mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
P4T12ICK
86 lines
2.9 KiB
YAML
86 lines
2.9 KiB
YAML
name: Windows InstallUtil URL in Command Line
|
|
id: 28e06670-43df-11ec-a569-acde48001122
|
|
version: 1
|
|
date: '2021-11-12'
|
|
author: Michael Haag, Splunk
|
|
status: production
|
|
type: TTP
|
|
description: 'The following analytic identifies the Windows InstallUtil.exe binary
|
|
passing a HTTP request on the command-line. This technique may be used to download
|
|
and execute code while bypassing application control. \
|
|
|
|
When `InstallUtil.exe` is used in a malicous manner, the path to an executable on
|
|
the filesystem is typically specified. Take note of the parent process. In a suspicious
|
|
instance, this will be spawned from a non-standard process like `Cmd.exe`, `PowerShell.exe`
|
|
or `Explorer.exe`. \
|
|
|
|
If used by a developer, typically this will be found with multiple command-line
|
|
switches/arguments and spawn from Visual Studio. \
|
|
|
|
During triage review resulting network connections, file modifications, and parallel
|
|
processes. Capture any artifacts and review further.'
|
|
data_source:
|
|
- Sysmon Event ID 1
|
|
search:
|
|
selection1:
|
|
OriginalFileName: InstallUtil.exe
|
|
selection2:
|
|
Image|endswith: installutil.exe
|
|
selection3:
|
|
CommandLine:
|
|
- '*http://*'
|
|
- '*https://*'
|
|
condition: (selection1 or selection2) and selection3
|
|
how_to_implement: To successfully implement this search you need to be ingesting information
|
|
on process that include the name of the process responsible for the changes from
|
|
your endpoints into the `Endpoint` datamodel in the `Processes` node. In addition,
|
|
confirm the latest CIM App 4.20 or higher is installed and the latest TA for the
|
|
endpoint product.
|
|
known_false_positives: Limited false positives should be present as InstallUtil is
|
|
not typically used to download remote files. Filter as needed based on Developers
|
|
requirements.
|
|
references:
|
|
- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1218.004/T1218.004.md
|
|
- https://gist.github.com/DanielRTeixeira/0fd06ec8f041f34a32bf5623c6dd479d
|
|
tags:
|
|
analytic_story:
|
|
- Signed Binary Proxy Execution InstallUtil
|
|
- Living Off The Land
|
|
asset_type: Endpoint
|
|
confidence: 100
|
|
impact: 80
|
|
message: An instance of $parent_process_name$ spawning $process_name$ was identified
|
|
on endpoint $dest$ by user $user$ passing a URL on the command-line.
|
|
mitre_attack_id:
|
|
- T1218.004
|
|
- T1218
|
|
observable:
|
|
- name: user
|
|
type: User
|
|
role:
|
|
- Victim
|
|
- name: dest
|
|
type: Hostname
|
|
role:
|
|
- Victim
|
|
- name: parent_process_name
|
|
type: Process
|
|
role:
|
|
- Parent Process
|
|
- name: process_name
|
|
type: Process
|
|
role:
|
|
- Child Process
|
|
product:
|
|
- Splunk Enterprise
|
|
- Splunk Enterprise Security
|
|
- Splunk Cloud
|
|
risk_score: 80
|
|
security_domain: endpoint
|
|
tests:
|
|
- name: True Positive Test
|
|
attack_data:
|
|
- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1218.004/atomic_red_team/windows-sysmon.log
|
|
source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
|
|
sourcetype: xmlwineventlog
|