admin/splunk-security_content
1
0
Fork 0
mirror of https://github.com/splunk/security_content synced 2026-06-08 17:32:49 +00:00
Code Issues Packages Projects Releases Wiki Activity

Branch was auto-updated.

Browse Source
This commit is contained in:
github-actions[bot]
2021-08-24 13:25:37 +00:00
committed by GitHub
parent 08d40b20c7 9474ca260d
commit 0a4b58fbad
1 changed files with 14 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files
detections/experimental/network/protocols_passing_authentication_in_cleartext.yml
+14 -8
View File
@@ -1,26 +1,31 @@
name: Protocols passing authentication in cleartext
id: 6923cd64-17a0-453c-b945-81ac2d8c6db9
version: 2
date: '2020-11-04'
version: 3
date: '2021-08-19'
author: Rico Valdez, Splunk
type: TTP
datamodel:
- Network_Traffic
description: This search looks for cleartext protocols at risk of leaking credentials.
Currently, this consists of legacy protocols such as telnet, POP3, IMAP, and non-anonymous
FTP sessions. While some of these protocols can be used over SSL, they typically
run on different assigned ports in those cases.
description: The following analytic identifies cleartext protocols at risk of leaking sensitive information.
Currently, this consists of legacy protocols such as telnet (port 23), POP3 (port 110), IMAP (port 143), and non-anonymous
FTP (port 21) sessions. While some of these protocols may be used over SSL, they typically
are found on different assigned ports in those instances.
search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
as lastTime from datamodel=Network_Traffic where All_Traffic.transport="tcp" AND
as lastTime from datamodel=Network_Traffic where All_Traffic.action!=blocked AND All_Traffic.transport="tcp" AND
(All_Traffic.dest_port="23" OR All_Traffic.dest_port="143" OR All_Traffic.dest_port="110"
OR (All_Traffic.dest_port="21" AND All_Traffic.user != "anonymous")) by All_Traffic.user
All_Traffic.src All_Traffic.dest All_Traffic.dest_port | `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)` | `drop_dm_object_name("All_Traffic")` | `protocols_passing_authentication_in_cleartext_filter`'
how_to_implement: This search requires you to be ingesting your network traffic, and
populating the Network_Traffic data model.
For more accurate result it's better to limit destination to organization private and public IP range, like
All_Traffic.dest IN(192.168.0.0/16,172.16.0.0/12,10.0.0.0/8, x.x.x.x/22)
known_false_positives: Some networks may use kerberized FTP or telnet servers, however,
this is rare.
references: []
references:
- https://www.rackaid.com/blog/secure-your-email-and-file-transfers/
- https://www.infosecmatter.com/capture-passwords-using-wireshark/
tags:
analytic_story:
- Use of Cleartext Protocols
@@ -47,4 +52,5 @@ tags:
- All_Traffic.user
- All_Traffic.src
- All_Traffic.dest
- All_Traffic.action
security_domain: network