win_postnaptea_auto

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

Detects win.postnaptea.

rule win_postnaptea_auto {

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

    


    strings:
        $sequence_0 = { 4c8930 488b4638 4c8930 488b4650 448930 488d053ebf0600 488906 }
                                                                                                
        $sequence_1 = { f30f1084059c060000 f30f58840598060000 f30f118c8d900a0000 f30f104c058c f30f584c0588 f30f588405d8060000 f30f584c05c8 }
                                                                                                
        $sequence_2 = { c745a4a00f0000 48895de8 33d2 41b880000000 488d8d40130000 e8???????? 33d2 }
                                                                                                
        $sequence_3 = { e8???????? 4c8b05???????? 488905???????? 498bc8 ffd0 4c8b05???????? 4d85c0 }
                                                                                                
        $sequence_4 = { c7456cd4f588f5 c7457093f5a0f5 c74574c2f5c2f5 c74578def5daf5 c7457ccef5def5 c78580000000d2f5d7f5 c7858400000093f5dbf5 }
                                                                                                
        $sequence_5 = { c7858c000000eaf5b0f5 c78590000000abf5b2f5 c78594000000b6f5f0f5 33c0 66898598000000 418bd6 0f1f840000000000 }
                                                                                                
        $sequence_6 = { e8???????? 488905???????? 498bcd ffd0 488b4de8 ff15???????? 488b4df0 }
                                                                                                
        $sequence_7 = { ffd0 448be8 85c0 740b 3d03010000 0f85b7010000 8b4d03 }
                                                                                                
        $sequence_8 = { c785f80000007cf577f5 c785fc00000069f56bf5 c785000100002ef50000 418bd0 660f1f840000000000 4863c2 488d8df8000000 }
                                                                                                
        $sequence_9 = { c785c0040000eaf5e5f5 c785c4040000eff5e9f5 c785c8040000adf5b4f5 c785cc040000aff50000 33ff 8bd7 0f1f840000000000 }
                                                                                                
    condition:
        7 of them and filesize < 2457600
}

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

4ae1bc01-f4e4-4bb0-9997-4504ef1945b8

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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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