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Sensitive Files Compression

Elastic Stack Serverless Security

Identifies the use of a compression utility to collect known files containing sensitive information, such as credentials and system configurations.

Rule type: query

Rule indices:

  • auditbeat-*
  • logs-endpoint.events.*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Elastic
  • Host
  • Linux
  • Threat Detection
  • Collection
  • Credential Access

Version: 101

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

event.category:process and event.type:start and
  process.name:(zip or tar or gzip or hdiutil or 7z) and
  process.args:
    (
      /root/.ssh/id_rsa or
      /root/.ssh/id_rsa.pub or
      /root/.ssh/id_ed25519 or
      /root/.ssh/id_ed25519.pub or
      /root/.ssh/authorized_keys or
      /root/.ssh/authorized_keys2 or
      /root/.ssh/known_hosts or
      /root/.bash_history or
      /etc/hosts or
      /home/*/.ssh/id_rsa or
      /home/*/.ssh/id_rsa.pub or
      /home/*/.ssh/id_ed25519 or
      /home/*/.ssh/id_ed25519.pub or
      /home/*/.ssh/authorized_keys or
      /home/*/.ssh/authorized_keys2 or
      /home/*/.ssh/known_hosts or
      /home/*/.bash_history or
      /root/.aws/credentials or
      /root/.aws/config or
      /home/*/.aws/credentials or
      /home/*/.aws/config or
      /root/.docker/config.json or
      /home/*/.docker/config.json or
      /etc/group or
      /etc/passwd or
      /etc/shadow or
      /etc/gshadow
    )

Framework: MITRE ATT&CKTM