cert_blocklist_ac3c05f1cb9453de8e7110f589fb32c0

YARA detection rule by ReversingLabs · MIT

Certificate used for digitally signing malware.

import "pe"
rule cert_blocklist_ac3c05f1cb9453de8e7110f589fb32c0 {
    meta:
        author      = "ReversingLabs"
        source      = "ReversingLabs"
        status      = "RELEASED"
        sharing     = "TLP:WHITE"
        category    = "INFO"
        description = "Certificate used for digitally signing malware."

    condition:
        uint16(0) == 0x5A4D and
        for any i in (0..pe.number_of_signatures): (
            pe.signatures[i].subject contains "TRAIN BUILDING TEAM s.r.o." and (
                pe.signatures[i].serial == "00:ac:3c:05:f1:cb:94:53:de:8e:71:10:f5:89:fb:32:c0" or
                pe.signatures[i].serial == "ac:3c:05:f1:cb:94:53:de:8e:71:10:f5:89:fb:32:c0"
            ) and
            1635854205 <= pe.signatures[i].not_after
        )
}

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

9baf72ec-73a7-43f7-97b0-0e31f8aab28b

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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 ]]

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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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