Detection rules › Sigma
Exploiting CVE-2019-1388
Detects an exploitation attempt in which the UAC consent dialogue is used to invoke an Internet Explorer process running as LOCAL_SYSTEM
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Privilege Escalation | T1068 Exploitation for Privilege Escalation |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 1 | Process creation |
| Security-Auditing | Event ID 4688 | A new process has been created. |
Rule body yaml
title: Exploiting CVE-2019-1388
id: 02e0b2ea-a597-428e-b04a-af6a1a403e5c
status: stable
description: Detects an exploitation attempt in which the UAC consent dialogue is used to invoke an Internet Explorer process running as LOCAL_SYSTEM
references:
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1388
- https://www.zerodayinitiative.com/blog/2019/11/19/thanksgiving-treat-easy-as-pie-windows-7-secure-desktop-escalation-of-privilege
author: Florian Roth (Nextron Systems)
date: 2019-11-20
modified: 2024-12-01
tags:
- attack.privilege-escalation
- attack.t1068
- cve.2019-1388
- detection.emerging-threats
logsource:
category: process_creation
product: windows
detection:
selection_img:
ParentImage|endswith: '\consent.exe'
Image|endswith: '\iexplore.exe'
CommandLine|contains: ' http'
selection_rights:
- IntegrityLevel:
- 'System' # for Sysmon users
- 'S-1-16-16384' # System
- User|contains: # covers many language settings
- 'AUTHORI'
- 'AUTORI'
condition: all of selection_*
falsepositives:
- Unknown
level: critical
Stages and Predicates
Stage 0: condition
all of selection_*Stage 1: selection_img
selection_img:
ParentImage|endswith: '\consent.exe'
Image|endswith: '\iexplore.exe'
CommandLine|contains: ' http'
Stage 2: selection_rights
selection_rights:
- IntegrityLevel:
- 'System'
- 'S-1-16-16384'
- User|contains:
- 'AUTHORI'
- 'AUTORI'
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
CommandLine | match |
|
Image | ends_with |
|
IntegrityLevel | eq |
|
ParentImage | ends_with |
|
User | match |
|