mal_FenixBotnet_jse

YARA detection rule by RussianPanda

Detects Fenix Botnet JSE downloader

rule mal_FenixBotnet_jse {
    meta:
        description = "Detects Fenix Botnet JSE downloader"
        author = "RussianPanda"
        date = "2024-01-18"
        hash = "a7fadf0050d4d0b2cefd808e16dfde69"
    strings:
        $s1 = {76 61 72 20 [0-30] 3D 20 22 66 22}
        $s2 = {76 61 72 20 [0-30] 3D 20 22 75 22}
        $s3 = {76 61 72 20 [0-30] 3D 20 22 6E 22}
        $s4 = {6E 65 77 20 46 75 6E 63 74 69 6F 6E 28 64 65 63 6F 64 65 55 52 49 43 6F 6D 70 6F 6E 65 6E 74 28 [0-30] 29 29 2E 63 61 6C 6C 28 29}
    condition:
        all of ($s*)
}

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

bb341bf4-d0c1-41f6-a216-016324e25d76

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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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