LSA PPL Protection Disabled Via Reg.EXE

 1title: LSA PPL Protection Disabled Via Reg.EXE
 2id: 8c0eca51-0f88-4db2-9183-fdfb10c703f9
 3status: test
 4description: Detects the usage of the "reg.exe" utility to disable PPL protection on the LSA process
 5references:
 6    - https://thedfirreport.com/2022/03/21/apt35-automates-initial-access-using-proxyshell/
 7author: Florian Roth (Nextron Systems)
 8date: 2022/03/22
 9modified: 2023/03/26
10tags:
11    - attack.defense_evasion
12    - attack.t1562.010
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection_img:
18        - Image|endswith: '\reg.exe'
19        - OriginalFileName: 'reg.exe'
20    selection_cli:
21        CommandLine|contains: 'SYSTEM\CurrentControlSet\Control\Lsa'
22        CommandLine|contains|all:
23            - ' add '
24            - ' /d 0'
25            - ' /v RunAsPPL '
26    condition: all of selection_*
27falsepositives:
28    - Unlikely
29level: high

References

• PHOSPHORUS Automates Initial Access Using ProxyShell

  

  In this intrusion, we observed the initial exploitation of the ProxyShell vulnerabilities followed by some further post-exploitation activity, which included web shells, credential dumping, and specialized payloads.

  
  Read More

Related rules

• BITS Transfer Job Download From Direct IP
• BITS Transfer Job Download To Potential Suspicious Folder
• BITS Transfer Job Downloading File Potential Suspicious Extension
• BITS Transfer Job With Uncommon Or Suspicious Remote TLD
• HackTool - Wmiexec Default Powershell Command