win_bleachgap_auto

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

Detects win.bleachgap.

rule win_bleachgap_auto {

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

    


    strings:
        $sequence_0 = { e8???????? 83c40c 85c0 0f8431020000 837e2000 8bbe74040000 8daf4c010000 }
                                                                                                
        $sequence_1 = { c685affeffff27 c685b0feffff2e c685b1feffff2a c685b2feffff3b c685b3feffff3a c685b4feffff7f c685b5feffff7f }
                                                                                                
        $sequence_2 = { 8b407c 8b8860020000 ebd7 8b742410 83be7404000000 0f84e7f9ffff 8b467c }
                                                                                                
        $sequence_3 = { 8b4d0c 74c6 8b45f8 807f0d00 7407 8b30 83c604 }
                                                                                                
        $sequence_4 = { 8b4c2440 3bce 0f8cbd050000 8d046d02000000 3bc8 0f8cae050000 2bcd }
                                                                                                
        $sequence_5 = { 238798000000 33c8 894d18 8b8f9c000000 8b451c 23ce 57 }
                                                                                                
        $sequence_6 = { 8bd6 03d1 33c0 89542414 8bfe 2bd6 7411 }
                                                                                                
        $sequence_7 = { 5e c3 68b6040000 68???????? 6a44 686b020000 6a50 }
                                                                                                
        $sequence_8 = { e8???????? 8b6c2428 83c410 894500 85c0 0f8411010000 8b4604 }
                                                                                                
        $sequence_9 = { c645fc02 8b8d68ffffff 83f910 722f 8b9554ffffff 41 8bc2 }
                                                                                                
    condition:
        7 of them and filesize < 4538368
}

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

b532c0de-6f8d-40a6-880a-47295d63e497

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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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