php_in_image

YARA detection rule by Vlad https://github.com/vlad-s · GPL-2.0

Finds image files w/ PHP code in images

rule php_in_image
{
    meta:
        author      = "Vlad https://github.com/vlad-s"
        date        = "2016/07/18"
        description = "Finds image files w/ PHP code in images"
    strings:
        $gif = /^GIF8[79]a/
        $jfif = { ff d8 ff e? 00 10 4a 46 49 46 }
        $png = { 89 50 4e 47 0d 0a 1a 0a }

        $php_tag = "<?php"
    condition:
        (($gif at 0) or
        ($jfif at 0) or
        ($png at 0)) and

        $php_tag
}

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

43f00e93-a6ee-44c3-8044-2c58ac62c5ea

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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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