malicious_SVG_3

YARA detection rule by OPSWAT · Unknown

Identify malicious JavaScript on SVG files

rule malicious_SVG_3 : hardened
{
	meta:
		author = "OPSWAT"
		description = "Identify malicious JavaScript on SVG files"
		score = 75

	strings:
		$tag_svg_start = {3c 73 76 67}
		$tag_svg_end = {3c 2f 73 76 67 3e}
		$tag_script_start = {3c 73 63 72 69 70 74}
		$tag_script_end = {3c 2f 73 63 72 69 70 74}
		$st1_cdata = {3c 21 5b 43 44 41 54 41 5b}
		$st2_try = {74 72 79 20 7b}
		$st2_number_array = /= \[((\"|\')\d(\"|\'), ?){10}/
		$st2_window_location = {77 69 6e 64 6f 77 2e 6c 6f 63 61 74 69 6f 6e 2e 68 72 65 66 20 3d 20}

	condition:
		all of ( $tag* ) and $st1_cdata and not malicious_SVG_1 and not malicious_SVG_2 and all of ( $st2* ) and for all of ( $st* ) : ( @ > @tag_script_start and @ < @tag_script_end )
}

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

dc00515e-7e5d-423e-942b-69f1c6d426c0

Propose edits, view related rules, and engage with the community through comments.

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 ]]

Community Discussion