }
                                                                                                
    condition:
        7 of them and filesize < 645120
}

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

dfee75fe-1a17-41a8-a1d6-d2850f44a48c

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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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