win_temp_stealer_auto

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

Detects win.temp_stealer.

rule win_temp_stealer_auto {

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

    


    strings:
        $sequence_0 = { 488b09 ff15???????? 488bd8 488d1539b00300 488bc8 ff15???????? 488985f8040000 }
                                                                                                
        $sequence_1 = { e8???????? 488b0f 4885c9 7426 488d59f8 4d8bcd 4c8b03 }
                                                                                                
        $sequence_2 = { 4055 4883ec20 488bea b810000000 48f7a580000000 488bd0 48c7c0ffffffff }
                                                                                                
        $sequence_3 = { e8???????? 90 488b03 833800 7513 488d15e1b30100 488d0dbab30100 }
                                                                                                
        $sequence_4 = { 488d55d0 488bcb e8???????? 90 4c8d058e300300 488d55c0 488bc8 }
                                                                                                
        $sequence_5 = { e8???????? 488b8d50050000 ff9568050000 488b8d60050000 ff5508 488d4c2448 48837c246008 }
                                                                                                
        $sequence_6 = { c644242c00 488d542420 488bcb e8???????? 4c89642438 458d6508 4c89642430 }
                                                                                                
        $sequence_7 = { 894708 488d5901 41bf20000000 418bc7 48f7e3 498d4fdf 480f40c1 }
                                                                                                
        $sequence_8 = { f30f7f442478 6644896c2468 488d9500030000 488d4c2468 e8???????? 90 4c8bc3 }
                                                                                                
        $sequence_9 = { 488903 408828 c7430801000000 488b5c2430 488b6c2438 488b742440 4883c420 }
                                                                                                
    condition:
        7 of them and filesize < 652288
}

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

ee7ae7aa-992f-4cb5-8988-9101962847f0

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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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