win_ravenstealer_auto

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

Detects win.ravenstealer.

rule win_ravenstealer_auto {

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

    


    strings:
        $sequence_0 = { ba04010000 488d8c24c00e0000 e8???????? 40b601 e9???????? e8???????? 0fbed8 }
                                                                                                
        $sequence_1 = { 740a c744247c09000000 eb5a 0fbe05???????? 4103c1 4103c2 0fbe0d???????? }
                                                                                                
        $sequence_2 = { 662bd0 664103d7 4863442430 664189544602 e8???????? 0fbec0 89842480000000 }
                                                                                                
        $sequence_3 = { b301 e9???????? e8???????? 0fbed8 e8???????? 0fbec8 0fafcb }
                                                                                                
        $sequence_4 = { 7435 0fbe05???????? 33d2 0fbe0d???????? 4103c1 f7f1 0fbe0d???????? }
                                                                                                
        $sequence_5 = { 899424c0000000 48c7c6ffffffff 0f1f4000 48ffc6 4238142e 75f7 488b01 }
                                                                                                
        $sequence_6 = { 33c0 8885b00c0000 0f1003 0f1101 0f104b10 0f114910 f3440f7fb558070000 }
                                                                                                
        $sequence_7 = { 75e5 482bf7 48d1fe 0f57c0 0f11842480000000 4c89bc2490000000 4c89bc2498000000 }
                                                                                                
        $sequence_8 = { eb07 4c8b95b00c0000 f20f1035???????? 41803a00 0f8531120000 89b5b00c0000 8b85b00c0000 }
                                                                                                
        $sequence_9 = { 0f1100 660f6f0d???????? f30f7f8d78040000 41b820000000 488d15b2602600 488d8d68040000 e8???????? }
                                                                                                
    condition:
        7 of them and filesize < 8337408
}

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

9b8296a3-2f1f-4333-a277-c725850a795e

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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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