Detection rules › Sigma
Potential Provlaunch.EXE Binary Proxy Execution Abuse
Detects child processes of "provlaunch.exe" which might indicate potential abuse to proxy execution.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Stealth | T1218 System Binary Proxy Execution |
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: 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.stealth
- 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
Stages and Predicates
Stage 0: condition
selection and not 1 of filter_main_*Stage 1: selection
selection:
ParentImage|endswith: '\provlaunch.exe'
Stage 2: not filter_main_covered_children
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\'
Exclusions
Top-level NOT(...) conjuncts: predicates this rule actively suppresses.
| Field | Kind | Excluded values |
|---|---|---|
Image | ends_with | \calc.exe |
Image | ends_with | \cmd.exe |
Image | ends_with | \cscript.exe |
Image | ends_with | \mshta.exe |
Image | ends_with | \notepad.exe |
Image | ends_with | \powershell.exe |
Image | ends_with | \pwsh.exe |
Image | ends_with | \regsvr32.exe |
Image | ends_with | \rundll32.exe |
Image | ends_with | \wscript.exe |
Image | match | :\PerfLogs\ |
Image | match | :\Temp\ |
Image | match | :\Users\Public\ |
Image | match | \AppData\Temp\ |
Image | match | \Windows\System32\Tasks\ |
Image | match | \Windows\Tasks\ |
Image | match | \Windows\Temp\ |
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 |
|---|---|---|
ParentImage | ends_with |
|