win_hardrain_auto

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

Detects win.hardrain.

rule win_hardrain_auto {

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

    


    strings:
        $sequence_0 = { 83ec0c 8b4c2414 8b442410 56 57 8b7904 8b7004 }
                                                                                                
        $sequence_1 = { 5e 81c418010000 c20400 83ec0c }
                                                            
        $sequence_2 = { 83ec10 56 57 8b7c241c 6685ff }
                                                                        
        $sequence_3 = { 52 e8???????? 33c0 b910000000 89442448 }
                                                                        
        $sequence_4 = { 5e 83c418 c3 33c9 33c0 8b542424 894c2410 }
                                                                                                
        $sequence_5 = { c3 68ffffff7f 56 ff15???????? 85c0 }
                                                                        
        $sequence_6 = { 32d0 88143e 46 3bf3 7cea 5f 8d4c2408 }
                                                                                                
        $sequence_7 = { 52 8bce e8???????? 85c0 7413 6a16 8d44241c }
                                                                                                
        $sequence_8 = { e8???????? 50 8bce e8???????? 85c0 0f84da000000 }
                                                                                    
        $sequence_9 = { 5d b801000000 5b 59 c20400 8b4c2410 895910 }
                                                                                                
    condition:
        7 of them and filesize < 368640
}

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

6c3230fe-e355-4373-bdea-2f4ed1506f17

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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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