Detection rules › Sigma
Potential DLL Sideloading Of Libcurl.DLL Via GUP.EXE
Detects potential DLL sideloading of "libcurl.dll" by the "gup.exe" process from an uncommon location
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | |
| Stealth |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 7: Image loaded |
Rule body
title: Potential DLL Sideloading Of Libcurl.DLL Via GUP.EXE
id: e49b5745-1064-4ac1-9a2e-f687bc2dd37e
status: test
description: Detects potential DLL sideloading of "libcurl.dll" by the "gup.exe" process from an uncommon location
references:
- https://labs.withsecure.com/publications/fin7-target-veeam-servers
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-05-05
tags:
- attack.persistence
- attack.privilege-escalation
- attack.execution
- attack.stealth
- attack.t1574.001
logsource:
category: image_load
product: windows
detection:
selection:
Image|endswith: '\gup.exe'
ImageLoaded|endswith: '\libcurl.dll'
filter_main_notepad_plusplus:
Image|endswith: '\Notepad++\updater\GUP.exe'
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:
Image|endswith: '\gup.exe'
ImageLoaded|endswith: '\libcurl.dll'
Stage 2: not filter_main_notepad_plusplus
filter_main_notepad_plusplus:
Image|endswith: '\Notepad++\updater\GUP.exe'
Exclusions
The rule actively suppresses these predicates.
| Field | Kind | Excluded values | Search |
|---|---|---|---|
Image | ends_with | \Notepad++\updater\GUP.exe | excludes:Image field:"Image" value:"\Notepad++\updater\GUP.exe" |
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
Image | ends_with |
| field:"Image" kind:ends_with value:"\gup.exe" |
ImageLoaded | ends_with |
| field:"ImageLoaded" kind:ends_with value:"\libcurl.dll" |