Potential Memory Seeking Activity

Monitors for the execution of Unix utilities that may be leveraged as memory address seekers. Attackers may leverage built-in utilities to seek specific memory addresses, allowing for potential future manipulation/exploitation.

Rule type: eql

Rule indices:

logs-endpoint.events.*
endgame-*

Severity: low

Risk score: 21

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

https://github.com/arget13/DDexec

Tags:

Domain: Endpoint
OS: Linux
Use Case: Threat Detection
Tactic: Discovery
Rule Type: BBR
Data Source: Elastic Defend
Data Source: Elastic Endgame

Version: 3

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

edit

process where host.os.type == "linux" and event.type == "start" and event.action in ("exec", "exec_event") and (
  (process.name == "tail" and process.args in ("-c", "--bytes")) or
  (process.name == "cmp" and process.args == "-i") or
  (process.name in ("hexdump", "xxd") and process.args == "-s") or
  (process.name == "dd" and process.args : ("skip*", "seek*"))
) and not (
  process.parent.args like ("/opt/error_monitor/error_monitor.sh", "printf*") or
  process.parent.name in ("acme.sh", "dracut", "leapp") or
  process.parent.executable like (
    "/bin/cagefs_enter", "/opt/nessus_agent/sbin/nessus-service", "/usr/libexec/platform-python*",
    "/usr/libexec/vdsm/vdsmd", "/usr/local/bin/docker-entrypoint.sh", "/usr/lib/module-init-tools/lsinitrd-quick"
  ) or
  process.parent.command_line like "sh*acme.sh*" or
  process.args like "/var/tmp/dracut*"
)

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Discovery
- ID: TA0007
- Reference URL: https://attack.mitre.org/tactics/TA0007/
Technique:
- Name: Process Discovery
- ID: T1057
- Reference URL: https://attack.mitre.org/techniques/T1057/

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