sublimehighRule

Service abuse: SurveyMonkey survey from newly registered domain

This Attack Surface Reduction (ASR) rule matches on SurveyMonkey Surveys with recently registered reply-to domains.

MITRE ATT&CK

T1566 T1566.001 T1566.002 T1598 T1036 T1027

defense-evasioninitial-access

Detection Query

type.inbound

// Legitimate SurveyMonkey sending infratructure
and sender.email.email == "member@surveymonkeyuser.com"
and headers.auth_summary.spf.pass
and headers.auth_summary.dmarc.pass
and any(headers.reply_to, network.whois(.email.domain).days_old < 30)
// 
// This rule makes use of a beta feature and is subject to change without notice
// using the beta feature in custom rules is not suggested until it has been formally released
// 

// reply-to email address has never been sent an email by the org
and not beta.profile.by_reply_to().solicited

// do not match if the reply_to address has been observed as a reply_to address
// of a message that has been classified as benign
and not beta.profile.by_reply_to().any_messages_benign

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Tags

Attack surface reduction

Raw Content

name: "Service abuse: SurveyMonkey survey from newly registered domain"
description: "This Attack Surface Reduction (ASR) rule matches on SurveyMonkey Surveys with recently registered reply-to domains."
type: "rule"
severity: "high"
source: |
  type.inbound
  
  // Legitimate SurveyMonkey sending infratructure
  and sender.email.email == "member@surveymonkeyuser.com"
  and headers.auth_summary.spf.pass
  and headers.auth_summary.dmarc.pass
  and any(headers.reply_to, network.whois(.email.domain).days_old < 30)
  // 
  // This rule makes use of a beta feature and is subject to change without notice
  // using the beta feature in custom rules is not suggested until it has been formally released
  // 
  
  // reply-to email address has never been sent an email by the org
  and not beta.profile.by_reply_to().solicited
  
  // do not match if the reply_to address has been observed as a reply_to address
  // of a message that has been classified as benign
  and not beta.profile.by_reply_to().any_messages_benign
tags:
 - "Attack surface reduction"
attack_types:
  - "Credential Phishing"
tactics_and_techniques:
  - "Evasion"
  - "Free file host"
  - "Social engineering"
detection_methods:
  - "Content analysis"
  - "Header analysis"
  - "Sender analysis"
id: "50a85fa7-c582-5644-b043-28c240d48603"