sublimemediumRule

Link: IPv4-mapped IPv6 address obfuscation

Detects links containing IPv4-mapped IPv6 addresses in the format [::ffff:xxxx:xxxx], commonly used to obfuscate malicious URLs and evade detection systems.

MITRE ATT&CK

T1566 T1566.001 T1566.002 T1598 T1204.002 T1486 T1036 T1027

defense-evasion

Detection Query

type.inbound
and any(body.links, .href_url.ip.translation.v4_to_v6)

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Tags

Attack surface reduction

Raw Content

name: "Link: IPv4-mapped IPv6 address obfuscation"
description: "Detects links containing IPv4-mapped IPv6 addresses in the format [::ffff:xxxx:xxxx], commonly used to obfuscate malicious URLs and evade detection systems."
type: "rule"
severity: "medium"
source: |
  type.inbound
  and any(body.links, .href_url.ip.translation.v4_to_v6)
tags:
  - "Attack surface reduction"
attack_types:
  - "Credential Phishing"
  - "Malware/Ransomware"
tactics_and_techniques:
  - "Evasion"
detection_methods:
  - "Content analysis"
  - "URL analysis"
id: "caacf30c-fd89-5869-a945-c660ff9bda40"