Mersenne_Twister

YARA detection rule by filescanio

Rule Mersenne_Twister (No description metadata provided).

import "pe"
rule Mersenne_Twister : hardened
{
	meta:
		reference = "https://en.wikipedia.org/wiki/Mersenne_Twister"
		score = 50

	strings:
		$initialize_loop = {
            48 81 ?? 70 02 00 00
        }
		$initialize_seed_processing = {
            C1 ?? 1E [0-3] 33 C8 [0-8] (69 ?? 65 89 07 6C | 0F AF ??) [0-9] 03
        }
		$random_btr_op = {
            0F BA (F1 | F0) 1F
        }
		$const_1 = {
            65 89 07 6C
        }
		$const_2 = {
            DF B0 08 99
        }

	condition:
		pe.is_pe and uint16( 0 ) == 0x5A4D and ( $initialize_loop ) and ( $random_btr_op ) and ( $const_1 ) and ( $const_2 ) and ( $initialize_seed_processing )
}

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

9193ddf9-08a1-48e7-b0e4-4fee2073d2ce

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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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