Failed_Checksum

YARA detection rule by HydraDragonAntivirus · GPL-2.0

Did you know that 83% of malware has invalid checksums and 90% of legitimate files had valid checksums?

import "pe"
rule Failed_Checksum {
	meta:
		description = "Did you know that 83% of malware has invalid checksums and 90% of legitimate files had valid checksums?"
		source = "https://practicalsecurityanalytics.com/pe-checksum/"
	condition:
		pe.checksum != pe.calculate_checksum()
}

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

c12e04e7-f8eb-4ed3-b371-e8ebf5c38fdb

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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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