SUSP_LNX_ARCH_ALPM_Hook_Jun26_RID3097

YARA detection rule by Marius Benthin · CC-BY-NC https://creativecommons.org/licenses/by-nc/4.0/

Detects suspicious execution commands in Arch ALPM hooks

rule SUSP_LNX_ARCH_ALPM_Hook_Jun26_RID3097: DEMO LINUX SUSP {
  meta:
    description = "Detects suspicious execution commands in Arch ALPM hooks"
    author      = "Marius Benthin"
    reference   = "https://www.sonatype.com/blog/atomic-arch-npm-campaign-adds-malicious-dependency"
    date        = "2026-06-15 12:46:21"
    score       = 70
    customer    = "demo"
    license     = "CC-BY-NC https://creativecommons.org/licenses/by-nc/4.0/"

    tags         = "DEMO, LINUX, SUSP"
    minimum_yara = "3.5.0"

  strings:
    $s1 = "[Action]"
    $s2 = "Exec = "
    $s3 = "npm install "
    $s4 = "2>/dev/null"

  condition:
    filesize < 5KB and all of them
}

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

8f7833cc-23d6-4bf5-af9c-72bd29567265

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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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