mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
root
77 lines
2.5 KiB
YAML
77 lines
2.5 KiB
YAML
name: Web JSP Request via URL
|
|
id: 2850c734-2d44-4431-8139-1a56f6f54c01
|
|
version: 1
|
|
date: '2022-04-05'
|
|
author: Michael Haag, Splunk
|
|
type: TTP
|
|
datamodel:
|
|
- Web
|
|
description: The following analytic identifies the common URL requests used by a recent
|
|
CVE - CVE-2022-22965, or Spring4Shell, to access a webshell on the remote webserver.
|
|
The filename and cmd are arbitrary in this exploitation. Java will write a JSP to
|
|
disk and a process will spawn from Java based on the cmd passed. This is indicative
|
|
of typical web shell activity.
|
|
search: '| tstats count from datamodel=Web where Web.http_method IN ("GET") Web.url
|
|
IN ("*.jsp?cmd=*","*j&cmd=*") by Web.http_user_agent Web.http_method, Web.url,Web.url_length
|
|
Web.src, Web.dest sourcetype | `drop_dm_object_name("Web")` | `security_content_ctime(firstTime)`
|
|
| `security_content_ctime(lastTime)` | `web_jsp_request_via_url_filter`'
|
|
how_to_implement: To successfully implement this search you need to be ingesting information
|
|
on Web traffic that include fields relavent for traffic into the `Web` datamodel.
|
|
known_false_positives: False positives may be present with legitimate applications.
|
|
Attempt to filter by dest IP or use Asset groups to restrict to servers.
|
|
references:
|
|
- https://www.microsoft.com/security/blog/2022/04/04/springshell-rce-vulnerability-guidance-for-protecting-against-and-detecting-cve-2022-22965/
|
|
- https://github.com/TheGejr/SpringShell
|
|
- https://www.tenable.com/blog/spring4shell-faq-spring-framework-remote-code-execution-vulnerability
|
|
tags:
|
|
analytic_story:
|
|
- Spring4Shell CVE-2022-22965
|
|
cve:
|
|
- CVE-2022-22965
|
|
asset_type: Web Server
|
|
cis20:
|
|
- CIS 3
|
|
- CIS 5
|
|
- CIS 16
|
|
confidence: 80
|
|
context:
|
|
- Scope:Network
|
|
dataset:
|
|
- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1190/spring4shell/spring4shell_nginx.log
|
|
impact: 90
|
|
kill_chain_phases:
|
|
- Exploitation
|
|
message: A suspicious URL has been requested against $dest$ by $src$, related to
|
|
web shell activity.
|
|
mitre_attack_id:
|
|
- T1505.003
|
|
- T1505
|
|
- T1190
|
|
nist:
|
|
- DE.CM
|
|
observable:
|
|
- name: dest
|
|
type: Hostname
|
|
role:
|
|
- Victim
|
|
- name: src
|
|
type: IP Address
|
|
role:
|
|
- Attacker
|
|
product:
|
|
- Splunk Enterprise
|
|
- Splunk Enterprise Security
|
|
- Splunk Cloud
|
|
required_fields:
|
|
- _time
|
|
- Web.http_method
|
|
- Web.url
|
|
- Web.url_length
|
|
- Web.src
|
|
- Web.dest
|
|
- Web.http_user_agent
|
|
risk_score: 72
|
|
security_domain: network
|
|
supported_tas:
|
|
- Splunk_TA_nginx
|