Detection rules › Sublime MQL

DLP: Greece National ID Card

Severity
high
Type
dlp
Source
github.com/sublime-security/sublime-rules

Detects messages containing Greek National ID Card numbers.

Event coverage

Rule body MQL

type.outbound
and any([body.current_thread.text, subject.subject],
        // Greek ID: 1-2 letters + 6 digits
        regex.contains(., '\b[A-Z]{1,2}\d{6}\b')
)
and any([body.current_thread.text, subject.subject],
        regex.icontains(., 'ταυτότητα|national\s+ID|identity\s+card')
)
and (
  strings.icontains(sender.email.domain.tld, "gr")
  or strings.icontains(body.current_thread.text, "greece")
)

Detection logic

Scope: outbound message.

Detects messages containing Greek National ID Card numbers.

  1. outbound message
  2. any of [body.current_thread.text, subject.subject] where:
    • . matches '\\b[A-Z]{1,2}\\d{6}\\b'
  3. any of [body.current_thread.text, subject.subject] where:
    • . matches 'ταυτότητα|national\\s+ID|identity\\s+card'
  4. any of:
    • sender.email.domain.tld contains 'gr'
    • body.current_thread.text contains 'greece'

Inspects: body.current_thread.text, sender.email.domain.tld, subject.subject, type.outbound. Sensors: regex.contains, regex.icontains, strings.icontains.

Indicators matched (4)

FieldMatchValue
regex.containsregex\b[A-Z]{1,2}\d{6}\b
regex.icontainsregexταυτότητα|national\s+ID|identity\s+card
strings.icontainssubstringgr
strings.icontainssubstringgreece