Cisco IOS XE Request Platform Package Describe Shell Pattern

 Original Source: [splunk source]
Name:Cisco IOS XE Request Platform Package Describe Shell Pattern
id:a113a8be-7386-46e0-a079-d9fd46f9631f
version:1
date:None
author:Nasreddine Bencherchali
status:production
type:TTP
Description:This analytic detects Cisco IOS-XE "request platform software package describe" commands containing suspicious shell-style filename patterns. Indicative of Slat Typhoon tradecraft.
Data_source:
  • -Cisco IOS Logs
search:`cisco_ios`
facility IN ("AAA", "HA_EM")
mnemonic IN ("AAA_ACCOUNTING_MESSAGE", "LOG")
message_text="*request platform software package describe*"
message_text IN ("*--filename=/(bash)n*", "*--filename=$(bash)n*")

| eval dest=coalesce(host, dvc, dest, "unknown")
| stats count min(_time) as firstTime
max(_time) as lastTime
values(message_text) as message
by dest
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `cisco_ios_xe_request_platform_package_describe_shell_pattern_filter`


how_to_implement:Use the Cisco Catalyst Add-on for Splunk (https://splunkbase.splunk.com/app/7538) to Ingest Cisco IOS-XE syslog with sourcetype "cisco:ios". Command visibility requires AAA command accounting or EEM catchall command logging.
known_false_positives:No false positives have been identified at this time.
References:
  -https://www.cisa.gov/news-events/cybersecurity-advisories/aa25-239a
  -https://blog.talosintelligence.com/salt-typhoon-analysis/
drilldown_searches:
 name:'View the detection results for - "$dest$"'
 search:'%original_detection_search% | search dest = "$dest$"'
 earliest_offset:'$info_min_time$'
 latest_offset:'$info_max_time$'
 name:'View risk events for the last 7 days for - "$dest$"'
 search:'| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$") | stats count min(_time) as firstTime max(_time) as lastTime values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories) as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic) as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`'
 earliest_offset:'7d'
 latest_offset:'0'
analytic_story:['Salt Typhoon']

asset_type:Network

mitre_attack_id:['T1059', 'T1190']

product:['Splunk Enterprise', 'Splunk Enterprise Security', 'Splunk Cloud']

category:application

security_domain:network

tags:

tests:
 name:'True Positive Test'
 attack_data:
  data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/emerging_threats/SaltTyphoon/salttyphoon_cisco.log
  source: ctb:catalyst:syslog
  sourcetype: cisco:ios
 test_type:'unit'
manual_test:None

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