win_jelus_rat_auto

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

Detects win.jelus_rat.

rule win_jelus_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.jelus_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.jelus_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 = { e8???????? 90 488d4d8f e8???????? 488b4d87 4885c9 7411 }
                                                                                                
        $sequence_1 = { 8bf0 488b8118040000 488bcf ff15???????? 488b0f 488b81e0020000 488bcf }
                                                                                                
        $sequence_2 = { e9???????? 4883ec28 33d2 488d0d176b2800 e8???????? 8325????????00 488d0584721d00 }
                                                                                                
        $sequence_3 = { e8???????? 90 4533e4 4885f6 7466 4d85f6 7461 }
                                                                                                
        $sequence_4 = { ff15???????? 90 e8???????? 488b4808 e8???????? 90 488b07 }
                                                                                                
        $sequence_5 = { c3 4053 55 56 57 4883ec38 498b01 }
                                                                                                
        $sequence_6 = { d1f8 4c8d542430 4863c8 4c8d1d80c01b00 480fafca 4803d2 4d8d144a }
                                                                                                
        $sequence_7 = { ffc6 48ffc3 4863c6 488d4afd 483bc1 7cc7 488b5c2430 }
                                                                                                
        $sequence_8 = { ff15???????? 8905???????? 4883c428 c3 4883ec28 ba01000000 488d0dc4682800 }
                                                                                                
        $sequence_9 = { e8???????? 488bc3 488b5c2430 4883c420 5f c3 488d0511501800 }
                                                                                                
    condition:
        7 of them and filesize < 6474752
}

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

d6803563-4b22-4798-bf74-5377833f06e5

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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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