sigmamediumHunting

Potential Provlaunch.EXE Binary Proxy Execution Abuse

Detects child processes of "provlaunch.exe" which might indicate potential abuse to proxy execution.

MITRE ATT&CK

defense-evasion

Detection Query

selection:
  ParentImage|endswith: \provlaunch.exe
filter_main_covered_children:
  - Image|endswith:
      - \calc.exe
      - \cmd.exe
      - \cscript.exe
      - \mshta.exe
      - \notepad.exe
      - \powershell.exe
      - \pwsh.exe
      - \regsvr32.exe
      - \rundll32.exe
      - \wscript.exe
  - Image|contains:
      - :\PerfLogs\
      - :\Temp\
      - :\Users\Public\
      - \AppData\Temp\
      - \Windows\System32\Tasks\
      - \Windows\Tasks\
      - \Windows\Temp\
condition: selection and not 1 of filter_main_*

Author

Nasreddine Bencherchali (Nextron Systems), Swachchhanda Shrawan Poudel

Created

2023-08-08

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.defense-evasionattack.t1218

Raw Content

title: Potential Provlaunch.EXE Binary Proxy Execution Abuse
id: 7f5d1c9a-3e83-48df-95a7-2b98aae6c13c
related:
    - id: f9999590-1f94-4a34-a91e-951e47bedefd # CLI Abuse
      type: similar
    - id: 2a4b3e61-9d22-4e4a-b60f-6e8f0cde6f25 # CLI Registry
      type: similar
    - id: 7021255e-5db3-4946-a8b9-0ba7a4644a69 # Registry
      type: similar
status: test
description: Detects child processes of "provlaunch.exe" which might indicate potential abuse to proxy execution.
references:
    - https://lolbas-project.github.io/lolbas/Binaries/Provlaunch/
    - https://twitter.com/0gtweet/status/1674399582162153472
author: Nasreddine Bencherchali (Nextron Systems), Swachchhanda Shrawan Poudel
date: 2023-08-08
tags:
    - attack.defense-evasion
    - attack.t1218
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith: '\provlaunch.exe'
    filter_main_covered_children:
        # Note: this filter is here to avoid duplicate alerting by f9999590-1f94-4a34-a91e-951e47bedefd
        - Image|endswith:
              - '\calc.exe'
              - '\cmd.exe'
              - '\cscript.exe'
              - '\mshta.exe'
              - '\notepad.exe'
              - '\powershell.exe'
              - '\pwsh.exe'
              - '\regsvr32.exe'
              - '\rundll32.exe'
              - '\wscript.exe'
        - Image|contains:
              - ':\PerfLogs\'
              - ':\Temp\'
              - ':\Users\Public\'
              - '\AppData\Temp\'
              - '\Windows\System32\Tasks\'
              - '\Windows\Tasks\'
              - '\Windows\Temp\'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unknown
level: medium