27 lines
643 B
YAML
27 lines
643 B
YAML
id: expn-mail-detect
|
|
|
|
info:
|
|
name: EXPN Mail Server Detect
|
|
author: r3dg33k
|
|
severity: info
|
|
description: |
|
|
The "EXPN" can be used by attackers to learn about valid usernames on the target system. On some SMTP servers, EXPN can be used to show the subscribers of a mailing list subscription lists are generally considered to be sensitive information.
|
|
tags: mail,expn,network,detect
|
|
metadata:
|
|
max-request: 2
|
|
|
|
tcp:
|
|
- inputs:
|
|
- data: "65686c6f20636865636b746c730a"
|
|
type: hex
|
|
read-size: 2048
|
|
|
|
host:
|
|
- "{{Hostname}}"
|
|
port: 25
|
|
|
|
matchers:
|
|
- type: word
|
|
words:
|
|
- "250-EXPN"
|