Detection rules › Sublime MQL

Link: IPv4-mapped IPv6 address obfuscation

Severity
medium
Type
rule
Source
github.com/sublime-security/sublime-rules

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

Threat classification

Sublime's own taxonomy (not MITRE ATT&CK).

CategoryValues
Attack typesCredential Phishing, Malware/Ransomware
Tactics and techniquesEvasion

Event coverage

Rule body MQL

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

Detection logic

Scope: inbound message.

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

  1. inbound message
  2. any of body.links where:
    • .href_url.ip.translation.v4_to_v6

Inspects: body.links, body.links[].href_url.ip.translation.v4_to_v6, type.inbound.