Potential DNS Tunneling via Iodine

Iodine is a tool for tunneling Internet protocol version 4 (IPV4) traffic over the DNS protocol to circumvent firewalls, network security groups, and network access lists while evading detection.

Rule type: query

Rule indices:

auditbeat-*
logs-endpoint.events.*

Severity: high

Risk score: 73

Runs every: 5 minutes

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

Maximum alerts per execution: 100

References:

https://code.kryo.se/iodine/

Tags:

Elastic
Host
Linux
Threat Detection

Version: 7 (version history)

Added (Elastic Stack release): 7.6.0

Last modified (Elastic Stack release): 7.12.0

Rule authors: Elastic

Rule license: Elastic License v2

Potential false positives

edit

Normal use of Iodine is uncommon apart from security testing and research. Use by non-security engineers is very uncommon.

Rule query

edit

event.category:process and event.type:(start or process_started) and
process.name:(iodine or iodined)

Rule version history

edit

Version 7 (7.12.0 release)

Formatting only

Version 6 (7.11.2 release)

Formatting only

Version 5 (7.10.0 release)

Formatting only

Version 4 (7.9.1 release)

Formatting only

Version 3 (7.9.0 release)

Updated query, changed from:

process.name:(iodine or iodined) and event.action:executed

Version 2 (7.7.0 release)

Updated query, changed from:

process.name: (iodine or iodined) and event.action:executed

« Potential DLL SideLoading via Trusted Microsoft Programs Potential DNS Tunneling via NsLookup »