Cisco Secure Firewall - Lumma Stealer Activity

name: Cisco Secure Firewall - Lumma Stealer Activity
id: 96bce783-c22e-4e48-8cf1-3eb2794c5083
version: 5
date: '2026-03-10'
author: Nasreddine Bencherchali, Splunk, Talos NTDR
status: production
type: TTP
description: |
    This analytic detects Lumma Stealer activity using Cisco Secure Firewall Intrusion Events.
    It leverages Cisco Secure Firewall Threat Defense IntrusionEvent logs to identify cases where four of the following Snort signature IDs 64793, 64794, 64797, 64798, 64799, 64800, 64801, 62709, 64167, 64168, 64169, 64796, 62710, 62711, 62712, 62713, 62714, 62715, 62716, 62717, 64812, 64810, 64811 occurs in the span of 15 minutes from the same host.
    If confirmed malicious, this behavior is highly indicative of a successful infection of Lumma Stealer.
data_source:
    - Cisco Secure Firewall Threat Defense Intrusion Event
search: |
    `cisco_secure_firewall` EventType=IntrusionEvent signature_id IN (64793, 64794, 64797, 64798, 64799, 64800, 64801, 62709, 64167, 64168, 64169, 64796, 62710, 62711, 62712, 62713, 62714, 62715, 62716, 62717, 64812, 64810, 64811)
    | bin _time span=15m
    | fillnull
    | stats dc(signature_id) as unique_signature_count
            values(signature_id) as signature_id
            values(signature) as signature
            values(class_desc) as class_desc
            values(MitreAttackGroups) as MitreAttackGroups
            values(InlineResult) as InlineResult
            values(InlineResultReason) as InlineResultReason
            values(dest) as dest
            values(dest_port) as dest_port
            values(rule) as rule
            values(transport) as transport
            values(app) as app
            min(_time) as firstTime
            max(_time) as lastTime
            by src
    | where unique_signature_count >= 3
    | `security_content_ctime(firstTime)`
    | `security_content_ctime(lastTime)`
    | `cisco_secure_firewall___lumma_stealer_activity_filter`
how_to_implement: |
    This search requires Cisco Secure Firewall Threat Defense Logs, which
    includes the IntrusionEvent EventType. This search uses an input macro named `cisco_secure_firewall`.
    We strongly recommend that you specify your environment-specific configurations
    (index, source, sourcetype, etc.) for Cisco Secure Firewall Threat Defense logs. Replace the macro definition
    with configurations for your Splunk environment. The search also uses a post-filter
    macro designed to filter out known false positives.
    The logs are to be ingested using the Splunk Add-on for Cisco Security Cloud (https://splunkbase.splunk.com/app/7404).
    The intrusion access policy must also be configured.
known_false_positives: False positives should be very unlikely.
references:
    - https://malpedia.caad.fkie.fraunhofer.de/details/win.lumma
drilldown_searches:
    - name: View the detection results for - "$dest$" and "$src$"
      search: '%original_detection_search% | search  dest = "$dest$" and src = "$src$"'
      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 ("$dest$") starthoursago=168  | 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: $info_min_time$
      latest_offset: $info_max_time$
rba:
    message: Lumma Stealer Activity on host $dest$ origniating from $src$
    risk_objects:
        - field: dest
          type: system
          score: 50
    threat_objects:
        - field: signature
          type: signature
        - field: src
          type: ip_address
tags:
    analytic_story:
        - Cisco Secure Firewall Threat Defense Analytics
        - Lumma Stealer
    asset_type: Network
    security_domain: network
    mitre_attack_id:
        - T1190
        - T1210
        - T1027
        - T1204
    product:
        - Splunk Enterprise
        - Splunk Cloud
        - Splunk Enterprise Security
tests:
    - name: True Positive Test
      attack_data:
        - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/cisco_secure_firewall_threat_defense/lumma_stealer/lumma_stealer_events.log
          source: not_applicable
          sourcetype: cisco:sfw:estreamer