Detection rules › Sigma
Uncommon Child Process Of Setres.EXE
Detects uncommon child process of Setres.EXE. Setres.EXE is a Windows server only process and tool that can be used to set the screen resolution. It can potentially be abused in order to launch any arbitrary file with a name containing the word "choice" from the current execution path.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Stealth | T1202 Indirect Command Execution, 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: Uncommon Child Process Of Setres.EXE
id: 835e75bf-4bfd-47a4-b8a6-b766cac8bcb7
status: test
description: |
Detects uncommon child process of Setres.EXE.
Setres.EXE is a Windows server only process and tool that can be used to set the screen resolution.
It can potentially be abused in order to launch any arbitrary file with a name containing the word "choice" from the current execution path.
references:
- https://lolbas-project.github.io/lolbas/Binaries/Setres/
- https://twitter.com/0gtweet/status/1583356502340870144
- https://strontic.github.io/xcyclopedia/library/setres.exe-0E30E4C09637D7A128A37B59A3BC4D09.html
- https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/cc731033(v=ws.11)
author: '@gott_cyber, Nasreddine Bencherchali (Nextron Systems)'
date: 2022-12-11
modified: 2024-06-26
tags:
- attack.stealth
- attack.t1218
- attack.t1202
logsource:
category: process_creation
product: windows
detection:
selection:
ParentImage|endswith: '\setres.exe'
Image|contains: '\choice'
filter_main_legit_location:
Image|endswith:
- 'C:\Windows\System32\choice.exe'
- 'C:\Windows\SysWOW64\choice.exe'
condition: selection and not 1 of filter_main_*
falsepositives:
- Unlikely
level: high
Stages and Predicates
Stage 0: condition
selection and not 1 of filter_main_*Stage 1: selection
selection:
ParentImage|endswith: '\setres.exe'
Image|contains: '\choice'
Stage 2: not filter_main_legit_location
filter_main_legit_location:
Image|endswith:
- 'C:\Windows\System32\choice.exe'
- 'C:\Windows\SysWOW64\choice.exe'
Exclusions
Top-level NOT(...) conjuncts: predicates this rule actively suppresses.
| Field | Kind | Excluded values |
|---|---|---|
Image | ends_with | C:\Windows\SysWOW64\choice.exe |
Image | ends_with | C:\Windows\System32\choice.exe |
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 |
|---|---|---|
Image | match |
|
ParentImage | ends_with |
|