IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Base16 or Base32 Encoding/Decoding Activity
editBase16 or Base32 Encoding/Decoding Activity
editAdversaries may encode/decode data in an attempt to evade detection by host- or network-based security controls.
Rule type: query
Rule indices:
- auditbeat-*
- logs-endpoint.events.*
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: None
Tags:
- Elastic
- Host
- Linux
- Threat Detection
- Defense Evasion
Version: 101
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule query
editevent.category:process and event.type:(start or process_started) and process.name:(base16 or base32 or base32plain or base32hex)
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Obfuscated Files or Information
- ID: T1027
- Reference URL: https://attack.mitre.org/techniques/T1027/
-
Technique:
- Name: Deobfuscate/Decode Files or Information
- ID: T1140
- Reference URL: https://attack.mitre.org/techniques/T1140/