Exploiting CVE-2019-1388

 1title: Exploiting CVE-2019-1388
 2id: 02e0b2ea-a597-428e-b04a-af6a1a403e5c
 3status: stable
 4description: Detects an exploitation attempt in which the UAC consent dialogue is used to invoke an Internet Explorer process running as LOCAL_SYSTEM
 5references:
 6    - https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1388
 7    - https://www.zerodayinitiative.com/blog/2019/11/19/thanksgiving-treat-easy-as-pie-windows-7-secure-desktop-escalation-of-privilege
 8author: Florian Roth (Nextron Systems)
 9date: 2019-11-20
10modified: 2022-05-27
11tags:
12    - attack.privilege-escalation
13    - attack.t1068
14    - cve.2019-1388
15    - detection.emerging-threats
16logsource:
17    category: process_creation
18    product: windows
19detection:
20    selection:
21        ParentImage|endswith: '\consent.exe'
22        Image|endswith: '\iexplore.exe'
23        CommandLine|contains: ' http'
24    rights1:
25        IntegrityLevel: 'System'  # for Sysmon users
26    rights2:
27        User|contains: # covers many language settings
28            - 'AUTHORI'
29            - 'AUTORI'
30    condition: selection and ( rights1 or rights2 )
31falsepositives:
32    - Unknown
33level: critical

References

• Security Update Guide - Microsoft Security Response Center

  
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• Zero Day Initiative — Thanksgiving Treat: Easy-as-Pie Windows 7 Secure Desktop Escalation of Privilege

  

  Not much interesting so far, just Yes and No buttons, a password input field, and an X button. You can click the upper-left corner of the window and get the standard, little-used “window menu”, having just Move and Close commands. The password input field is a bit interesting to poke around in. Perh

  
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