Cobaltbaltstrike_Beacon_x64

YARA detection rule by Avast Threat Intel Team · NOASSERTION

Detects CobaltStrike payloads

rule Cobaltbaltstrike_Beacon_x64
{
  meta:
    author = "Avast Threat Intel Team"
    description = "Detects CobaltStrike payloads"
    reference = "https://github.com/avast/ioc"
    id = "5d6d86ec-9e05-5596-b623-30f44c6f44db"
  strings:
        $h01 = { 4D 5A 41 52 55 48 89 E5 48 81 EC 20 00 00 00 48 8D 1D EA FF FF FF 48 89 }
        $h11 = { 00 01 00 01 00 02 ?? ?? 00 02 00 01 00 02 ?? ?? 00 }
        $h12 = { 69 68 69 68 69 6B ?? ?? 69 6B 69 68 69 6B ?? ?? 69 }
        $h13 = { 2E 2F 2E 2F 2E 2C ?? ?? 2E 2C 2E 2F 2E 2C ?? ?? 2E }
  condition:
    $h01 and
    any of ($h1*)
}

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

cea1f0c3-fdeb-4440-b0fd-c59028d79716

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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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